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solid carbon dioxide (co2) is found in several bodies of the solar system, the interstellar medium (ism) and young stellar objects, where it is exposed to cosmic and stellar wind radiation. here, the chemical and physical modifications induced by heavy ion irradiation of pure solid co2 at low temperature (t = 15-30 k) ... | radiolysis and sputtering of carbon dioxide ice induced by swift ti, ni, and xe ions |
hh 212 is a class 0 protostellar system found to host a “hamburger”-shaped dusty disk with a rotating disk atmosphere and a collimated sio jet at a distance of ∼400 pc. recently, a compact rotating outflow has been detected in so and so2 toward the center along the jet axis at ∼52 au (0.″13) resolution. here we resolve... | a 100 au wide bipolar rotating shell emanating from the hh 212 protostellar disk: a disk wind? |
a tidal disruption event (tde) occurs when a star is destroyed by a supermassive black hole. broad-band radio spectral observations of tdes trace the emission from any outflows or jets that are ejected from the vicinity of the supermassive black hole. however, radio detections of tdes are rare, with <20 published to... | a radio-emitting outflow produced by the tidal disruption event at2020vwl |
we explore to what extent simple algebraic models can be used to describe h ii regions when winds, radiation pressure, gravity, and photon breakout are included. we (a) develop algebraic models to describe the expansion of photoionized h ii regions under the influence of gravity and accretion in power-law density field... | when h ii regions are complicated: considering perturbations from winds, radiation pressure, and other effects |
eleven nearby (<300 pc), short-period (50-130 d) asymptotic giant branch (agb) stars were observed in the co j = 2-1 line. detections were made towards objects that have evidence for dust production (ks - [22] ≳ 0.55 mag; ak hya, v744 cen, ru crt, α her). stars below this limit were not detected (bq gem, ɛ oct, nu p... | pulsation-triggered dust production by asymptotic giant branch stars |
we present observations with the space telescope imaging spectrograph onboard the hubble space telescope (hst) of 11 lyman continuum (lyc) leaking galaxies at redshifts, z, in the range 0.29-0.43, with oxygen abundances 12+log(o/h) = 7.64-8.16, stellar masses m⋆ ~ 107.8-109.8 m⊙, and o32 = [o iii] λ5007/[o ii] λ3727 of... | abundances of cno elements in z 0.3-0.4 lyman continuum leaking galaxies |
context. stars with masses in excess of 100 m⊙ are observed in the local universe, but they remain rare objects. because of the shape of the mass function, they are expected to be present only in the most massive and youngest clusters. they may thus be formed in number in highly star-forming galaxies.aims: very massive... | spectroscopic evolution of very massive stars at z = 1/2.5 z⊙ |
the radially averaged metallicity distribution of the interstellar medium (ism) and the young stellar population of a sample of 20 disc galaxies is investigated by means of an analytical chemical evolution model which assumes constant ratios of galactic wind mass-loss and accretion mass gain to star formation rate. bas... | the chemical evolution of local star-forming galaxies: radial profiles of ism metallicity, gas mass, and stellar mass and constraints on galactic accretion and winds |
over the past 5 yr, studies of the kinematics in protoplanetary disks have led to the discovery of new protoplanet candidates and several structures linked to possible planet-disk interactions. we detect a localized kinematic bipolar structure in the hd 163296 disk present inside the deepest dust gap at 48 au from atom... | a localized kinematic structure detected in atomic carbon emission spatially coincident with a proposed protoplanet in the hd 163296 disk |
data assimilation (da) has enabled huge improvements in the skill of terrestrial operational weather forecasting. in this study, we use a variational da scheme with a computationally efficient solar wind model and in situ observations from stereo-a, stereo-b and ace. this scheme enables solar-wind observations far from... | improving solar wind forecasting using data assimilation |
we investigate whether the fuelling of low-excitation radio galaxies (lergs) is linked to major galaxy interactions. our study utilizes a sample of 10 800 spectroscopic galaxy pairs and 97 post-mergers selected from the sloan digital sky survey with matches to multiwavelength data sets. the lerg fraction amongst intera... | galaxy pairs in the sloan digital sky survey - xii. the fuelling mechanism of low-excitation radio-loud agn. |
we present a 3d study of the formation of refractory-rich exospheres around the rocky planets hd219134b and c. these exospheres are formed by surface particles that have been sputtered by the wind of the host star. the stellar wind properties are derived from magnetohydrodynamic simulations, which are driven by observa... | characterization of the hd 219134 multi-planet system ii. stellar-wind sputtered exospheres in rocky planets b & c |
we present alma observations of the inner 1‧ (1.2 kpc) of the circinus galaxy, the nearest seyfert. we target co (1-0) in the region associated with a well-known multiphase outflow driven by the central active galactic nucleus (agn). while the geometry of circinus and its outflow make disentangling the latter difficult... | the molecular wind in the nearest seyfert galaxy circinus revealed by alma |
we use 2d (axisymmetric) and 3d hydrodynamic simulations to study bondi-hoyle-lyttleton accretion with and without transverse upstream gradients. we mainly focus on the regime of high (upstream) mach number, weak upstream gradients, and small accretor size, which is relevant to neutron star accretion in wind-fed superg... | bondi-hoyle-lyttleton accretion in supergiant x-ray binaries: stability and disc formation |
we present a versatile family of model galactic outflows including non-uniform mass and energy source distributions, a gravitational potential from an extended mass source, and radiative losses. the model easily produces steady-state wind solutions for a range of mass-loading factors, energy-loading factors, galaxy mas... | a versatile family of galactic wind models |
we implement novel numerical models of agn feedback in the sph code gadget-3, where the energy from a supermassive black hole (bh) is coupled to the surrounding gas in the kinetic form. gas particles lying inside a bi-conical volume around the bh are imparted a one-time velocity (10 000 km s-1) increment. we perform hy... | kinetic agn feedback effects on cluster cool cores simulated using sph |
both high- and low-velocity outflows are occasionally observed around a protostar by molecular line emission. the high-velocity component is called “extremely high velocity (ehv) flow, while the low-velocity component is simply referred to as “(molecular) outflow.” this study reports a newly found ehv flow and outflow ... | a very compact extremely high velocity flow toward mms 5/omc-3 revealed with alma |
we examine the combined effects of winds and photoionizing radiation from o-type stars on embedded stellar clusters formed in model turbulent molecular clouds covering a range of masses and radii. we find that feedback is able to increase the quantities of dense gas present, but decreases the rate and efficiency of the... | early evolution of embedded clusters |
i zwicky 1 (hereafter i zw 1) is the prototype optical narrow-line seyfert 1 galaxy. it is also a nearby (z = 0.0611), luminous quasi-stellar object (qso), accreting close to the eddington limit. xmm-newton observations of i zw 1 in 2015 reveal the presence of a broad and blueshifted p cygni iron k profile, as observed... | a momentum-conserving accretion disk wind in the narrow-line seyfert 1 i zwicky 1 |
laboratory studies play a crucial role in understanding the chemical nature of the interstellar medium (ism), but the disconnect between experimental timescales and the timescales of reactions in space can make a direct comparison between observations, laboratory, and model results difficult. here we study the survival... | survival of polycyclic aromatic hydrocarbon knockout fragments in the interstellar medium |
using integral field spectroscopy, we investigate the kinematic properties of 35 massive centrally dense and compact star-forming galaxies (sfgs; {log}{\overline{m}}* [{m}⊙ ]=11.1, {log}({{{σ }}}1{kpc}[{m}⊙{kpc}}-2])> 9.5, {log}({m}* /{r}e1.5[{m}⊙{kpc}}-1.5])> 10.3) at z ∼ 0.7-3.7 within the kmos3d survey. we spa... | the kmos3d survey: rotating compact star-forming galaxies and the decomposition of integrated line widths |
we present here broadband radio observations of the csm interacting sn2019oys. sn2019oys was first detected in the optical and was classified as a type ib sn. then, about $\sim 100$ days after discovery, it showed an optical rebrightening and a spectral transition to a spectrum dominated by strong narrow emission lines... | the dense and non-homogeneous circumstellar medium revealed in radio wavelengths around the type ib sn 2019oys |
we present a novel implementation for active galactic nucleus (agn) feedback through ultra-fast winds in the code gizmo. our feedback recipe accounts for the angular dependence of radiative feedback upon black hole spin. we self-consistently evolve in time i) the gas accretion process from resolved scales to an unresol... | on the connection between agn radiative feedback and massive black hole spin |
we present the first results from a hubble space telescope wide field camera 3/infrared program, which obtained direct imaging and grism observations of galaxies near quasar sightlines with a high frequency of uncorrelated foreground mg ii absorption. these highly efficient observations targeted 54 mg ii absorbers alon... | the geometry of cold, metal-enriched gas around galaxies at z ∼ 1.2 |
aims: we want to find the distribution of initial conditions that best reproduces disc observations at the population level.methods: we first ran a parameter study using a 1d model that includes the viscous evolution of a gas disc, dust, and pebbles, coupled with an emission model to compute the millimetre flux observa... | toward a population synthesis of disks and planets. ii. confronting disk models and observations at the population level |
as the classic viscous paradigm for protoplanetary disk accretion is challenged by the observational evidence of low turbulence, the alternative scenario of mhd disk winds is being explored as being potentially able to reproduce the same observed features traditionally explained with viscosity. although the two models ... | the time evolution of {m}_{d}/\\dot{m} in protoplanetary disks as a way to disentangle between viscosity and mhd winds |
we present a simple model for low-luminosity active galactic nucleus (llagn) feedback through winds produced by a hot accretion flow. the wind carries considerable energy and deposits it on the host galaxy at kiloparsec scales and beyond, heating the galactic gas and thereby quenching star formation. our model predicts... | quenching star formation with low-luminosity agn winds |
context. the behaviour of mass loss across the so-called bi-stability jump, where iron recombines from fe iv to fe iii, is a key uncertainty in models of massive stars. specifically, while an increase in mass loss is theoretically predicted, this has not yet been observationally confirmed. however, radiation-driven win... | theoretical wind clumping predictions of ob supergiants from line-driven instability simulations across the bi-stability jump |
we report on optical observations and modeling of hd96670, a single-line spectroscopic binary in the carina ob2 association. we collected 10 epochs of optical spectroscopy, and optical photometry on 17 nonconsecutive nights on the source. we construct a radial velocity curve from the spectra, and update the orbital per... | optical analysis and modeling of hd96670, a new black hole x-ray binary candidate |
we investigated incompressible and compressible magnetohydrodynamic (mhd) energy cascade rates in the solar wind at different heliocentric distances. we used in situ magnetic field and plasma observations provided by the parker solar probe mission and exact relations in fully developed turbulence. to estimate the compr... | a statistical study of the compressible energy cascade rate in solar wind turbulence: parker solar probe observations |
spiral arms are observed in numerous protoplanetary discs. these spiral arms can be excited by companions, either on bound or unbound orbits. we simulate a scenario where an unbound perturber, i.e. a flyby, excites spiral arms during a periastron passage. we run three-dimensional hydrodynamical simulations of a parabol... | exciting spiral arms in protoplanetary discs from flybys |
the power spectrum of magnetic field fluctuations in the fast solar wind (v sw > 500 km s-1) at magnetohydrodynamic scales is characterized by two different power laws on either side of a break frequency f b. the low-frequency range at frequencies f smaller than f b is often viewed as the energy reservoir that feeds... | the evolution of the 1/f range within a single fast-solar-wind stream between 17.4 and 45.7 solar radii |
stars are likely to form or to be captured in active galactic nucleus (agn) discs. their mass reaches an equilibrium when their rate of accretion is balanced by that of wind. if the exchanged gas is well mixed with the stellar core, this metabolic process would indefinitely sustain an 'immortal' state on the main seque... | the impermanent fate of massive stars in agn discs |
changing-look active galactic nuclei (agns) present an important laboratory to understand the origin and physical properties of the broad-line region (blr). we investigate follow-up optical spectroscopy spanning ~500 days after the outburst of the changing-look agn 1es 1927+654. the emission lines displayed dramatic, s... | the host galaxy and rapidly evolving broad-line region in the changing-look active galactic nucleus 1es 1927+654 |
the nearby m dwarf wx uma has recently been detected at radio wavelengths with lofar. the combination of its observed brightness temperature and circular polarization fraction suggests that the emission is generated via the electron-cyclotron maser instability. two distinct mechanisms have been proposed to power such e... | radio masers on wx uma: hints of a neptune-sized planet, or magnetospheric reconnection? |
we simulate neutrino-antineutrino oscillations caused by strong magnetic fields in dense matter. with the strong magnetic fields and large neutrino magnetic moments, majorana neutrinos can reach flavor equilibrium. we find that the flavor equilibration of neutrino-antineutrino oscillations are sensitive to the values o... | neutrino-antineutrino oscillations induced by strong magnetic fields in dense matter |
we investigate flavor phenomenology and dark matter in the context of the scotogenic model. in this model, the neutrino masses are generated through radiative corrections at the one-loop level. considering the neutrino mixing matrix to be of tri-bimaximal form with additional perturbations to accommodate the recently o... | implications of fermionic dark matter on recent neutrino oscillation data |
we present a detailed analysis and phenomenological consequences of neutrino mass matrix, mν, with one-zero texture in the flavor basis where the active neutrino sector is extended by one sterile neutrino (3+1 case). in particular, our aim is to explore behavior of the sterile mixing parameters in detail when one of th... | understanding the masses and mixings of one-zero textures in 3+1 scenario |
we summarize the impact of sterile neutrino dark matter on core-collapse supernova explosions. we explore various oscillations between electron neutrinos or mixed μ - τ neutrinos and right-handed sterile neutrinos that may occur within a core-collapse supernova. in particular, we consider sterile neutrino masses and mi... | impact of sterile neutrino dark matter on core-collapse supernovae |
the nucleon axial form factor is a dominant contribution to errors in neutrino oscillation studies. lattice qcd calculations can help control theory errors by providing first-principles information on nucleon form factors. in these proceedings, we present preliminary results on a blinded calculation of $g_a$ and the ax... | calculation of the nucleon axial form factor using staggered lattice qcd |
the baryon asymmetry of the universe should have been produced after the inflation era. we consider the possibility that the asymmetry is generated by the flavor oscillations in the reheating process after inflation, so that the baryon asymmetry is realized already at the beginning of the radiation dominated era. in th... | primordial lepton oscillations and baryogenesis |
neutrino oscillations in a hot and dense astrophysical environment such as a core-collapse supernova pose a challenging, seven-dimensional flavor transport problem. to make the problem even more difficult (and interesting), neutrinos can experience collective oscillations through nonlinear refraction in the dense neutr... | collective neutrino oscillations and spontaneous symmetry breaking |
we explore the possibility of probing the nonstandard interactions between the neutrino and a hypothetical massive scalar or pseudoscalar via neutrino flavor transformation in supernovae. we find that in the ultrarelativistic limit, the effective interaction between the neutrinos vanishes if neutrinos are dirac fermion... | neutrino flavor transformation in supernovae as a probe for nonstandard neutrino-scalar interactions |
neutrino oscillations are genuine quantum phenomena in which coherent oscillations are maintained over a long distance. as a result, in principle, the phenomena can be studied efficiently using quantum simulations. in today's noisy quantum hardware, encoding neutrinos in a multiqubit system requires a redundant basis a... | simulating neutrino oscillations on a superconducting qutrit |
the one-loop electroweak radiative corrections to coherent forward neutrino scattering in a medium slightly violates the tree-level universality of neutral-current contributions of three neutrino flavors to the matter potential that is relevant to neutrino oscillations in matter. we examine this small but nontrivial qu... | one-loop radiative correction to the toshev relation for neutrino oscillations in matter |
in this study, we work in the framework of the next-to-minimal extension of the standard model (nmssm) extended by six singlet leptonic superfields. through the mixing with the three doublet leptonic superfields, the non-zero tiny neutrino masses can be generated through the inverse seesaw mechanism. while r-parity is ... | loop-corrected higgs masses in the nmssm with inverse seesaw mechanism |
matter-neutrino resonances (mnrs) can drastically modify neutrino flavor evolution in astrophysical environments and may significantly impact nucleosynthesis. here we further investigate the underlying physics of mnr-type flavor transitions. we provide generalized resonance conditions and make analytical predictions fo... | uncovering the matter-neutrino resonance |
neutrinos propagating in dense astrophysical environments sustain nonlinear refractive effects due to neutrino-neutrino forward scattering. we study geometric phases in neutrino oscillations that arise out of cyclic evolution of the potential generated by these forward-scattering processes. we perform several calculati... | geometric phases in neutrino oscillations with nonlinear refraction |
although neutrino-antineutrino states originating from neutral-current interactions are blind concerning the flavor state, an oscillation pattern is predicted provided that both neutrino and antineutrino are detected. this issue arises from both the coherence and entanglement of the neutrino-antineutrino states. based ... | quantum coherence and entanglement in neutral-current neutrino oscillation in matter |
we investigate the collective neutrino oscillations under the three-flavor multiangle approximation in a spherically symmetric simulation of failed supernovae. a failed supernova emits high neutrino fluxes in a short time, while intense accretion proceeds with a high enough electron density to experience recollapse int... | collective neutrino oscillations and detectabilities in failed supernovae |
it is shown that the postulation of a minimum length for the horizons of a black hole leads to lower bounds for the electric charges and magnetic moments of elementary particles. if the minimum length has the order of the planck scale, these bounds are given, respectively, by the electronic charge and by μ ∼10-21μb . t... | elementary charge and neutrino's mass from planck length |
we simulate the time evolution of collective neutrino oscillations in two-flavor settings on a quantum computer. we explore the generalization of trotter-suzuki approximation to time-dependent hamiltonian dynamics. the trotterization steps are further optimized using the cartan decomposition of two-qubit unitary gates ... | collective neutrino oscillations on a quantum computer with hybrid quantum-classical algorithm |
we study the conditions under which the majorana phase of the two flavor neutrino mixing matrix appears in the oscillation probabilities and causes c p violation. we find that the majorana phase remains in the neutrino evolution equation if the neutrino decay eigenstates are not aligned with the mass eigenstates. we sh... | c p violation due to a majorana phase in two flavor neutrino oscillations with decays |
the observation of neutrino oscillations and masses motivates the extension of the standard model with right handed neutrinos, leading to heavy neutrino states possibly in the electroweak scale, which could be impacted by new high-scale weakly coupled physics. a systematic tool for studying these interactions is the ne... | sensitivity prospects for lepton-trijet signals in the $\\nu$smeft at the lhec |
we study the mixing of different kind of fields (scalar in 0+1d, scalar in 3+1d, fermion in 3+1d) treating the mixing term as an interaction. to this aim, we employ the usual perturbative series in the interaction picture. we find that expression for flavor changing probability exhibits corrections with respect to the ... | neutrino oscillations in the interaction picture |
a single power law flux spectrum of high energy neutrinos does not adequately explain the entire 60 tev to 10 pev event spectrum observed at icecube, specially the excess of pev events and the lack of glashow resonance events expected at 6.3 pev cannot be simultaneously explained by a single power law source neutrino f... | explanation of icecube spectrum with ν → 3 ν neutrino splitting in a ν2hdm model |
we examine the parameter space region of the inverse seesaw model that is consistent with neutrino oscillation data. we focus on the correlation between the current limits from the search of the μ →e γ lepton flavor violating decay and the nonstandard effects associated with the presence of new heavy neutrino states. u... | charged lepton-flavor violating processes and suppression of nonunitary mixing effects in low-scale seesaw models |
we study the evolution and oscillations of fixed massive neutrinos interacting with stochastic gravitational waves (gws). the energy spectrum of these gws is gaussian, with the correlator of the amplitudes being arbitrary. we derive the equation for the density matrix for flavor neutrinos in this case. in the two flavo... | flavor ratios of astrophysical neutrinos interacting with stochastic gravitational waves having arbitrary spectra |
in this work we investigate the effect a crystalline quark–hadron mixed phase can have on the neutrino emissivity from the cores of neutron stars. to this end we use relativistic mean-field equations of state to model hadronic matter and a nonlocal extension of the three-flavor nambu–jona–lasinio model for quark matter... | neutrino emissivity in the quark-hadron mixed phase |
we propose a non-renormalizable b -l model with s3×z4×z2 symmetry which successfully accommodates the current active-sterile neutrino mixing in 3 +1 scheme. the s3 flavor symmetry is supplemented by z4⊗z2 symmetry to consolidate the yukawa interaction of the model. the presence of s3⊗z4⊗z2 flavour symmetry plays an imp... | 3 +1 active-sterile neutrino mixing in b -l model with s3×z4×z2 symmetry for normal neutrino mass ordering |
we set up a proposal to extend significantly recent works on neutrino-plasma interaction, allowing the possibility of deep degenerate and relativistic electrons, which are often present in compact stars such as high-density white dwarfs. the methodology involves the covariant hydrodynamic formulation of ultradense plas... | neutrino oscillations and instabilities in degenerate relativistic astrophysical plasmas |
leptogenesis appears to be a viable alternative to account for the baryon asymmetry of the universe through baryogenesis. in this context, we consider a scenario in which the standard model is extended with s3 and z2 symmetry in addition to the two scalar triplets, two scalar doublets and three right-handed neutrinos. ... | scalar triplet leptogenesis in the presence of right-handed neutrinos with s3 symmetry |
in this paper, we consider the neutrino and anti-neutrino emerging from the z0 decay and the wave packet quantum mechanical approach is used to obtain the probability of detecting a neutrino of flavor α and the corresponding anti-neutrino of flavor β at the positions l and $\bar{l}$ l ¯ , respectively. for this purpose... | quantum wave packet approach to oscillation of {z}(0) z 0 decay neutrinos |
we study oscillations of dirac neutrinos in background matter and a plane electromagnetic wave. first, we find the new exact solution of the dirac-pauli equation for a massive neutrino with the anomalous magnetic moment electroweakly interacting with matter under the influence of a plane electromagnetic wave with the c... | spin-flavor oscillations of dirac neutrinos in matter under the influence of a plane electromagnetic wave |
we propose a radiative neutrino-mass model by introducing 3 generations of fermion pairs e-(n +1 )/2e+(n +1 )/2 and a couple of multicharged bosonic doublet fields φn /2,φn /2 +1, where n =1 , 3, 5, 7, 9. we show that the models can satisfy the neutrino masses and oscillation data, and are consistent with lepton-flavor... | generalized one-loop neutrino mass model with charged particles |
in the binary-driven hypernova model of long gamma-ray bursts, a carbon–oxygen star explodes as a supernova in the presence of a neutron star binary companion in close orbit. hypercritical (i.e., highly super-eddington) accretion of the ejecta matter onto the neutron star sets in, making it reach the critical mass with... | neutrino oscillations in neutrino-dominated accretion around rotating black holes |
we reconsider the standard scheme for description of neutrino spin-flavor oscillations aiming at a rigorous derivation of evolution equation for the mixed flavor neutrino states in magnetic field. for this purpose we obtain the evolution equation in the physical basis of massive neutrinos and then trace its transformat... | neutrino spin-flavor oscillations derived from the mass basis |
we present a formulation of lepton family numbers, based on quantum field theory, for neutrino oscillation phenomenology that can be applied to nonrelativistic and relativistic energies for neutrinos. it is formulated for both types of neutrinos, dirac and majorana. the formulation is constructed as the time evolution ... | spacetime evolution of lepton number densities and wave-packet-like effects for neutrino flavor and chiral oscillations in quantum field theory |
we study spin and spin-flavor oscillations of dirac neutrinos in a plane electromagnetic wave with circular polarization. the evolution of massive neutrinos with nonzero magnetic moments in the field of an electromagnetic wave is based on the exact solution of the dirac-pauli equation. we formulate the initial conditio... | spin-flavor oscillations of dirac neutrinos in a plane electromagnetic wave |
in an analytical way of studying matter effects on neutrino oscillations, the naumov and toshev relations have been derived to respectively link the jarlskog invariant of cp violation and the dirac phase in the standard parametrization of the 3 × 3 flavor mixing matrix to their matter-corrected counterparts. here we sh... | naumov- and toshev-like relations in the renormalization-group evolution of quarks and dirac neutrinos |
we consider a class of models for the relativistic covariant wave packets (wps) which can be used as asymptotically free in and out states in the quantum field theoretical formalisms for description of the neutrino flavor oscillation phenomenon. we demonstrate that the new “asymmetric” wave packet (awp) is an appropria... | covariant asymmetric wave packet for a field-theoretical description of neutrino oscillations |
the article reviews the conditions for lepton-flavor conservation in leptonic interactions. the conditions are similar to those developed in the quark sector. for neutrinos the mass eigenstates are unitary superpositions of flavor states which together with small mass differences produce neutrino oscillations. a new pr... | flavor changing neutral couplings for leptons |
we develop the approach to the problem of neutrino oscillations in a magnetic field introduced in \cite{popov:2019nkr} and extend it to the case of three neutrino generations. the theoretical framework suitable for computation of the dirac neutrino spin, flavour and spin-flavour oscillations probabilities in a magnetic... | neutrino eigenstates and flavour, spin and spin-flavour oscillations in a constant magnetic field |
propagation of fermions in spacetime requires a spin connection, which can be split into a universal gravitational part and a non-universal ``contorsion'' part. the latter is non-dynamical and can be eliminated from the theory, leaving an effective four-fermion interaction with unknown coupling constants. the generic f... | effect of spacetime geometry on neutrino oscillations |
in screening models with scalar-matter conformal coupling, we study the flavor transition of neutrinos. we employ an analytical method for studying the oscillation phase in a spherically symmetric spacetime filled by a scalar field. since the ambient matter density determines the scalar field's behavior, an indirect en... | screening models and neutrino oscillations |
in this paper, we study the phenomenology of a dirac dark matter in the $l_\mu-l_\tau$ model and investigate the neutrino oscillation in the dark halo. since dark matter couples to the muon neutrino and the tau neutrino with opposite sign couplings, it contributes effective potentials, $\pm a_\chi$, to the evolution eq... | neutrino oscillation in dark matter with $l_\\mu-l_\\tau$ |
a proposal for the neutrino mass, based on neutrino-scalar field interaction, is introduced. the scalar field is also non-minimally coupled to the ricci scalar, and hence relates the neutrino mass to the matter density. in a dense region, the scalar field obeys the z2 symmetry, and the neutrino is massless. in a dilute... | symmetry breaking, and the effect of matter density on neutrino oscillation |
we investigate the phenomenology of singlet scalar dark matter in a simple $\rm u(1)_{b-l}$ gauge extension of standard model, made anomaly free with four exotic fermions. the enriched scalar sector and the new gauge boson $z^\prime$, associated with $\rm u(1)$ gauge extension, connect the dark sector to the visible se... | scalar dark matter, neutrino mass and leptogenesis in a $\\rm u(1)_{b-l}$ model |
the present neutrino oscillation data allow m1=0 (or m3=0) for the neutrino mass spectrum and support θ23≃π∕4 and δ≃−π∕2 as two good approximations for the pmns lepton flavor mixing matrix u. we show that these intriguing possibilities can be a very natural consequence of the translationalμ-τ reflection symmetry — the ... | the translational μ-τ reflection symmetry of majorana neutrinos |
neutrino mixing is caused by the fact that neutrino flavors are not eigenstates of the free hamiltonian. this causes oscillations among different neutrino flavors. when neutrinos pass through a medium, weak interactions produce different effective masses for neutrinos of different flavors, leading to a modification of ... | neutrino oscillations induced by chiral torsion |
the high energy neutrinos produced in a choked gamma-ray burst can undergo matter oscillation before emerging out of the stellar envelope. before reaching the detector on earth, these neutrinos can undergo further vacuum oscillation and then earth matter oscillation when crossing the diameter of the earth. in the conte... | high energy neutrinos from choked grbs and their flavor ratio measurement by the icecube |
correlations exhibited by neutrino oscillations are studied via quantum information theoretic quantities. we show that the strongest type of entanglement, genuine multipartite entanglement, is persistent in the flavour changing states. we prove the existence of bell-type nonlocal features, in both its absolute and genu... | a quantum information theoretic analysis of three flavor neutrino oscillations |
the quasi-classical equation that describes both neutrino flavor oscillations and spin rotation in dense matter is obtained in the framework of quantum field theory. the solution of this equation for homogeneous medium is found. the probabilities of the spin-flavor transitions in unpolarized moving matter are calculate... | neutrino oscillations in a homogeneous moving medium |
we investigate the phenomenology of singlet scalar dark matter (dm) in a simple u(1)b‑l gauge extension of the standard model, made anomaly-free with four exotic fermions. the enriched scalar sector and the new gauge boson z', associated with u(1) gauge extension, connect the dark sector to the visible sector. we compu... | scalar dark matter, neutrino mass and leptogenesis in a u(1)b‑l model |
as the first topic, we propose a new parametrization of the complex yukawa matrix in the scotogenic model. the new parametrization is compatible with the particle data group parametrization of the neutrino sector. some analytical expressions for the neutrino masses with the new parametrization are shown. as the second ... | parametrization of the yukawa matrix in the scotogenic model and single-zero textures of the neutrino mass matrix |
three-flavor neutrino oscillations in matter can be described by three effective neutrino masses $\widetilde{m}^{}_i$ (for $i = 1, 2, 3$) and the effective mixing matrix $v^{}_{\alpha i}$ (for $\alpha = e, \mu, \tau$ and $i = 1, 2, 3$). when the matter parameter $a \equiv 2\sqrt{2} g^{}_{\rm f} n^{}_e e$ is taken as an... | continuous and discrete symmetries of renormalization group equations for neutrino oscillations in matter |
sbnd (short-baseline near detector) will be a 112 ton liquid argon tpc neutrino detector located 110 m from the target of the fermilab booster neutrino beam. sbnd, together with the microboone and icarus-t600 detectors at 470 m and 600 m, respectively, make up the fermilab short-baseline neutrino (sbn) program. sbn wil... | physics program of the short-baseline near detector |
in this paper, beyond standard models are considered with additional scalar triplets without modification of the gauge group (higgs triplet model—htm) and with an extended gauge group su(2)r⊗su(2)l⊗u(1) (left–right symmetric model—lrsm). these models differ drastically in possible triplet vacuum expectation values (vev... | doubly charged higgs bosons and spontaneous symmetry breaking at ev and tev scales |
in an environment with high-density neutrinos formed in a core-collapse supernova (ccsn), the neutrinos exhibit nonlinear and complex oscillation behaviors due to their self-interactions. the onset of this nonlinear oscillation can be investigated by linearizing the evolution equation for small perturbations around the... | spatiotemporal linear instability analysis of collective neutrino flavor conversion in four-dimensional spacetime |
the influence of neutrino flavor oscillations on the propagation of magnetohydrodynamic (mhd) waves and instabilities is studied in neutrino-beam driven magnetoplasmas. using the neutrino mhd model, a general dispersion relation is derived which manifests the resonant interactions of mhd waves, not only with the neutri... | neutrino magnetohydrodynamic instabilities in presence of two-flavor oscillations |
in nuclear matter at neutron-star densities and temperatures, cooper pairing leads to the formation of a gap in the nucleon excitation spectra resulting in exponentially strong boltzmann suppression of many transport coefficients. previous calculations have shown evidence that density oscillations of sufficiently large... | gap-bridging enhancement of modified urca processes in nuclear matter |
the supernova neutrino flavor evolution in the presence of the non-trivial neutrino magnetic moment and strong magnetic field is numerically derived using the two-flavor and single-angle approximation. the novel properties of collective neutrino oscillations are studied and distinct patterns of flavor and spin-flavor s... | spin flavor spectral splits of supernova neutrino flavor conversions |
an extension of the standard model with anomaly free u (1 )f flavor symmetry is studied in this paper. with this extension and the addition of the right-handed neutrino states, the solution of anomaly free charge assignments is found, which gives appealing texture zero and hierarchical yukawa matrices. this gives us a ... | sm extension with a gauged flavor u (1 )f symmetry |
we analyze the t-invariance violation in probabilities of flavor transitions and neutrino spin rotation in a dense medium in an electromagnetic field. since the electromagnetic field and the potentials of interaction with the medium appear in the wave equation for the neutrino, the model considered here is a theory wit... | t-violation in neutrino oscillations |
we present a covariant ray tracing algorithm for computing high-resolution neutrino distributions in general relativistic numerical spacetimes with hydrodynamical sources. our formulation treats the very important effect of elastic scattering of neutrinos off of nuclei and nucleons (changing the neutrino's direction bu... | elastic scattering in general relativistic ray tracing for neutrinos |
neutrinos produced in extragalactic sources may experience flavor-oscillations and decoherence on their way to earth due to their interaction with dark matter (dm). as a result, they may be detected in pointer-states other than the flavor states produced at the source. the oscillation pattern and the structure of the p... | extragalactic neutrinos as tracers of dark matter? |
as a result of a nontrivial mixing matrix, neutrinos cannot be simultaneously in a flavor and mass eigenstate. we formulate and discuss information entropic relations that quantify the associated quantum uncertainty. we also formulate a protocol to determine the pontecorvo-maki-nakagawa-sakata (pmns) matrix from quantu... | neutrino flavor-mass uncertainty relations and an entanglement-assisted determination of the pmns matrix |
it is known in vacuum that the three-flavor neutrino survival probability can be approximated by the effective two-flavor form to first orders in ɛ≡ δm 21 2 / δm 31 2 , with introduction of the effective δmαα2 ( α = e, μ, τ), in regions of neutrino energy e and baseline l such that δm 31 2 l/2 e ∼ π. here, we investiga... | an effective two-flavor approximation for neutrino survival probabilities in matter |
we recently studied neutrinos flavor oscillations in vacuum within conformal coupling models. in this paper, we extend that analysis by investigating neutrino flavor oscillations inside matter within a general conformal coupling scenario. we first derive the general formula for the flavor transition probability inside ... | neutrino flavor oscillations inside matter in conformal coupling models |
the geometric picture of neutrino oscillations offers a unique way to study the quantum mechanics of this phenomenon. in this picture, the propagation of a neutrino beam is described by a density matrix evolving in a state space with non-trivial geometry. we derive explicit expressions of the mixed state geometric phas... | mixed state geometric phase for neutrino oscillations |
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