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QCD Effective Actions at High Temperature and the Quasiparticle Picture: Transport theory is an efficient approach to derive an effective theory for
the soft modes of QCD at high temperature. It is known that the leading order
operators of this theory can be obtained from (semi-classical) kinetic
equations of quasipart... | hep-ph |
Probing Quintessence with Time Variation of Couplings: Many models of quintessence predict a time variation of the fundamental
constants as well as a composition-dependent gravity like long-range force
mediated by the cosmon. We present bounds for the cosmon coupling to matter and
radiation within a grand unified frame... | hep-ph |
Isospin-conserving hadronic decay of the ${D_{s1}(2460)}$ into
${D_sπ^+π^-}$: The internal structure of the charm-strange mesons $D_{s0}^*(2317)$ and
$D_{s1}(2460)$ are subject of intensive studies. Their widths are small because
they decay dominantly through isospin-breaking hadronic channels
$D_{s0}^*(2317)^+\to D_... | hep-ph |
A comparison between direct and indirect dark matter search: We carry out a comparison between different kinds of experiments for the
detection of neutralino dark matter. In particular, we compare the theoretical
predictions for the direct detection of these particles, through their elastic
scattering on target nuclei ... | hep-ph |
Deconfinement and Chiral Symmetry Restoration in a Strong Magnetic
Background: We perform a model study of deconfinement and chiral symmetry restoration in
a strong magnetic background. We use a Nambu-Jona Lasinio model with the
Polyakov loop, taking into account a possible dependence of the coupling on the
Polyakov ... | hep-ph |
Tests for Sivers, Boer-Mulders and transversity distributions in
difference cross sections in SIDIS: A major experimental program is presently underway to determine the Sivers,
Boer-Mulders and transversity distributions, vital for understanding the
internal structure of the nucleon. To this end we consider the Siver... | hep-ph |
Neutron-Electron EDM Correlations in Supersymmetry and Prospects for EDM
Searches: Motivated by recent progress in experimental techniques of electric dipole
moment (EDM) measurements, we study correlations between the neutron and
electron EDMs in common supersymmetric models. These include minimal
supergravity (mSUG... | hep-ph |
Jet quenching in heavy ion collisions at LHC: We discuss the potential information about highly excited QCD-matter provided
by medium-induced partonic energy loss, known as ``jet quenching''. In
particular, with its large acceptance hadronic and electromagnetic calorimetry,
the Compact Muon Solenoid detector at LHC col... | hep-ph |
Interactions of the doubly charmed state $T_{cc} ^+$ with a hadronic
medium: We investigate the absorption and production processes of this new state in a
hadronic medium, considering the reactions $T_{cc}^+ \pi, T_{cc}^+ \rho
\rightarrow D^{(*)} D^{(*)} $ and the corresponding inverse reactions. We use
effective fie... | hep-ph |
LUXE-NPOD: new physics searches with an optical dump at LUXE: We propose a novel way to search for feebly interacting massive particles,
exploiting two properties of systems involving collisions between high energy
electrons and intense laser pulses. The first property is that the
electron-intense-laser collision resul... | hep-ph |
Selecting Supersymmetric String Scenarios From Sparticle Spectra: We approach the following question: if supersymmetry is discovered, how can
we select among different supersymmetric extensions of the Standard Model? In
particular, we perform an analysis of the sparticle spectrum in low-energy
string effective theories... | hep-ph |
The D_4 flavor symmery in 3-3-1 model with neutral leptons: We construct a $D_4$ flavor model based on SU(3)_C X SU}(3_L X U(1)_X gauge
symmetry responsible for fermion masses and mixings. The neutrinos get small
masses from antisextets which are in a singlet and a doublet under $D_4$. If
the D_4 symmetry is violated a... | hep-ph |
Stitching the Yukawa Quilt: We develop a systematic analysis of quark mass matrices which, starting with
the measured values of quark masses and mixing angles, allows for a model
independent search for all possible (symmetric or hermitian) mass matrices
having texture zeroes at the unification scale. A survey of all si... | hep-ph |
Impact of the Recoil Scheme on the Accuracy of Angular-Ordered Parton
Showers: In these proceedings we present three possible interpretations of the
ordering variable implemented in the Herwig7 angular-ordered parton shower.
Each interpretation determines a different recoil-scheme prescription and we
show how it can ... | hep-ph |
$π$-$J/ψ$ Correlation and Elliptic Flow Parameter $v_2$ of Charmed
Mesons at RHIC Energy: We study the correlation between the trigger $\pi$ and the associated
$J/\psi$ on near and away sides in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV.
In the region of trigger momentum $p_t>4$ GeV/$c$, the $\pi$ spectrum is
compo... | hep-ph |
Dijet hadroproduction with rapidity gaps and QCD double logarithmic
effects: We show that the hadroproduction of a pair of jets with large transverse
energy in the central region bounded by rapidity gaps is an ideal process to
see important double logarithmic QCD suppression effects. We compute the cross
sections for... | hep-ph |
Sign problem and the chiral spiral on the finite-density lattice: We investigate the sign problem of the fermion determinant at finite baryon
density in (1+1) dimensions, in which the ground state in the chiral limit
should be free from the sign problem by forming a chiral spiral. To confirm it,
we evaluate the fermion... | hep-ph |
Cogenesis of Baryon Asymmetry and Gravitational Dark Matter from
Primordial Black Holes: We propose a scenario where dark matter (DM) with a wide mass range from a
few keV to PeV can be produced solely from evaporating primordial black holes
(PBH), while being consistent with the required free streaming length for
st... | hep-ph |
Split-SUSY dark matter in light of direct detection limits: We examine the present and future XENON limits on the neutralino dark matter
in split supersymmetry (split-SUSY). Through a scan over the parameter space
under the current constraints from collider experiments and the WMAP
measurement of the dark matter relic ... | hep-ph |
Relativistic description of the double charmonium production in $e^+e^-$
annihilation: New evaluation of the relativistic effects in the double production of
$S$-wave charmonium states is performed on the basis of perturbative QCD and
the relativistic quark model. The main improvement consists in the exact
account of... | hep-ph |
B^0_{d,s} - \bar{B}^0_{d,s} mass-differences from QCD spectral sum rules: We present the first QCD spectral sum rules analysis of the SU(3) breaking
parameter \xi and an improved estimate of the renormalization group invariant
(RGI) bag constant \hat{B}_{B_q} both entering into the B^0_{d,s} -
\bar{B}^0_{d,s} mass-diff... | hep-ph |
Gravitational waves as a probe of SUSY scale: We investigate the sources of the Hubble-induced mass for a flat direction in
supersymmetric theories and show that the sign of the Hubble-induced mass
generally changes just after the end of inflation. This implies that global
cosmic strings generally form after the end of... | hep-ph |
The $η- η'$ Mixing Angle Revisited: The value of the $\eta - \eta'$ mixing angle $\theta_P$ is phenomenologically
deduced from a rather exhaustive and up-to-date analysis of data including
strong decays of tensor and higher-spin mesons, electromagnetic decays of
vector and pseudoscalar mesons, $J/\psi$ decays into a ve... | hep-ph |
Symmetries in $B \to D^* \ell ν$ angular observables: We apply the formalism of amplitude symmetries to the angular distribution of
the decays $B \to D^* \ell \nu$ for $\ell=e,\mu,\tau$. We show that the angular
observables used to describe the distribution of this class of decays are not
independent in absence of New ... | hep-ph |
Planar three-loop master integrals for $2 \to 2$ processes with one
external massive particle: We present analytic results for the two tennis-court integral families
relevant to $2\to2$ scattering processes involving one massive external
particle and massless propagators in terms of Goncharov polylogarithms of up to
... | hep-ph |
Local spatial densities for composite spin-3/2 systems: The definition of local spatial densities by using sharply localized
one-particle states is applied to spin-3/2 systems. Matrix elements of the
electromagnetic current and the energy-momentum tensor are considered and
integral expressions of associated spatial dis... | hep-ph |
Neutrality of the color-flavor-locked phase in a Dyson-Schwinger
approach: The role of neutrality constraints for the phase structure of QCD at
non-vanishing chemical potentials is studied within a self-consistent
truncation scheme for the Dyson-Schwinger equation of the quark propagator in
Landau gauge. We find the ... | hep-ph |
Graviton-mediated dark matter model explanation the DAMPE electron
excess and search at $e^+e^-$ colliders: The very recent result of the DAMPE cosmic ray spectrum of electrons shows a
narrow bump above the background at around 1.4 TeV. We attempt to explain the
DAMPE electron excess in a simplified Kaluza-Klein grav... | hep-ph |
Non-perturbative effects for dark sectors with QCD portals: In this work, we consider a class of dark matter (DM) models where the DM
does not directly interact with the Standard Model (SM) particles at the
tree-level. Therefore, the coannihilation mechanism is crucial in achieving the
correct DM relic abundance, which... | hep-ph |
Universality test of the charged Higgs boson couplings at the LHC and at
B factories: Many extensions of the Standard Model (SM) of particle physics predict the
existence of charged Higgs bosons with substantial couplings to SM particles,
which would render them observable both directly at the LHC and indirectly at
B... | hep-ph |
The hunt for sub-GeV dark matter at neutrino facilities: a survey of
past and present experiments: We survey the sensitivity of past and present neutrino experiments to MeV-GeV
scale dark matter, and find that these experiments possess novel sensitivity
that has not yet fully explored. NO$\nu$A and BEBC are found to ... | hep-ph |
Molecular states from
$Σ^{(*)}_c\bar{D}^{(*)}-Λ_c\bar{D}^{(*)}$ interaction: In this work, we systemically investigate the molecular states from the
$\Sigma^{(*)}_c\bar{D}^{(*)}-\Lambda_c\bar{D}^{(*)}$ interaction with the help
of the Lagrangians with heavy quark and chiral symmetries in a quasipotential
Bethe-Salpet... | hep-ph |
Gravitational wave spectra from oscillon formation after inflation: We systematically investigate the preheating behavior of single field
inflation with an oscillon-supporting potential. We compute the properties of
the emitted gravitational waves (GWs) and the number density and
characteristics of the produced oscillo... | hep-ph |
Final-State Phases in $B \to D π, D^* π$, and $D ρ$ Decays: The final-state phases in $\bar{B} \to D \pi, D^* \pi$, and $D \rho$ decays
appear to follow a pattern similar to those in $D \to \bar{K} \pi$, $\bar{K}^*
\pi$, and $\bar{K} \rho$ decays. Each set of processes is characterized by
three charge states but only t... | hep-ph |
Higgs inflation in a radiative seesaw model: We investigate a simple model to explain inflation, neutrino masses and dark
matter simultaneously. This is based on the so-called radiative seesaw model
proposed by Ma in order to explain neutrino masses and dark matter by
introducing a $Z_2$-odd isospin doublet scalar fiel... | hep-ph |
On power corrections to event shapes: Recent work on the theme of power corrections in perturbative QCD is briefly
reviewed, with an emphasis on event shapes in e+ e- annihilation. The
factorization of soft gluon effects is the main tool: it leads to resummation,
and thus highlights the limitations of perturbation theo... | hep-ph |
Low-energy meson phenomenology with Resonance Chiral Lagrangians: The low energy behaviour of Quantum Chromodynamics makes unreliable an
expansion in terms of its coupling strength, since nothing guarantees the
convergence of such expansion. To overcomer such difficulty one resorts to
Lattice QCD or Effective Field The... | hep-ph |
Improved bounds on non-luminous matter in solar orbit: We improve, using a larger set of observations including Voyager 2 Neptune
flyby data, previous bounds on the amount of dark matter (DM) trapped in a
spherically symmetric distribution about the sun. We bound DM by noting that
such a distribution would increase the... | hep-ph |
Third-order non-Coulomb correction to the S-wave quarkonium wave
functions at the origin: We compute the third-order correction to the S-wave quarkonium wave functions
|\psi_n(0)|^2 at the origin from non-Coulomb potentials in the effective
non-relativistic Lagrangian. Together with previous results on the Coulomb
co... | hep-ph |
Consistent Scenarios for Cosmic-Ray Excesses from Sommerfeld-Enhanced
Dark Matter Annihilation: Anomalies in direct and indirect detection have motivated models of dark
matter consisting of a multiplet of nearly-degenerate states, coupled by a new
GeV-scale interaction. We perform a careful analysis of the thermal fr... | hep-ph |
CP Violation in the B System: Strategies for extracting CKM phases from non-leptonic $B$ decays are
reviewed briefly. Both general aspects and some recent developments including
CP-violating asymmetries, the $B_s$ system in light of a possible width
difference $\Delta\Gamma_s$, and triangle relations among $B$ decay am... | hep-ph |
Tracking down hyper-boosted top quarks: The identification of hadronically decaying heavy states, such as vector
bosons, the Higgs, or the top quark, produced with large transverse boosts has
been and will continue to be a central focus of the jet physics program at the
Large Hadron Collider (LHC). At a future hadron c... | hep-ph |
Some tests for the helicity structure of the pomeron in $ep$ collisions: We discuss the reaction $e p \to e \tilde{p} X$ in the one-photon exchange
approximation, where it is in essence the reaction $\gamma^{*} p \to \tilde{p}
X$. A large rapidity gap is required between the particle or particles of the
proton remnant ... | hep-ph |
Simple and robust method for search Dark Matter particles and measuring
their properties at ILC in various models of DM: I suggest simple method for the search of Dark Matter particles and some
related particles which allows to measure reliably their mass and spin in a
wide class of models for Dark Matter. | hep-ph |
Axion and Right-handed Neutrino in the Minimal SUSY SO(10) Model: The connection between the axion and right-handed neutrinos is explored in
the framework of the minimal SUSY SO(10) model. The former is related to the
Peccei-Quinn (PQ) solution to the strong CP problem and the latter is to the
light Majorana neutrinos ... | hep-ph |
Dark matter stability from non-Abelian discrete flavor symmetries: We present a mechanism for the dark matter stability in the framework of a
non-Abelian avour symmetry renormalizable model. The same non-abelian discrete
avor symmetry which accounts for the observed pattern of neutrino oscillations,
spontaneously break... | hep-ph |
Empirical Parameterization of Nucleon-Nucleon Elastic Scattering
Amplitude at High Beam Momenta for Glauber Calculations and Monte Carlo
Simulations: A parameterization of the nucleon-nucleon elastic scattering amplitude is
needed for future experiments with nucleon and nuclear beams in the beam
momentum range of 2... | hep-ph |
Can the Super-Kamiokande Atmospheric Data Predict the Solar Neutrino
Deficit ?: In this Letter we show that the evidence for neutrino oscillations from the
Super-Kamiokande atmospheric neutrino data fully determines the 3x3
neutrino-oscillations mixing matrix and predicts an energy independent solar
neutrino deficit ... | hep-ph |
Evolution of gluon TMDs from small to moderate x: Recently we obtained an evolution equation of gluon TMDs, which addresses a
problem of unification of different kinematic regimes. It describes evolution
in the whole range of Bjorken $x_B$ and the whole range of transverse momentum
$k_\perp$. In this notes I study diff... | hep-ph |
Reconstructing events with missing transverse momentum at the LHC and
its application to spin measurement: In this article we discuss the measurement of spin at the LHC, in events with
two unknown four-momenta. Central to this problem is the identification of
spin-dependent kinematic variables and the construction of... | hep-ph |
Probing New Physics with $\bar B \to ρ(770) \, \ell^- \bar ν_\ell$
and $\bar B \to a_1(1260) \, \ell^- \bar ν_\ell$: The $B$ meson semileptonic modes to $\rho(770)$ and $a_1 (1260)$ are useful
to pin down possible non Standard Model effects. The 4d differential $\bar B
\to \rho(\pi \pi) \ell^- \bar \nu_\ell$ and $ \b... | hep-ph |
Dark Matter Phenomenology: I review recent developments in the direct and indirect detection of dark
matter and new candidates beyond the WIMP paradigm. | hep-ph |
Extra $Z^\prime$s and $W^\prime$s in Heterotic--String Derived Models: The ATLAS collaboration recently recorded possible excess in the di--boson
production at the di--boson invariant mass at around 2 TeV. Such an excess may
be produced if there exist additional $Z^\prime$ and/or $W^\prime$ at that
scale. We survey the... | hep-ph |
The evolution of parton distributions beyond leading order: the singlet
case: A complete description of the calculation of anomalous dimensions (GLAP
splitting functions) is given for parton distributions which appear in
space-like processes. The calculation is performed in the light-cone gauge. The
results are in ag... | hep-ph |
The AdS/CFT Correspondence and Light-Front QCD: We identify an invariant light-front coordinate $\zeta$ which allows the
separation of the dynamics of quark and gluon binding from the kinematics of
constituent spin and internal orbital angular momentum. The result is a
single-variable light-front Schrodinger equation f... | hep-ph |
Mass Measurement in Boosted Decay Chains with Missing Energy: We explore a novel method of mass reconstruction in events with missing
transverse momentum at hadron colliders. In events with sizeable boost factors
in the final steps of dual multi-stage decay chains, the missing energy
particles may each be approximately... | hep-ph |
Infrared Effects of Ultraviolet Operators on Dark Matter Freeze-In: Dark matter (DM) that interacts too weakly with the Standard Model (SM) to
reach full thermodynamic equilibrium can be still be created in significant
amounts by rare SM collisions. This mechanism, called freeze-in, can proceed
through a renormalizable... | hep-ph |
Gravitational Lensing and Extra Dimensions: We study gravitational lensing and the bending of light in low energy scale
(M_S) gravity theories with extra space-time dimensions n. We find that due to
the presence of spin-2 Kaluza-Klein states from compactification, a correction
to the deflection angle with a strong quad... | hep-ph |
epsilon'/epsilon and Chiral Dynamics: The long-distance contributions to $K\to 2\pi$ amplitudes can be pinned down,
using well established Chiral Perturbation Theory techniques. The strong
S--wave rescattering of the two final pions generates sizeable chiral loop
corrections, which have an important impact on the direc... | hep-ph |
$B{\bar B}$ angular correlations at the LHC in parton Reggeization
approach merged with higher-order matrix elements: We calculate the angular distribution spectra between beauty ($B$) and
anti-beauty ($\bar B$) mesons in proton-proton collisions in the leading order
approximation of the parton Reggeization approach ... | hep-ph |
Coherent States in High-Energy Physics: The amplitude for emitting $n$ bosons factorizes into the product of $n$
single-boson emission amplitudes, if the source is energetic and abelian. If it
is energetic but {\it non-abelian}, the amplitude is given by a sum of
factorized {\it quasi-particle} amplitudes. A quasi-part... | hep-ph |
Nucleon-Nucleon Interaction and Isospin Violation: The application of the chiral effective theory to processes with two or more
nucleons is discussed. We gain a qualitative understanding of the gross
features of nuclear physics and quantitative, testable postdictions and
predictions involving photons and pions. | hep-ph |
Neutrino's Non-Standard Interactions; Another Eel under a Willow?: I report some progress that occurred since NO-VE08 in the field of
non-standard interactions (NSI) of neutrinos. After briefly reviewing
theoretical developments, I give a summary of the two works in which I was
involved. Firstly, we have formulated a p... | hep-ph |
More Energy, More Searches, but the pMSSM Lives On: We further examine the capability of the 7 and 8 TeV LHC to explore the
parameter space of the p(henomenological)MSSM with neutralino LSPs. Here we
present an updated study employing all of the relevant ATLAS SUSY analyses, as
well as all relevant LHC non-MET searches... | hep-ph |
Quantum Mechanics with Neutral Kaons: We briefly illustrate a few tests of quantum mechanics which can be performed
with entangled neutral kaon pairs at a Phi-factory. This includes a
quantitative formulation of Bohr's complementarity principle, the quantum
eraser phenomenon and various forms of Bell inequalities. | hep-ph |
Effect of CP violation in the singlet-doublet dark matter model: We revisit the singlet-doublet dark matter model with a special emphasis on
the effect of CP violation on the dark matter phenomenology. The CP violation
in the dark sector induces a pseudoscalar interaction of a fermionic dark
matter candidate with the S... | hep-ph |
Measuring C-odd correlations at lepton-proton and photon-proton
collisions: We consider the charge-odd correlations (COC) in cross sections of processes
of production of charged particles. The cases of a muonic pair and pion systems
$\pi^{+}\pi^{-},\pi^{+}\pi^{-}\pi^{0}$ are considered in detail for
electron-proton o... | hep-ph |
Cosmological Phase Transition of Spontaneous Confinement: The dynamics of a cosmological (de)confinement phase transition is studied in
nearly conformally invariant field theories, where confinement is predominantly
spontaneously generated and associated with a light "dilaton" field. We show
how the leading contributio... | hep-ph |
Division algebraic symmetry breaking: Reframing certain well-known particle models in terms of normed division
algebras leads to two new results for BSM physics.
(1) We identify a sequence of complex structures which induces a cascade of
breaking symmetries: Spin(10) $\mapsto$ Pati-Salam $\mapsto$ Left-Right
symmetri... | hep-ph |
On the Character of Leading Asymmetry in the Hadroproduction of Charmed
Mesons and Baryons: The character of asymmetry between the spectra of Lambda_c and antiLambda_c
in the E781 experiment (FNAL) is discussed on the basis of the Quark Gluon
String Model(QGSM). As it was shown in the description of the asymmetry bet... | hep-ph |
QCD corrections to longitudinal spin asymmetries in $W^\pm$-boson
production at RHIC: The polarized antiquark distributions in the proton can be measured by
studying spin asymmetries in vector boson production in longitudinally
polarized proton-proton collisions. The STAR and PHENIX experiments at BNL RHIC
have repor... | hep-ph |
Pion structure function at small x from DIS data: Production of leading neutrons in DIS is usually considered as a tool to
measure the pion structure function at small x accessible at HERA. The main
obstacle is the lack of reliable evaluations of the absorption corrections,
which significantly suppress the cross sectio... | hep-ph |
SU(3) Chiral Dynamics with Coupled Channels: Eta and Kaon
Photoproduction: We identify the leading s-wave amplitudes of the SU(3) chiral meson-baryon
Lagrangian with an effective coupled-channel potential which is iterated in a
Lippmann-Schwinger equation. The strangeness $S=-1$ resonance $\Lambda(1405)$
and the $S_{... | hep-ph |
Meson loop effect on high density chiral phase transition: We test the stability of the mean-field solution in the Nambu--Jona-Lasinio
model. For stable solutions with respect to both the \sigma and \pi directions,
we investigate effects of the mesonic loop corrections of 1/N_c, which
correspond to the next-to-leading ... | hep-ph |
Study of $Λ_b\to Λ(φ,η^{(\prime)})$ and $Λ_b\to
ΛK^+K^-$ decays: We study the charmless two-body $\Lambda_b\to \Lambda (\phi,\eta^{(\prime)})$
and three-body $\Lambda_b\to \Lambda K^+K^- $ decays. We obtain ${\cal
B}(\Lambda_b\to \Lambda\phi)=(3.53\pm 0.24)\times 10^{-6}$ to agree with the
recent LHCb measurement. Ho... | hep-ph |
Note on Custodial Symmetry in the Two-Higgs-Doublet Model: We present a simple and transparent method to study custodial symmetry in the
Two-Higgs-Doublet Model. The method allows to formulate the basis independent,
sufficient and necessary, conditions for the custodial symmetry of the scalar
potential. The relation be... | hep-ph |
A Remark on A Remark on Neutrino Oscillations Observed in KamLAND
Experiment: It is shown that equal magnitudes of the transitions $\bar \nu_e \to \bar
\nu_{\mu}$ and $\bar \nu_e \to \bar \nu_{\tau}$ in the disappearance of reactor
$\bar \nu_e$ discovered in the KamLAND experiment just follows at
$\theta_{23}=\pi/4$ ... | hep-ph |
Curvature-Restored Gauge Invariance and Ultraviolet Naturalness: It is shown that, $(a \Lambda^2 + b |H|^2)R$ in a spacetime of curvature $R$
is a natural ultraviolet $(U\!V)$ completion of $(a \Lambda^4 + b \Lambda^2
|H|^2)$ in the flat-spacetime Standard Model $(S\!M)$ with Higgs field $H$,
$U\!V$ scale $\Lambda$ and... | hep-ph |
Spontaneous Symmetry Breaking and Chiral Symmetry: In this introductory lecture, some basic features of the spontaneous symmetry
breaking are discussed. More specifically, $\sigma $-model, non-linear
realization, and some examples of spontaneous symmetry breaking in the
non-relativistic system are discussed in details.... | hep-ph |
Deconstructing 5-D QED: We discuss periodic compactification and latticization of a 5-D U(1) theory
with a Dirac fermion, yielding a 1+3 effective theory. We address subtleties in
the lattice fermionic action,such as fermion doubling and the Wilson term. We
compute the Coleman-Weinberg potential for the Wilson line whi... | hep-ph |
Role of beam polarization in the determination of $WWγ$ and $WWZ$
couplings from $e^+e^-\to W^+W^-$: We evaluate the constraints on anomalous trilinear gauge-boson couplings that
can be obtained from the study of electron-positron annihilation into $W$ pairs
at a facility with either the electron beam longitudinally ... | hep-ph |
Heavy quarks at RHIC and LHC within a partonic transport model: Production and space-time evolution of heavy quarks in central and
non-central heavy-ion collisions at RHIC and LHC are studied with the partonic
transport model Boltzmann Approach of MultiParton Scatterings (BAMPS). In
addition to the initially created he... | hep-ph |
CMB imprints of high scale non-thermal leptogenesis: We study the imprints of high scale non-thermal leptogenesis on cosmic
microwave background (CMB) from the measurements of inflationary spectral index
($n_s$) and tensor-to-scalar ratio ($r$), which otherwise is inaccessible to
the conventional laboratory experiments... | hep-ph |
Probing Charged Higgs Bosons in the 2-Higgs Doublet Model Type-II with
Vector-Like Quarks: We study the phenomenology of charged Higgs bosons ($H^\pm$) and Vector-Like
Quarks (VLQs), denoted as $T$, the latter possessing a charge identical to the
top quark one, within the framework of the Two Higgs Doublet Model Type... | hep-ph |
Chiral Restoration in the Early Universe: Pion Halo in the Sky: < \psibarpsi > vanishing above $T_c$ indicates chiral symmetry restoration at
high $T$. But is it the old $T=0$ chiral symmetry that is `restored'? In this
talk, I report on the spacetime quantization of the BPFTW effective action for
quarks in a hot envir... | hep-ph |
Studying the production mechanisms of light meson resonances in two-pion
photoproduction: a Regge approach: A calculation of the angular moments of two-pion photoproduction is
presented. The underlying theoretical model encodes the prominent $\rho(770)$
resonance and the expected leading background contribution comin... | hep-ph |
Probing general $U(1)'$ models with non-universal lepton charges at
FASER/FASER2, COHERENT and long-baseline oscillation experiments: The general anomaly-free $U(1)'$ models allow non-universal lepton charges.
We explore the sensitivities of FASER/FASER2, COHERENT and DUNE/T2HK precision
experiments to the new gauge ... | hep-ph |
Theoretical Expectations for the Muon's Electric Dipole Moment: We examine the muon's electric dipole moment $\dmu$ from a variety of
theoretical perspectives. We point out that the reported deviation in the
muon's g-2 can be due partially or even entirely to a new physics contribution
to the muon's {\em electric} dipo... | hep-ph |
Theory of Small $x$ Deep Inelastic Scattering NLO Evaluations, and low
$Q^2$ Analysis: We calculate structure functions at small $x$ both under the assumption of a
hard singularity (a power behaviour $x^{-\lambda}, \lambda$ positive, for
$x\rightarrow 0$) or that of a soft-Pomeron dominated behaviour, also called
dou... | hep-ph |
Supersymmetric SU(3) X U(1) Gauge Model: Higgs Structure at the
Electroweak Scale: We consider a supersymmetric version of the recently proposed SU(3) X U(1)
extended gauge model. We show that it is possible to have only two Higgs
doublets at the SU(2) X U(1) energy scale but they are not those of the minimal
supersy... | hep-ph |
Tests of Lorentz symmetry: A number of approaches to fundamental physics can lead to the violation of
Lorentz and CPT symmetry. This talk discusses the low-energy phenomenology
associated with such effects and reviews various sample experiments within this
context. | hep-ph |
Properties of excited charmed-bottom mesons: We calculate the spectrum of $B_c$ mesons using a non-relativistic quark
potential model. Using the calculated wave functions, we compute the radiative
widths of $B_c$ excited states. The strong decay widths are calculated in a
modified $^3P_0$ model, assuming harmonic oscil... | hep-ph |
Radiative corrections to $h^0\to WW^*/ZZ^*\to 4$\,leptons in the MSSM: The electroweak $\mc O(\alpha)$ radiative corrections to the decay of the
lightest MSSM Higgs boson to four leptons are presented, improved by the
two-loop corrections provided by the program package FeynHiggs. We also analyze
the results in the dec... | hep-ph |
Thermodynamic instabilities in dynamical quark models with complex
conjugate mass poles: We show that the CJT thermodynamic potential of dynamical quark models with a
quark propagator represented by complex conjugate mass poles inevitably
exhibits thermodynamic instabilities. We find that the minimal coupling of the
... | hep-ph |
The LHCb pentaquark as a $\bar{D}^*Σ_c-\bar{D}^*Σ_c^*$
molecular state: We perform a theoretical analysis of the $\Lambda_b \to J/\psi K^- p$
reaction from where a recent LHCb experiment extracts a $\Lambda(1405)$
contribution in the $K^- p$ spectrum close to threshold and two baryon states
of hidden charm in the $J/... | hep-ph |
Next-to-Leading-Order Corrections to the Production of Heavy-Flavour
Jets in e+e- Collisions: In this thesis we describe the calculation of the process e+ e- --> Z/gamma
-> Q Qbar + X, where Q is a heavy quark, X is anything else at order alpha_s^2. | hep-ph |
Sun Heated MeV-scale Dark Matter and the XENON1T Electron Recoil Excess: The XENON1T collaboration reported an excess of the low-energy electron
recoil events between 1 and 7 keV. We explore the possibility to explain such
an anomaly by the MeV-scale dark matter (DM) heated by the interior of the Sun
due to the same DM... | hep-ph |
Fast neutrino flavor conversions near the supernova core with realistic
flavor-dependent angular distributions: It has been recently pointed out that neutrino fluxes from a supernova can
show substantial flavor conversions almost immediately above the core. Using
linear stability analyses and numerical solutions of t... | hep-ph |
Supernova Bounds on Neutrino Properties: a mini-review: This talk summarizes our recent work which studied the impact of resonant
neutrino conversion induced by some non-standard neutrino properties beyond
mass and mixing, such as neutrino magnetic moment, lepton-flavor
non-universality as well as flavor changing neutr... | hep-ph |
g_μ- 2 in Supersymmetry: The 2.6 sigma deviation in the muon's anomalous magnetic moment has strong
implications for supersymmetry. In the most model-independent analysis to date,
we consider gaugino masses with arbitrary magnitude and phase, and sleptons
with arbitrary masses and left-right mixings. For tan(beta)=50, ... | hep-ph |
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