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Non-abelian color dielectric - towards the effective model of the low
energy QCD: Lattice motivated triplet color scalar field theory is analyzed. We consider
non-minimal as well as covariant derivative coupling with SU(2) gauge fields.
Field configurations generated by external electric sources are presented.
Moreov... | hep-ph |
Lambda(1520) photoproduciton off the proton target with Regge
contributions: We investigate the Lambda(1520,3/2^-)=Lambda* photoproduction off the proton
target with the Regge contributions to go beyond the resonance region, in
addition to the tree-level Born terms consisting of the s, t, and u channels,
and contact ... | hep-ph |
Precision Theory of Electroweak Interactions: As a part of the celebration of 50 years of the Standard Model of particle
physics, I present a brief history of the precision theory of electroweak
interactions. I emphasize in particular the theoretical preparations for the
LEP program and the prediction of m_t and m_h fr... | hep-ph |
Bounds on TeV Seesaw Models from LHC Higgs Data: We derive bounds on the Dirac Yukawa couplings of the neutrinos in seesaw
models using the recent Large Hadron Collider (LHC) data on Higgs decays for
the case where the Standard Model singlet heavy leptons needed for the seesaw
mechanism have masses in the 100 GeV range... | hep-ph |
Delicate interplay between the D0-D*0, rho0-J/psi, and omega-J/psi
channels in the X(3872) resonance: The nature of the X(3872) enhancement is analysed in the framework of the
Resonance-Spectrum Expansion, by studying it as a regular $J^{PC}=1^{++}$
charmonium state, though strongly influenced and shifted by open-cha... | hep-ph |
High-p_T Pion Quenching versus anti+Baryon Enhancement in
Nucleus-Nucleus Collisions: Jet quenching of quarks and gluons in central A+A collisions suppresses the
high-p_T meson production and exposes novel baryon dynamics that we attribute
to (gluonic) baryon junctions. This mechanism predicts baryon enhancement in a... | hep-ph |
High-energy neutrino deeply inelastic scattering cross sections from 100
GeV to 1000 EeV: We present a state-of-the-art prediction for cross sections of neutrino
deeply inelastic scattering (DIS) from nucleon at high neutrino energies,
$E_\nu$, from 100 GeV to 1000 EeV ($10^{12}$ GeV). Our calculations are based
on t... | hep-ph |
A proposal for improving the hadronization of QCD currents in TAUOLA: After overviewing the general features of semileptonic decays of the tau
lepton, I will recall the most widely used model for them, namely that of
Kuhn-Santamaria (KS), and I will explain the subsequent works that were done
along these lines and that... | hep-ph |
The $ΔS=1$ Effective Hamiltonian Including Next-to-Leading Order
QCD and QED Corrections: In this paper we present a calculation of the $\Delta S=1$ effective weak
Hamiltonian including next-to-leading order QCD and QED corrections. At a scale
$\mu$ of the order of few GeV, the Wilson coefficients of the operators ar... | hep-ph |
Neutral pion decay in dense skyrmion matter: We study the density dependence of the decay $\pi^0\to \gamma \gamma$ using
the Skyrme Lagrangian to describe simultaneously both the matter background and
mesonic fluctuations. Pion properties such as mass and decay constant are
modified by the medium. This leads to large s... | hep-ph |
One-Loop N Gluon Amplitudes with Maximal Helicity Violation via
Collinear Limits: We present a conjecture for the $n$-gluon one-loop amplitudes with maximal
helicity violation. The conjecture emerges from the powerful requirement that
the amplitudes have the correct behavior in the collinear limits of external
moment... | hep-ph |
Heavy-flavor effects in soft gluon resummation for electroweak boson
production at hadron colliders: We evaluate the impact of heavy-quark masses on transverse momentum
distributions of W, Z, and supersymmetric neutral Higgs bosons at the Tevatron
and LHC. The masses of charm and bottom quarks act as non-negligible m... | hep-ph |
Beam polarization effects on top-pair production at the ILC: Full one-loop electroweak-corrections for an $e^-e^+\rightarrow t \bar{t}$
process associated with sequential $t\rightarrow b \mu\nu_\mu$ decay are
discussed. At the one-loop level, the spin-polarization effects of the initial
electron and positron beams are ... | hep-ph |
Electroweak Physics at HERA: Introduction and Summary: A high luminosity upgrade of HERA will allow the measurement of standard
model parameters and the neutral current couplings of quarks. These results
will have to be consistent with other precision measurements or indicate traces
of new physics. The analysis of $W$ ... | hep-ph |
New light on WW scattering at the LHC with W jet tagging: After the recent discovery of a 125 GeV Higgs-like particle at the Large
Hadron Collider (LHC), it is crucial to examine its role in unitarizing high
energy W_LW_L scattering, which may reveal its possible deviation from a
Standard Model Higgs. We perform an upd... | hep-ph |
Probing Majorana neutrinos in rare K and D, D_s, B, B_c meson decays: We study lepton number violating decays of charged K, D, D_s, B and B_c
mesons of the form M^+\to {M'}^-\ell^+\ell^+, induced by the existence of
Majorana neutrinos. These processes provide information complementary to
neutrinoless double nuclear bet... | hep-ph |
Structures of Neutrino Flavor Mixing Matrix and Neutrino Oscillations at
CHORUS and NOMAD: We have studied structures of the neutrino flavor mixing matrix focusing on
the neutrino oscillations at CHORUS and NOMAD as well as the one at LSND(or
KARMEN). We have assumed two typical neutrino mass hierarchies $m_3\simeq
m... | hep-ph |
An analysis of Precision Electroweak Measurements: Summer 98 Update: We update our analysis of precision electroweak measurements using the latest
data announced at Moriond, March 1998. Possible oblique corrections from new
physics are parametrized using the STU formalism of Ref.[1], and non-oblique
corrections to the ... | hep-ph |
Progress in the Theory of the Electroweak Phase Transition: Recent progress in the theory of the electroweak phase transition is
discussed. For the Higgs boson mass smaller than the masses of W and Z bosons,
the phase transition is of the first order. However, its strength is
approximately 2/3 times less than what foll... | hep-ph |
Reconciling the nonrelativistic QCD prediction and the $J/ψ\to
3γ$ data: It has been a long-standing problem that the rare electromagnetic decay
process $J/\psi\to 3\gamma$ is plagued with both large and negative radiative
and relativistic corrections. To date it remains futile to make a definite
prediction to confro... | hep-ph |
MSSM Constraints from Higgs Boson Searches: The LEP era has brought immense progress in searches for Higgs bosons over
the last 12 years which will guide searches at future colliders. The evolution
of the Higgs boson mass limits are reviewed with the focus on results from
general parameter scans in the Minimal Supersym... | hep-ph |
Classical Gluon Production Amplitude for Nucleus-Nucleus Collisions:
First Saturation Correction in the Projectile: We calculate the classical single-gluon production amplitude in
nucleus-nucleus collisions including the first saturation correction in one of
the nuclei (the projectile) while keeping multiple-rescatte... | hep-ph |
The Simplest Models of Radiative Neutrino Mass: Excluding Simplified Zee
Models and Beyond: The complexity of radiative neutrino-mass models can be judged by: (i)
whether they require the imposition of ad hoc symmetries, (ii) the number of
new multiplets they introduce, and (iii) the number of arbitrary parameters
th... | hep-ph |
Curvature Perturbation from Supersymmetric Flat Directions: We show that a contribution to the total curvature perturbation may be due to
the presence of flat directions in supersymmetric models. It is generated at
the first os- cillation of the flat direction condensate when the latter
relaxes to the minimum of its po... | hep-ph |
QCD correction to gluino decay to $t\bar{t}\tildeχ^0_1$ in the MSSM: We calculate the complete next-to-leading order QCD corrections to the
three-body decay of gluino into top-pair associated with a lightest neutralino
in the minimal supersymmetric standard model. We obtain that the LO and NLO QCD
corrected decay width... | hep-ph |
Consistency of Gauged Two Higgs Doublet Model: Gauge Sector: We study the constraints on the new parameters in the gauge sector of gauged
two Higgs doublet model using the electroweak precision test data collected
from the Large Electron Positron Collider (LEP) at and off the Z-pole as well
as the current Drell-Yan and... | hep-ph |
Wandzura-Wilczek approximation for the twist-3 DVCS amplitude: We present a derivation of Wandzura-Wilczek (WW) like relations for skewed
parton distributions. It is demonstrated for photon-pion scattering that the
skewed twist-3 parton distributions contributing to the DVCS amplitude have
discontinuities at the points... | hep-ph |
New effective treatment of the light-front nonvalence contribution in
timelike exclusive processes: We discuss a necessary nonvalence contribution in timelike exclusive
processes. Following a Schwinger-Dyson type of approach, we relate the
nonvalence contribution to an ordinary light-front wave function that has been... | hep-ph |
Relic neutrino asymmetries and big bang nucleosynthesis in a four
neutrino model: Oscillations between ordinary and sterile neutrinos can generate large
neutrino asymmetries in the early universe. These asymmetries can significantly
affect big bang nucleosynthesis (BBN) through modification of nuclear reaction
rates.... | hep-ph |
Gauge dependence of the quark gap equation: an exploratory study: We study the gauge dependence of the quark propagator in quantum
chromodynamics by solving the gap equation with a nonperturbative quark-gluon
vertex which is constrained by longitudinal and transverse Slavnov-Taylor
identities, the discrete charge conju... | hep-ph |
The LPM Effect in sequential bremsstrahlung: $1/N_c^2$ corrections: An important question concerning in-medium high-energy parton showers in a
quark-gluon plasma or other QCD medium is whether consecutive splittings of the
partons in a given shower can be treated as quantum mechanically independent,
or whether the form... | hep-ph |
Forward Compton Scattering, using Real Analytic Amplitudes: We analyze forward Compton scattering, using real analytic amplitudes. By
fitting the total \gamma p scattering cross section data in the high energy
region 5 GeV < \sqrt s < 20 GeV, using a cross section rising as \ln^2 s, we
calculate \rho_{\gamma p}, the ra... | hep-ph |
The production of the doubly charmed baryon in deeply inelastic $ep$
scattering at the Large Hadron Electron Collider: In this paper, we carry out a detailed study on the production of the doubly
charmed baryon in deeply inelastic $ep$ scattering (DIS) for $Q^2\in[2,
100]~\textrm{GeV}^2$, at the Large Hadron Electron... | hep-ph |
Master Integrals for Inclusive Weak Decays of Heavy Flavours at
Next-to-Leading Order: We present analytical results for master integrals emerging in the
computation of differential rates for inclusive weak decays of heavy flavors at
next-to-leading order (NLO) in QCD. As an immediate physical application, these
mast... | hep-ph |
Elastic and transition form factors of light pseudoscalar mesons from
QCD sum rules: We revisit $F_\pi(Q^2)$ and $F_{P\gamma}(Q^2)$, $P=\pi,\eta,\eta'$, making
use of the local-duality (LD) version of QCD sum rules. We give arguments, that
the LD sum rule provides reliable predictions for these form factors at $Q^2
\... | hep-ph |
Higher Twist Distribution Amplitudes of the Nucleon in QCD: We present the first systematic study of higher-twist light-cone distribution
amplitudes of the nucleon in QCD. We find that the valence three-quark state is
described at small transverse separations by eight independent distribution
amplitudes. One of them is... | hep-ph |
Baryon number non-conservation as Peccei-Quinn mechanism: Baryon number is an accidental symmetry in the standard model, while
Peccei-Quinn symmetry is hypothetical symmetry which is introduced to solve the
strong CP problem. We study the possible connections between Peccei-Quinn
symmetry and baryon number symmetry. In... | hep-ph |
The Electroweak Phase Transition at $m_H \simeq m_W$: We study the finite temperature electroweak transition with non-perturbative
lattice Monte Carlo simulations. We find that it is of first order, at least
for Higgs masses up to 80 GeV. The critical temperature of the phase transition
is found to be smaller than that... | hep-ph |
Higgs-gauge unification without tadpoles: In orbifold gauge theories localized tadpoles can be radiatively generated at
the fixed points where U(1) subgroups are conserved. If the Standard Model
Higgs fields are identified with internal components of the bulk gauge fields
(Higgs-gauge unification) in the presence of th... | hep-ph |
Scalar field couplings to quadratic curvature and decay into gravitons: Any field, even if it lives in a completely hidden sector, interacts with the
visible sector at least via the gravitational interaction. In this paper, we
show that a scalar field in such a hidden sector generically couples to the
quadratic curvatu... | hep-ph |
Search for Physics Beyond the Standard Model: We survey some recent ideas and progress in looking for particle physics
beyond the Standard Model, connected by the theme of Supersymmetry (SUSY). We
review the success of SUSY-GUT models, the expected experimental signatures and
present limits on SUSY partner particles, a... | hep-ph |
Probing the QCD Equation of State: We propose a novel quasiparticle interpretation of the equation of state of
deconfined QCD at finite temperature. Using appropriate thermal masses, we
introduce a phenomenological parametrisation of the onset of confinement in the
vicinity of the phase transition. Lattice results of b... | hep-ph |
The High Density Parton Dynamics from Eikonal and Dipole Pictures: In this contribution we discuss distinct approaches for the high density QCD
(hdQCD) and the demonstration of the equivalence between the AGL approach and
the K approach is presented. Our conclusion is that the AGL equation is a good
candidate for an un... | hep-ph |
Approximate degeneracy of heavy-light mesons with the same $L$: Careful observation of the experimental spectra of heavy-light mesons tells
us that heavy-light mesons with the same angular momentum $L$ are almost
degenerate. The estimate is given how much this degeneracy is broken in our
relativistic potential model, a... | hep-ph |
Atlas of solar hidden photon emission: Hidden photons, gauge bosons of a U(1) symmetry of a hidden sector, can
constitute the dark matter of the universe and a smoking gun for large volume
compactifications of string theory. In the sub-eV mass range, a possible
discovery experiment consists on searching the copious flu... | hep-ph |
Twist expansion of the nucleon structure functions, F2 and FL, in the
DGLAP improved saturation model: Higher twist effects in the deeply inelastic scattering are studied. We start
with a short review of the theoretical results on higher twists in QCD. Within
the saturation model we perform a twist analysis of the nu... | hep-ph |
Hadron production in non linear relativistic mean field models: By using a parametrization of the non-linear Walecka model which takes into
account the binding energy of different hyperons, we present a study of
particle production yields measured in central Au-Au collision at RHIC. Two
sets of different hyperon-meson ... | hep-ph |
The ttbar threshold at a muon collider: The beam energy spread is a major issue in future attempts to study the
$t\overline{t}$ threshold at $e^+e^-$ colliders. Muon colliders are expected to
naturally have narrow band beams making them an ideal place to study the
excitation curve. We present the parameter determinatio... | hep-ph |
Hadron Resonance Gas Model with Induced Surface Tension: Here we present a physically transparent generalization of the multicomponent
Van der Waals equation of state in the grand canonical ensemble. For the
one-component case the third and fourth virial coefficients are calculated
analytically. It is shown that an adj... | hep-ph |
Nongauge antisymmetric-tensor bosons mediating interactions in the
hidden sector: In a recent work, we have constructed a model of hidden sector of the
Universe, consisting of sterile spin-1/2 Dirac fermions ("sterinos"), sterile
spin-0 bosons ("sterons") conjectured to get spontaneously nonzero vacuum
expectation va... | hep-ph |
Probing neutrino masses with future galaxy redshift surveys: We perform a new study of future sensitivities of galaxy redshift surveys to
the free-streaming effect caused by neutrino masses, adding the information on
cosmological parameters from measurements of primary anisotropies of the cosmic
microwave background (C... | hep-ph |
Searching for a New Source(s) of T-Violation in Spin Dependent Total
Cross Section Measurements: We first re-prove with a more complete method that the the minimum standard
model, with the inclusion of the CKM-matrix, requires the T-odd/P-odd total
cross section of two spin-1/2 particles to vanish in all orders\cite{... | hep-ph |
Studies of the ambient light of deep Baikal waters with Baikal-GVD: The Baikal-GVD neutrino detector is a deep-underwater neutrino telescope
under construction and recently after the winter 2023 deployment it consists of
3456 optical modules attached on 96 vertical strings. This 3-dimensional array
of photo-sensors all... | hep-ph |
Right-handed current contributions in B -> K pi decays: We reexamine the right-handed current effects in $b \to s$ transitions in
nonmanifest left-right models. Using the effective Hamiltonian approach
including all possible low-energy operators, we obtain especially the B \to K
\pi decay amplitudes including annihilat... | hep-ph |
Detecting Tau Neutrino Oscillations at PeV Energies: It is suggested that a large deep underocean (or ice) neutrino detector,
given the presence of significant numbers of neutrinos in the PeV energy range
as predicted by various models of Active Galactic Nuclei, can make unique
measurements of the properties of neutrin... | hep-ph |
Gravitational Instabilities of the Cosmic Neutrino Background with
Non-zero Lepton Number: We argue that a cosmic neutrino background that carries non-zero lepton
charge develops gravitational instabilities. Fundamentally, these instabilities
are related to the mixed gravity-lepton number anomaly. We have explicitly
... | hep-ph |
$β$-function for topologically massive gluons: We calculate the quantum corrections to the two-point function of four
dimensional topologically massive non-Abelian vector fields at one loop order
for $SU(N)$ gauge theory in Feynman-'t Hooft gauge. We calculate the beta
function of the gauge coupling constant and find t... | hep-ph |
Electroweak Physics: We review the prospects for studies in electroweak physics at the LHC. | hep-ph |
Status of Constraints on Supersymmetry: A short summary of constraints on the parameter space of supersymmetric
models is given. Experimental limits from high energy colliders, electroweak
precision data, flavor and Higgs physics, and cosmology are considered. The
main focus is on the MSSM with conserved R- and CP-pari... | hep-ph |
A novel left-right symmetric model: A novel gauge model which has a spontaneously broken parity symmetry is
constructed. The model has only 2 parameters beyond those of the standard
model. Some of the unusual implications of the model are discussed. | hep-ph |
Hard inclusive production and a violation of the factorization theorem: A new mechanism for hard inclusive production, which leads to a violation of
the factorization theorem, is suggested. The mechanism is illustrated by a
detailed discussion of Higgs meson production in high energy deutron-deutron
scattering. Numeric... | hep-ph |
Exact formulae for Higgs production through e gamma --> e H in the
non-linear R_ξgauge: We study the production of the SM Higgs boson (H^0) at future e gamma
colliders, through the reaction e gamma --> e H^0. The amplitude is evaluated
using the non-linear R_\xi gauge, which greatly simplifies the calculation.
Comple... | hep-ph |
Slepton pair production at the LHC in NLO+NLL with resummation-improved
parton densities: Novel PDFs taking into account resummation-improved matrix elements, albeit
only in the fit of a reduced data set, allow for consistent NLO+NLL
calculations of slepton pair production at the LHC. We apply a factorisation
method ... | hep-ph |
Gauge Coupling Unification in Gauge-Higgs Grand Unification: We discuss renormalization group equations for gauge coupling constants in
gauge-Higgs grand unification on five-dimensional Randall-Sundrum warped space.
We show that all the four-dimensional Standard Model gauge coupling constants
are asymptotically free an... | hep-ph |
μ-τSymmetry and Maximal CP Violation: We argue the possibility that a real part of a flavor neutrino mass matrix
only respects a mu-tau symmetry. This possibility is shown to be extended to
more general case with a phase parameter \theta, where the mu-tau symmetric
part has a phase of \theta/2. This texture shows maxim... | hep-ph |
Low-Scale Leptogenesis and the Domain Wall Problem in Models with
Discrete Flavor Symmetries: We propose a new mechanism for leptogenesis, which is naturally realized in
some models with a flavor symmetry based on the discrete group A_4, where the
symmetry breaking parameter also controls the Majorana masses for the ... | hep-ph |
Overview of Neutrino Mixing Models and Ways to Differentiate among Them: An overview of neutrino-mixing models is presented with emphasis on the types
of horizontal flavor and vertical family symmetries that have been invoked.
Distributions for the mixing angles of many models are displayed. Ways to
differentiate among... | hep-ph |
Hadronic Final States in DIS at NNLO QCD with Parton Showers: We present a parton-shower matched NNLO QCD calculation for hadronic final
state production in Deep Inelastic Scattering. The computation is based on the
UNLOPS method and is implemented in the publicly available event generation
framework SHERPA. Results ar... | hep-ph |
Searches for Decays of New Particles in the DUNE Multi-Purpose Near
Detector: One proposed component of the upcoming Deep Underground Neutrino Experiment
(DUNE) near detector complex is a multi-purpose, magnetized, gaseous argon time
projection chamber: the Multi-Purpose Detector (MPD). We explore the
new-physics pot... | hep-ph |
Enhanced Higgs Mass in a Gaugino Mediation Model without the Polonyi
Problem: We consider a SUSY breaking scenario without the Polonyi problem. To solve
the problem, the enhanced couplings of the Polonyi field to an inflaton, gauge
kinetic functions and itself are assumed. As a result, a gaugino mediated SUSY
breakin... | hep-ph |
Mass Spectra of $D$, $D_s$ Mesons using Dirac formalism with martin-like
confinement potential: We have calculated mass spectra of $D$, $D_s$ mesons using Dirac formalism
with Martin-like potential in Potential model. | hep-ph |
Matter Effects on Long Baseline Neutrino Oscillation Experiments: We calculate matter effects on neutrino oscillations relevant for long
baseline neutrino oscillation experiments. In particular, we compare the
results obtained with simplifying approximations for the density profile in the
Earth versus results obtained ... | hep-ph |
On the Nature of X(4260): We study the property of $X(4260)$ resonance by re-analyzing all experimental
data available, especially the $e^+e^- \rightarrow
J/\psi\,\pi^+\pi^-,\,\,\,\omega\chi_{c0}$ cross section data. The final state
interactions of the $\pi\pi$, $K\bar K$ couple channel system are also taken
into accou... | hep-ph |
Muon conversion to electron in nuclei within the BLMSSM: In a supersymmetric extension of the standard model with local gauged baryon
and lepton numbers (BLMSSM), there are new sources for lepton flavor violation,
because the right-handed neutrinos, new gauginos and Higgs are introduced. We
investigate muon conversion ... | hep-ph |
Next-to-leading order QCD corrections to the top quark decay via
model-independent FCNC couplings: D0 and CDF collaborations at the Fermilab Tevatron have searched for
non-standard-model single top-quark production and set upper limits on the
anomalous top quark flavor-changing neutral current (FCNC) couplings
$\kapp... | hep-ph |
Curvature and thermal corrections in tree-level CPT-Violating
Leptogenesis: In a model for leptogenesis based on spontaneous breaking of Lorentz and CPT
symmetry [1-3], we examine the consistency of using the approximation of
plane-wave solutions for a free spin-(1/2) Dirac (or Majorana) fermion field
propagating in ... | hep-ph |
Empirical regularities in the $x$--dependence of nuclear J/Psi
suppression: The measured ratios $R(x,A_1/A_2)$ for $J/\Psi$, $\Psi'$ and $\mu^+\mu^-$
production on two different targets $A_1, A_2$ as a function of the fractional
momentum $x$ of the final state are well fit with a very simple functional form
having th... | hep-ph |
Chromomagnetic dipole moment of the top quark in the Bestest Little
Higgs model: We calculate the chromomagnetic dipole moment of the top quark,
$\hat{\mu}_t$, in the context of the Bestest Little Higgs model. This extension
of the Standard Model aims to solve the hierarchy problem without fine tuning,
by introducing... | hep-ph |
Contribution of the elastic radiative tail to the deep inelastic muon
scattering on heavy targets: Improvement of the radiative correction scheme for the deep inelastic
scattering on the heavy targets is discussed. Arguments that the contribution
of the radiative tail from the elastic peak should be calculated withou... | hep-ph |
On-shell renormalisation constants including two different nonzero
masses: We present results for the effect of a second massive quark in the relation
between the pole and the minimal subtracted quark mass at the three loop level.
We also consider the analogous effect for the wave function renormalisation
constant. S... | hep-ph |
Color path-integral Monte Carlo simulations of quark-gluon plasma: Thermodynamic properties of a strongly coupled quark-gluon plasma (QGP) of
constituent quasiparticles are studied by a color path-integral Monte Carlo
simulations (CPIMC). For our simulations we have presented QGP partition
function in the form of color... | hep-ph |
Primordial Lepton Oscillations and Baryogenesis: 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 th... | hep-ph |
External-leg corrections as an origin of large logarithms: Obtaining precise theoretical predictions for both production and decay
processes of heavy new particles is of great importance to constrain the
allowed parameter spaces of Beyond-the-Standard-Model (BSM) theories, and to
properly assess the sensitivity for dis... | hep-ph |
The 2HD+a model for a combined explanation of the possible excesses in
the CDF $\mathbf{M_W}$ measurement and $\mathbf{(g-2)_μ}$ with Dark Matter: The new measurement of the $W$ boson mass performed by the CDF experiment at
the Tevatron shows a significant deviation not only with the expectation in the
Standard Model... | hep-ph |
Weak decays of doubly heavy baryons: decays to system of $π$ mesons: In the presented article we consider exclusive weak decays of doubly heavy
baryons with spin $J=1/2$ with production of leptonic pair or a set of light
mesons. Using QCD factorization theorem and spectral functions approach we
obtain theoretical predi... | hep-ph |
Light-cone distribution amplitudes of light mesons with QED effects: We discuss the generalization of the leading-twist light-cone distribution
amplitude for light mesons including QED effects. This generalization was
introduced to describe virtual collinear photon exchanges above the
strong-interaction scale $\Lambda_... | hep-ph |
Towards a determination of the tau lepton dipole moments: The tau anomalous magnetic moment (a_tau) and electric dipole moment (d_tau)
have not yet been observed. The present bounds on their values are of order
10^-2 and 10^-17 e*cm, respectively. We propose to measure a_tau with a
precision of O(10^-3) or better and i... | hep-ph |
Geometry of gauge links in operator definitions of transverse-momentum
dependent PDFs: A comparative view: Different approaches to the problem of a gauge-invariant operator definition
of transverse-momentum dependent parton densities (TMDs) are reviewed and
compared from the point of view of their compatibility with ... | hep-ph |
Exclusive nonleptonic decays of B mesons: The energetic exclusive two-body nonleptonic decays of B mesons are
investigated in the framework of the relativistic quark model within the
factorization approximation. The heavy quark expansion is used for the
calculation of form factors. The obtained results are in agrement ... | hep-ph |
Distinctive nuclear signatures of low-energy atmospheric neutrinos: New probes of neutrino mixing are needed to advance precision studies. One
promising direction is via the detection of low-energy atmospheric neutrinos
(below a few hundred MeV), to which a variety of near-term experiments will
have much-improved sensi... | hep-ph |
Charged Particle Fluctuations as a Signal of the Dynamics of Heavy Ion
Processes: Comparing proposed quantities to analyze charged particle fluctuations in
heavy ion experiments we find the dispersion of the charges in a central
rapidity box as best suited. Various energies and different nuclear sizes were
considered... | hep-ph |
Particle-accelerator constraints on isotropic modifications of the speed
of light: The absence of vacuum Cherenkov radiation for 104.5 GeV electrons and
positrons at LEP combined with the observed stability of 300 GeV photons at the
Tevatron constrains deviations of the speed of light relative to the maximal
attainab... | hep-ph |
Beyond Low-Gribov theorem for high energy interactions of scalar and
gauge particles: We obtain a generalization of the Low theorem for non-Abelian boson emission
in collision of scalar and gauge vector particles and its extension to high
energy collisions for small transverse momenta of produced particles. We
demons... | hep-ph |
Analytic representations of two-loop scattering amplitudes with internal
masses: We highlight the latest developments in computing higher-order scattering
amplitudes with massive internal propagators. The contributing Feynman
integrals often lead to special classes of functions, for example, functions
associated with... | hep-ph |
Constraining Light Mediators via Detection of Coherent Elastic Solar
Neutrino Nucleus Scattering: Dark matter (DM) direct detection experiments are entering the multiple-ton
era and will be sensitive to the coherent elastic neutrino nucleus scattering
(CE$\nu$NS) of solar neutrinos, enabling the possibility to explor... | hep-ph |
QCD Analysis of the Polarized Deep-Inelastic World Data: The results of a recent next-to-leading order QCD analysis of the world data
on polarized deep inelastic scattering are reported. New parameterizations are
derived for the quark and gluon distributions, accounting for the massive
Wilson coefficient for the charm ... | hep-ph |
HiggsSignals: Confronting arbitrary Higgs sectors with measurements at
the Tevatron and the LHC: HiggsSignals is a Fortran90 computer code that allows to test the
compatibility of Higgs sector predictions against Higgs rates and masses
measured at the LHC or the Tevatron. Arbitrary models with any number of Higgs
bos... | hep-ph |
Hybrid textures in minimal seesaw mass matrices: In the context of minimal seesaw framework, we study the implications of
Dirac and Majorana mass matrices in which two rigid properties coexist, namely,
equalities among mass matrix elements and texture zeros. In the first part of
the study, we discuss general possibilit... | hep-ph |
Boosted Dark Matter at the Deep Underground Neutrino Experiment: We investigate the detection prospects of a non-standard dark sector in the
context of boosted dark matter. We consider a scenario where two stable
particles have a large mass difference and the heavier particle accounts for
most of dark matter in our cur... | hep-ph |
Heavy-quark contributions to the ratio F_L/F_2 at low x: We study the heavy-quark contribution to the proton structure functions
F_2^i(x,Q^2) and F_L^i(x,Q^2), with i=c,b, for small values of Bjorken's x
variable at next-to-lading order and provide compact formulas for their ratios
R_i=F_L^i/F_2^i that are useful to ex... | hep-ph |
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