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Feynman rules for the rational part of the Electroweak 1-loop amplitudes: We present the complete set of Feynman rules producing the rational terms of
kind R_2 needed to perform any 1-loop calculation in the Electroweak Standard
Model. Our results are given both in the 't Hooft-Veltman and in the Four
Dimensional Helic... | hep-ph |
The $θ$-Vacua and the Leutwyler--Smilga Scaling Regime: The partition function of QCD is studied in the Leutwyler--Smilga scaling
regime for an arbitrary number of quark flavors and masses including the
contributions from all winding numbers. For $N_f=2$ and degenerate quark
masses, the partition function becomes indep... | hep-ph |
Composite Dynamics in the Early Universe: We study the occurrence of a strong first-order electroweak phase transition
in composite Higgs models. Minimal constructions realising this scenario are
based on the coset SO(6)/SO(5) which delivers an extended Higgs sector with an
additional scalar. In such models, a two-step... | hep-ph |
Study of LHC Searches for a Lepton and Many Jets: Searches for new physics in high-multiplicity events with little or no
missing energy are an important component of the LHC program, complementary to
analyses that rely on missing energy. We consider the potential reach of
searches for events with a lepton and six or mo... | hep-ph |
Distinguishing the Color Octet Axial-Vector-like Particle for Top Quark
Asymmetry via Color Flow Method at the LHC: The excess in top quark forward-backward asymmetry has been a hot topic in
recent years. Although there are many proposals to explain it, most of them can
not fit the differential distributions well. Th... | hep-ph |
Unusual condensates in quark and atomic systems: In these lectures we discuss condensates which are formed in quark matter
when it is squeezed and in a gas of fermionic atoms when it is cooled. The
behavior of these two seemingly very different systems reveals striking
similarities. In particular, in both systems the B... | hep-ph |
New extraction of CP violation in b-baryon decays: We study CP violation in b-baryon decays of $\Xi_b^- \to \Xi^- D$ with $D =
D^0, \bar{D}^0$ and $D_i~(i=1,2)$. We find that these baryonic decay processes
provide an ideal opportunity to measure the weak phase due to the absence of
the relative strong phase. Explicitly... | hep-ph |
Unification of SUSY breaking and GUT breaking: We build explicit supersymmetric unification models where grand unified gauge
symmetry breaking and supersymmetry (SUSY) breaking are caused by the same
sector. Besides, the SM-charged particles are also predicted by the symmetry
breaking sector, and they give the soft SUS... | hep-ph |
An Updated Analysis of Inert Higgs Doublet Model in light of the Recent
Results from LUX, PLANCK, AMS-02 and LHC: In light of the recent discovery by the ATLAS and CMS experiments at the
Large Hadron Collider (LHC) of a Higgs-like particle with a narrow mass range
of 125-126 GeV, we perform an updated analysis on one... | hep-ph |
Electroweak Physics: Theoretical Overview: I give an overview of the theory status of predictions for single W and Z
boson production at hadron colliders. I briefly report on work in progress for
improvements necessary to match the anticipated high precision of electroweak
measurements, such as the W mass and width, at... | hep-ph |
Generalized Friedberg-Lee model for CP violation in neutrino physics: We propose a phenomenological model of Dirac neutrino mass operator based on
the Fridberg-Lee (FL) neutrino mass model to include CP violation. By
considering the most general set of complex coefficients, and imposing the
condition that the mass eige... | hep-ph |
Direct detection rate of heavy Higgsino-like and Wino-like dark matter: A large class of viable dark matter models contain a WIMP candidate that is a
component of a new electroweak multiplet whose mass $M$ is large compared to
the electroweak scale $m_W$. A generic amplitude-level cancellation in such
models yields a s... | hep-ph |
PHOTOS Interface in C++; Technical and Physics Documentation: For five years now, PHOTOS Monte Carlo for bremsstrahlung in the decay of
particles and resonances has been available with an interface to the C++ HepMC
event record. The main purpose of the present paper is to document the
technical aspects of the PHOTOS Mo... | hep-ph |
Characteristics of Cherenkov Radiation in Naturally Occuring Ice: We revisit the theory of Cherenkov radiation in uniaxial crystals.
Historically, a number of flawed attempts have been made at explaining this
radiation phenomenon and a consistent error-free description is nowhere
available. We apply our calculation to ... | hep-ph |
Spinless Salpeter Equation: Some (Semi-) Analytical Approaches: Several techniques for deriving semianalytical bounds on the energy
eigenvalues of the spinless Salpeter equation and for estimating the quality of
the corresponding approximate eigenstates are reviewed. | hep-ph |
The Cosmological Moduli Problem and Preheating: Many models of supersymmetry breaking, in the context of either supergravity
or superstring theories, predict the presence of particles with
Planck-suppressed couplings and masses around the weak scale. These particles
are generically called moduli. The excessive producti... | hep-ph |
$0^{+}$ fully-charmed tetraquark states: Motivated by the LHCb's new observation of structures in the $J/\psi$-pair
invariant mass spectrum, for which could be classified as possible
$cc\bar{c}\bar{c}$ tetraquark candidates, we systematically study $0^{+}$
fully-charmed tetraquark states through QCD sum rules. Making t... | hep-ph |
Pomeron structure functions from HERA to Tevatron and LHC: The proton diffractive structure function $F_2^{D(3)}$ measured in the H1 and
ZEUS experiments at HERA are analysed in terms of perturbative QCD in the
perspective of the QCD extrapolation to the Tevatron and the LHC. It is shown
that both data sets can be well... | hep-ph |
Non standard neutrino interactions at LEP2 and the LHC: We consider Non-Standard neutrino Interactions (NSI) connecting two neutrinos
with two first-generation fermions ($e, u$ or $d$), which we assume to arise at
at dimension eight due to New Physics. The coefficient is normalised as $4
\epsilon G_F/\sqrt{2}$. We expl... | hep-ph |
$W$ mass in a model with vector-like leptons and $U(1)^\prime$: We study the effects of vector-like leptons on the $W$ boson mass in a model
with a vector-like $U(1)^\prime$ gauge symmetry. This model provides
simultaneous explanations for the recent anomalies in the muon anomalous
magnetic moment and the semi-leptonic... | hep-ph |
Density Fluctuations as Signature of a Non--Equilibrium First Order
Phase Transition: We show that in the presence of spinodal instabilities which develop at a
first order phase transition, the fluctuations of conserved charges can be as
strong as those at the critical end point (CEP). In particular, the net baryon
n... | hep-ph |
Precision Electroweak Data: Phenomenological Analysis: The precision electroweak program, including weak neutral current (WNC),
$Z$-pole, and high energy collider experiments, has been the primary prediction
and test of electroweak unification. It has established that the standard model
(SM) is correct and unique to fi... | hep-ph |
Analysis of the higher twist GTMD $F_{31}$ for proton in the light-front
quark-diquark model: In the light-front quark-diquark model (LFQDM), the higher twist generalized
transverse momentum dependent distribution (GTMD) $F_{31}(x, {\bf p_\perp},{\bf
\Delta_\perp})$ for the proton has been analyzed. We have derived t... | hep-ph |
Higgs boson pair production via gluon fusion at N$^3$LO in QCD: We present next-to-next-to-next-to-leading order (N$^3$LO) QCD predictions
for the Higgs boson pair production via gluon fusion at hadron colliders in the
infinite top-quark mass limit. Besides the inclusive total cross sections at
various collision energi... | hep-ph |
Strong decays of the charmed mesons $D_1^*(2680)$, $D^*_3(2760)$,
$D_2^*(3000)$: In this article, we assign the higher charmed mesons $D^*_1(2680)$,
$D_3^*(2760)$ and $D_2^*(3000)$ to be the 2S $1^-$, 1D $3^-$ and 1F $2^+$
states, respectively, and study the two-body strong decays to the ground state
charmed mesons a... | hep-ph |
Exclusive Radiative Higgs Decays as Probes of Light-Quark Yukawa
Couplings: We present a detailed analysis of the rare exclusive Higgs-boson decays into
a single vector meson and a photon and investigate the possibility of using
these processes to probe the light-quark Yukawa couplings. We work with an
effective Lagr... | hep-ph |
Ultra-high energy neutrino scattering: Estimates are made of the ultra-high energy neutrino cross sections based on
an extrapolation to very small Bjorken x of the logarithmic Froissart
dependence in x shown previously to provide an excellent fit to the measured
proton structure function F_2^p(x,Q^2) over a broad range... | hep-ph |
Constraints on cosmic-ray boosted DM in CDEX-10: Dark matter (DM) direct detection experiments have been setting strong limits
on the DM-nucleon scattering cross section at the DM mass above a few GeV, but
leave large parameter space unexplored in the low mass region. DM is likely to
be scattered and boosted by relativ... | hep-ph |
Asteroids for ultralight dark-photon dark-matter detection: Gravitational-wave (GW) detectors that monitor fluctuations in the separation
between inertial test masses (TMs) are sensitive to new forces acting on those
TMs. Ultralight dark-photon dark matter (DPDM) coupled to $U(1)_B$ or
$U(1)_{B-L}$ charges supplies one... | hep-ph |
Superluminal neutrinos in long baseline experiments and SN1987a: Precise tests of Lorentz invariance in neutrinos can be performed using long
baseline experiments such as MINOS and OPERA or neutrinos from astrophysical
sources. The MINOS collaboration reported a measurement of the muonic neutrino
velocities that hints ... | hep-ph |
Tensor susceptibilities of the vacuum from constituent quarks: We show that the constituent quark model leads to simple expressions for the
isoscalar and isovector tensor susceptibilities of the vacuum. The found values
are negative and of magnitude compatible with QCD-sum-rule parameterizations of
spectral densities i... | hep-ph |
Next-to-leading order QCD corrections to Higgs boson production in
association with a photon via weak-boson fusion at the LHC: Higgs boson production in association with a hard central photon and two
forward tagging jets is expected to provide valuable information on Higgs boson
couplings in a range where it is diffi... | hep-ph |
Theory-Data Comparisons for Jet Measurements in Hadron-Induced Processes: We present a comprehensive overview of theory-data comparisons for inclusive
jet production. Theory predictions are derived for recent parton distribution
functions and compared with jet data from different hadron-induced processes at
various cen... | hep-ph |
Potential for optimizing Higgs boson CP measurement in H to tau tau
decay at LHC and ML techniques: We investigate potential for measuring CP state of the Higgs boson in the H
to tau tau$ decay with consecutive tau-lepton decays in channels: tau^+- to
rho^+- nu_tau and tau^+- to a1^+- nu_tau combined. Subsequent deca... | hep-ph |
Some implications of lepton flavor violating processes in a
supersymmetric Type II seesaw model at TeV scale: We have conceived a supersymmetric Type II seesaw model at TeV scale, which
has some additional particles consisting of scalar and fermionic triplet Higgs
states, whose masses being around few hundred GeV. In... | hep-ph |
CP Violation Effects on $B^0_{s,d}\to \it l^+\it l^-$ in Supersymmetry
at Large $\tanβ$: An analytic analysis of the CP violating effects arising from the soft SUSY
breaking parameters on the decays $B^0_{s,d}\to \it l^+\it l^-$ at large
$\tan\beta$ is given. It is found that the phases have a strong effect on the
br... | hep-ph |
QCD$\times$QED evolution of TMDs: We consider for the first time the QED corrections to the evolution of
(un)polarized quark and gluon transverse-momentum-dependent distribution and
fragmentation functions (TMDs in general). By extending their operator
definition to QCD$\times$QED, we provide the mixed new anomalous di... | hep-ph |
Probing the gluon tomography in photoproduction of di-pions: A sizable $\cos 4\phi$ azimuthal asymmetry in exclusive di-pion production
near $\rho^0$ resonance peak in ultraperipheral heavy ion collisions recently
has been reported by STAR collaboration. We show that both elliptic gluon
Wigner distribution and final st... | hep-ph |
Almost-Goldstone Bosons from Extra-Dimensional Gauge Theories: A mechanism is presented through which very light scalar degrees of freedom
obeying the nonlinear sigma model equation can emerge in spontaneously broken
gauge theories.
The mechanism operates in extra dimensional theories in which a) there are
massless g... | hep-ph |
On nonadiabatic contributions to the neutrino oscillation probability
and the formalism by Kimura, Takamura and Yokomakura: It is shown that it is possible to obtain the analytical expression for the
effective mixing angle in matter using the formalism which was developed by
Kimura, Takamura and Yokomakura for the ne... | hep-ph |
The LHC di-photon excess and Gauge Coupling Unification in Extra
$Z^\prime$ Heterotic-String Derived Models: The di-photon excess observed at the LHC can be explained as a Standard Model
singlet that is produced and decays by heavy vector-like colour triplets and
electroweak doublets in one-loop diagrams. The charact... | hep-ph |
WIMPs during Reheating: Weakly Interacting Massive Particles (WIMPs) are among the best-motivated
dark matter candidates. In the standard scenario where the freeze-out occurs
well after the end of inflationary reheating, they are in tension with the
severe experimental constraints. Here, we investigate the thermal free... | hep-ph |
Exclusive Radiative Decays of B Mesons in QCD Factorization: We discuss exclusive radiative decays in QCD factorization within the
Standard Model. In particular, we consider the decays B -> V gamma, with a
vector meson K* or rho in the final state, and the double radiative modes B_s
-> gamma gamma and B_d -> gamma gamm... | hep-ph |
Radiative corrections to the Dalitz plot of K_{l3}^0 decays: A model-independent expression for the Dalitz plot of semileptonic decays of
neutral kaons, K_{l3}^0, including radiative corrections to order
(\alpha/\pi)(q/M_1), where q is the momentum transfer and M_1 is the mass of
the kaon, is presented. The model depen... | hep-ph |
Ansatz for small FCNC with a non-universal $Z^\prime$: It is well known that a non-universal $Z^\prime$ induces tree-level FCNC
which are severely constrained by experiment, most notably meson mixing. We
point out that there is a class of models, with a down-quark mass matrix of the
Georgi-Jarlskog form, in which the F... | hep-ph |
The Dualized Standard Model and its Applications---an Interim Report: Based on a nonabelian generalization of electric-magnetic duality, the
Dualized Standard Model (DSM) suggests a natural explanation for exactly 3
generations of fermions as the `dual colour' $\widetilde{SU}(3)$ symmetry
broken in a particular manner.... | hep-ph |
NOvA and T2K: The race for the neutrino mass hierarchy: The determination of the ordering of the neutrino masses (the hierarchy) is
probably a crucial prerequisite to understand the origin of lepton masses and
mixings and to establish their relationship to the analogous properties in the
quark sector. Here, we follow a... | hep-ph |
A rotating string model versus baryon spectra: We continue our program of describing hadrons as rotating strings with
massive endpoints. In this paper we propose models of baryons and confront them
with the baryon Regge trajectories. We show that these are best fitted by a
model of a single string with a quark at one e... | hep-ph |
Quark-Lepton Mass Relation and CKM mixing in an A4 Extension of the
Minimal Supersymmetric Standard Model: An interesting mass relation between down type quarks and charged leptons has
been recently predicted within a supersymmetric SU(3)_c \times SU(2)_L \times
U(1)_Y model based on the A4 flavor symmetry. Here we p... | hep-ph |
Implementing the exact kinematical constraint in the saturation
formalism: We revisit the issue of the large negative next-to-leading order (NLO) cross
section for single inclusive hadron production in $pA$ collisions in the
saturation formalism. By implementing the exact kinematical constraint in the
modified dipole... | hep-ph |
Data Unfolding in W mass measurements at LEP2: The use of an unfolding procedure is proposed as an alternative method of
extracting the $W$ boson mass from the data measured at LEP2, which may improve
the accuracy of this measurement. The benefits of the direct unfolding method
based on the Singular Value Decomposition... | hep-ph |
Charm and Bottom Quark Masses from Perturbative QCD: Using a new result for the first moment of the hadronic production cross
section at order ${\cal O}(\alpha_s^3)$, and new data on the $J/\psi$ and
$\psi'$ resonances for the charm quark, we determine the \msb masses of the
charm and bottom quarks to be $\bar{m}_c(\ba... | hep-ph |
Jet grooming through reinforcement learning: We introduce a novel implementation of a reinforcement learning (RL)
algorithm which is designed to find an optimal jet grooming strategy, a
critical tool for collider experiments. The RL agent is trained with a reward
function constructed to optimize the resulting jet prope... | hep-ph |
Large Neutrino Mixing in Grand Unified Theories: A non-minimal, semi-realistic version of supersymmetric SU(5) grand unified
theory is discussed. The solution of the doublet-triplet splitting problem
leads to a better agreement between the predicted and observed values of the
low-energy strong coupling constant and to ... | hep-ph |
Oblique corrections from less-Higgsless models in warped space: The Higgsless model in warped extra dimension is reexamined. Dirichlet
boundary conditions on the TeV brane are replaced with Robin boundary
conditions which are parameterized by a mass parameter $M$. We calculate the
Peskin-Takeuchi precision parameters $... | hep-ph |
Radiative Decays, Nonet Symmetry and SU(3) Breaking: We re-examine the problem of simultaneously describing in a consistent way
all radiative and leptonic decays of light mesons (V -> P gamma, P -> V gamma,
P -> gamma gamma, V -> e^+ e^-). For this purpose, we rely on the Hidden Local
Symmetry model in both its anomalo... | hep-ph |
Proton-antiproton annihilation into massive leptons: We extend previous calculations of polarization observables for the
annihilation reaction $\bar p +p\to \ell^{-}+\ell^{+}$ to the case of heavy
leptons, such as the $\tau$-lepton. We consider the case when the beam and/or
the target are polarized, as well as the pola... | hep-ph |
Recent developments on direct $CP$ violation in the kaon system and
connection to $K \to πν\barν$ measurements: The first lattice result from the RBC and UKQCD Collaborations and improved
perturbative calculations of $\varepsilon^{\prime}_K / \varepsilon_K$ have
implied that the Standard-Model (SM) expectation deviat... | hep-ph |
Revisiting constraints on 3+1 active-sterile neutrino mixing using
IceCube data: Recent IceCube search results for sterile neutrino increased tension between
the combined appearance and disappearance experiments. On the other hand,
MiniBooNE latest data confirms at $4.9\sigma$ CL the short-baseline oscillation
anomal... | hep-ph |
Beyond The Standard Model: This Time for Real: The value of the neutrino mass reported by the SuperK collaboration fits
beautifully into the framework of gauge theory unification. Here I justify this
claim, and review the other main reasons to believe in that framework.
Supersymmetry and SO(10) symmetry are important i... | hep-ph |
From Cosmic Inflation and Matter Creation to Dark Matter -- Journey of
the Inflaton?: A scenario of the inflaton evolution from cosmic inflation and matter
creation to dark matter/dark energy today is presented. To start with, a model
of the inflationary phase of the inflaton is introduced. The inflaton rolls
down a ... | hep-ph |
Phenomenology of epsilon_K in the top era: Todays key information on the shape of the unitarity triangle is obtained
from the well-measured quantity epsilon_K characterizing the CP-violation in
|Delta S|=2 transitions. The phenomenological analysis requires the input of
four key quantities: The magnitudes of the CKM el... | hep-ph |
The Higgs sector of the complex MSSM at two-loop order: QCD
contributions: Results are presented for the leading two-loop contributions of O(alpha_t
alpha_s) to the masses and mixing effects in the Higgs sector of the MSSM with
complex parameters. They are obtained in the Feynman-diagrammatic approach
using on-shell ... | hep-ph |
Hard Diffraction in Pythia 8: We present an overview of the options for diffraction implemented in the
general--purpose event generator Pythia 8. We review the existing model for
low-- and high--mass soft diffraction and present a new model for hard
diffraction in pp and ppbar collisions. Both models uses the Pomeron a... | hep-ph |
CGC predictions for p+A collisions at the LHC and signature of QCD
saturation: We present various predictions for the upcoming p+Pb collisions at \sqrt{S}=5
TeV within the color glass condensate (CGC) formalism, including single
inclusive charged hadron production, single inclusive prompt photon production,
direct ph... | hep-ph |
Finding the CP-Violating Higgs Bosons at e^+e^- Colliders: We discuss a general two-Higgs-doublet model with CP violation in the Higgs
sector. In general, the three neutral Higgs fields of the model all mix and the
resulting physical Higgs bosons have no definite CP properties. We derive a new
sum rule relating Yukawa ... | hep-ph |
Study of Single W production in e-gamma collisions through the decay
lepton spectrum to probe gamma-WW couplings: We investigate the effect of anomalous gamma-W-W couplings in e-gamma --> nu
W through the angular and energy spectrum of the secondary leptons. Within the
narrow-width approximation, a semi-analytical st... | hep-ph |
Complementarity of $B\to K^{(*)} μ\bar μ$ and $B\to K^{(*)} +
\mathrm{inv}$ for searches of GeV-scale Higgs-like scalars: The rare decays $B^+\to K^+ \mu\bar \mu$ and $B^0\to K^{*0} \mu\bar\mu$
provide the strongest constraints on the mixing of a light scalar with the
Higgs boson for GeV-scale masses. The constraints... | hep-ph |
Physics Beyond the Standard Model: I present a brief overview of some exciting possibilities for physics Beyond
the Standard Model. I include short discussions of neutrino physics, the strong
CP problem and axions, GUTs, large and warped extra dimensions, Little Higgs
models and supersymmetry. The chances appear excell... | hep-ph |
Matching between matrix elements and parton showers using a Leading-Log
subtraction method in NLO-QCD: A new method to construct event-generators based on next-to-leading order QCD
matrix-elements and leading-logarithmic parton showers is proposed. Matrix
elements of loop diagrams as well as those of a tree level can... | hep-ph |
Bi-large neutrino mixing from bilinear R-parity violation with
non-universality: We investigate how the bi-large mixing required by the recent neutrino data
can be accommodated in the supersymmetric standard model allowing bilinear
R-parity violation and non-universal soft terms. In this scheme, the tree-level
contri... | hep-ph |
CP violation in meson decays: This is a written version of a series of lectures aimed at graduate students
in the field of (theoretical and experimental) high energy physics. The main
topics covered are: (i) The flavor sector of the Standard Model and the
Kobayashi-Maskawa mechanism of CP violation; (ii) Formalism and ... | hep-ph |
Distinguishing split supersymmetry in Higgs signals at the Large Hadron
Collider: We examine the possibility of detecting signals of split supersymmetry in the
loop-induced decay h --> gamma gamma of the Higgs boson at the Large Hadron
Collider, where charginos, as surviving light fermions of the supersymmetric
spect... | hep-ph |
Improved Intermittency Analysis of Single Event Data: The intermittency analysis of single event data (particle moments) in
multiparticle production is improved, taking into account corrections due to
the reconstruction of history of a particle cascade. This approach is tested
within the framework of the $\alpha$-model... | hep-ph |
Higgs production in association with a single top quark at the LHC: We present a detailed study of Higgs boson production in association with a
single top quark at the LHC, at next-to-leading order accuracy in QCD. We
consider total and differential cross sections, at the parton level as well as
by matching short dista... | hep-ph |
Two-loop perturbative corrections to the constrained effective potential
in thermal QCD: In this paper, we compute the constrained QCD effective potential up to
two-loop order with finite quark mass and chemical potential. We present the
explicit calculations by using the double line notation and analytical
expressio... | hep-ph |
Single production of vector-like top partner decaying to $Wb$ in the
leptonic channel at $ep$ colliders in the LHT model: In the littlest Higgs model with T-parity(LHT), we study the single
production of vector-like top partner with the subsequent decay $T_{+}\to Wb$
in the leptonic channel at the $ep$ colliders. Foc... | hep-ph |
Comment on " a unified scheme for flavored mesons and baryons": We would comment on the results of the paper "a unified scheme for flavored
mesons and baryons" (P.C.Vinodkumar, J.N.Panandya, V.M.Bannur, and
S.B.Khadkikar Eur. Phys. J. A4(1999)83), and point out some inconsistencies and
mistakes in the work for solving ... | hep-ph |
Radiative tritium beta-decay and the neutrino mass: The shape of the electron energy spectrum in 3H beta-decay permits a direct
assay of the absolute scale of the neutrino mass; a highly accurate theoretical
description of the electron energy spectrum is necessary to the empirical task.
We update Sirlin's calculation o... | hep-ph |
Pentaquarks and Radially Excited Baryons: In this talk I report on a computation of the spectra of exotic pentaquarks
and radial excitations of the low--lying ${1/2}^+$ and ${3/2}^+$ baryons in a
chiral soliton model. | hep-ph |
Visible and dark matter from a first-order phase transition in a
baryon-symmetric universe: The similar cosmological abundances observed for visible and dark matter
suggest a common origin for both. By viewing the dark matter density as a
dark-sector asymmetry, mirroring the situation in the visible sector, we show
t... | hep-ph |
The electroweak chiral Lagrangian revisited: Using a manifestly gauge-invariant approach we show that the set of
low-energy constants in the electroweak chiral Lagrangian currently used in the
literature is redundant. In particular, by employing the equations of motion
for the gauge fields, one can choose to remove two... | hep-ph |
Searching for Charged Higgs Bosons via $e^+ e^- \to H^+ H^- \to c\bar{b}
\bar{c}b $ at Linear Colliders: We study a search for the charged Higgs boson via
$e^+e^- \to H^+H^- \to c\bar{b}\bar{c}b$ at the 500 GeV ILC. In a general two
Higgs doublet model without $Z_2$ symmetry, extra Yukawa couplings $\rho_{tt}$
and ... | hep-ph |
Effects of custodial symmetry breaking in the Georgi-Machacek model at
high energies: The model proposed by Georgi and Machacek enables the Higgs sector to involve
isospin triplet scalar fields while retaining a custodial $SU(2)_V$ symmetry in
the potential and thus ensuring the electroweak $\rho$ parameter to be one... | hep-ph |
Probing the long-range structure of the $T_{cc}^+$ with the strong and
electromagnetic decays: Very recently, the LHCb Collaboration reported the doubly charmed tetraquark
state $T_{cc}^+$ below the $D^{*+}D^0$ threshold about $273$ keV. As a very
near-threshold state, its long-distance structure is very important. I... | hep-ph |
Effective kinetic description of the expanding overoccupied Glasma: We report on a numerical study of the Boltzmann equation including
$2\leftrightarrow 2$ scatterings of gluons and quarks in an overoccupied Glasma
undergoing longitudinal expansion. We find that when a cascade of gluon number
to the infrared occurs, co... | hep-ph |
Chiral Magnetic Effect in Isobaric Collisions from Anomalous-Viscous
Fluid Dynamics (AVFD): The isobaric collision experiment at RHIC provides the unique opportunity to
detect the possible signal of Chiral Magnetic Effect (CME) in heavy ion
collisions. The idea is to contrast the correlation observables of the two
co... | hep-ph |
Light-Quark, Heavy-Quark Systems: An Update: We review many of the recently developed applications of Heavy Quark
Effective Theory techniques. After a brief update on Luke's theorem, we
describe striking relations between heavy baryon form factors, and how to use
them to estimate the accuracy of the extraction of $|V_{... | hep-ph |
Correct $Δm^2_{ij}$ Dependence for Neutrino Oscillation Formulae: The time translation operator for neutrino mass states is often taken to be
$e^{-iEt/\hbar}$. This is not relativistically invariant. In kaon mixing,
physicists use $e^{-imc^2\tau/\hbar}$ where $\tau$ is the proper time of the
kaon state. The factor $mc^... | hep-ph |
Large $\mathbf{b}$ behaviour in the CGC/saturation approach: BFKL
equation with pion loops: In this paper we proposed a solution to the longstanding problem of the
CGC/saturation approach: the power-like fall of the scattering amplitudes at
large $b$. This decrease leads to the violation of the Froissart theorem and
... | hep-ph |
Probing hyperon CP violation from charmed baryon decays: CP violation (CPV) in the baryon sectors has not yet been established
experimentally. In this work, we propose to search for the hyperon CPV through
the Cabibbo-favored charm-baryon decaying processes involving a hyperon in the
final states, such as $\Lambda_c^+\... | hep-ph |
Photoproduction of the charged charmoniumlike $Z_{c}^{+}(4200)$: In this work, inspired by the observation of charmoniumlike
$Z_{c}^{+}(4200)$% , we study the photoproduction of charged charmoniumlike
$Z_{c}^{+}(4200)$ with an effective Lagrangian approach and the Regge
trajectories model. The numerical results indicat... | hep-ph |
SMEFT analysis of vector boson scattering and diboson data from the LHC
Run II: We present a systematic interpretation of vector boson scattering (VBS) and
diboson measurements from the LHC in the framework of the dimension-six
Standard Model Effective Field Theory (SMEFT). We consider all available
measurements of V... | hep-ph |
Color confinement from fluctuating topology: QCD possesses a compact gauge group, and this implies a non-trivial
topological structure of the vacuum. In this contribution to the Gribov-85
Memorial volume, we first discuss the origin of Gribov copies and their
interpretation in terms of fluctuating topology in the QCD v... | hep-ph |
Proposal and theoretical formalism for studying baryon radiative decays
from J/ψ\to B^*\bar B + \bar{B^*}B \to γB\bar B: With accumulation of high statistics data at BESIII, one may study many new
interesting channels. Among them, J/\psi \to B^*\bar B + \bar{B^*}B \to \gamma
B\bar B processes may provide valuable inf... | hep-ph |
Technicolor Enhancement of $t \bar{t}$ Production at TeV-Colliders: It is shown that a technicolor theory containing a color-octet technipion,
usually denoted by $P^{0'}_{8}$, will give rise to an enhancement of $t \bar t$
production at the Tevatron, LHC and SSC, via the process $gg \rightarrow
P^{0'}_{8} \rightarrow t... | hep-ph |
Concerning pion parton distributions: Analyses of the pion valence-quark distribution function (DF),
${u}^\pi(x;\zeta)$, which explicitly incorporate the behaviour of the pion wave
function prescribed by quantum chromodynamics (QCD), predict ${u}^\pi(x\simeq
1;\zeta) \sim (1-x)^{\beta(\zeta)}$, $\beta(\zeta \gtrsim m_p... | hep-ph |
Quark sector of S3 models: classification and comparison with
experimental data: S3 models offer a low energy approach to describe the observed pattern of
masses and mixing, of both quarks and leptons. In this work, we first revisit
an S3 model with only one Higgs electroweak doublet, where the flavour symmetry
must ... | hep-ph |
Axial Vector $cc$ and $bb$ Diquark Masses from QCD Laplace Sum-Rules: Constituent mass predictions for axial vector (i.e., $J^P=1^+$) $cc$ and $bb$
colour antitriplet diquarks are generated using QCD Laplace sum-rules. We
calculate the diquark correlator within the operator product expansion to NLO,
including terms pro... | hep-ph |
Reduction of the proton radius discrepancy by 3 sigma: We show that in previous analyses of electron-proton scattering, the
uncertainties in the statistical procedure to extract the proton charge radius
are underestimated. Using a fit function based on a conformal mapping, we can
describe the scattering data with high ... | hep-ph |
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