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Nuclear Force from Monte Carlo Simulations of Lattice Quantum
Chromodynamics: The nuclear force acting between protons and neutrons is studied in the Monte
Carlo simulations of the fundamental theory of the strong interaction, the
quantum chromodynamics defined on the hypercubic space-time lattice. After a
brief summ... | hep-ph |
Single Spin Asymmetry in Inclusive Pion Production, Collins Effect and
the String Model (revised version): We calculated the single spin asymmetry in the inclusive pion production in
the fragmentation region of transversely polarized proton-proton collisions. We
generated the asymmetry at the level of fragmentation f... | hep-ph |
Can the X(3872) be a 1^{++} four-quark state?: We use QCD spectral sum rules to test the nature of the meson X(3872),
assumed to be an exotic four-quark (c\bar{c}q\bar{q}) state with J^{PC}=1^{++}.
For definiteness, we work with the current proposed recently by Maiani et al
[1], at leading order in \alpha_s, consider t... | hep-ph |
First Lattice QCD Study of the Sigma -> n Axial and Vector Form Factors
with SU(3) Breaking Corrections: We present the first quenched lattice QCD study of the form factors relevant
for the hyperon semileptonic decay Sigma -> n l nu. The momentum dependence of
both axial and vector form factors is investigated and th... | hep-ph |
Eta-eta' mixing from V->Pgamma and J/psi->VP decays: The $\eta$-$\eta^\prime$ pseudoscalar mixing angle and the gluonium content
of the $\eta^\prime$ meson are deduced from an updated phenomenological
analysis of $V\to P\gamma$ and $J/\psi\to VP$ decays. In absence of gluonium,
the value of the mixing angle in the quar... | hep-ph |
Neutrino Mass from Triplet and Doublet Scalars at the TeV Scale: If the minimal standard model of particle interactions is extended to include
a scalar triplet with lepton number $L=-2$ and a scalar doublet with $L=-1$,
neutrino masses $m_\nu \sim \mu_{12}^4 v^2/M^5 \sim 10^{-2}$ eV is possible,
where $v \sim 10^2$ GeV... | hep-ph |
QCD Corrections to Flavor Changing Neutral Coupling Mediated Rare Top
Quark Decays: Recently we have presented an analysis of flavor changing neutral coupling
mediated radiative top quark decays at next-to-leading order in QCD. In the
present paper we provide the details of the calculation of QCD corrections to
t-> q... | hep-ph |
Learning to Identify Semi-Visible Jets: We train a network to identify jets with fractional dark decay (semi-visible
jets) using the pattern of their low-level jet constituents, and explore the
nature of the information used by the network by mapping it to a space of jet
substructure observables. Semi-visible jets aris... | hep-ph |
An alternative heavy Higgs mass limit: After commenting on the present value of the Higgs particle mass from
radiative corrections, we explore the phenomenological implications of an
alternative, non-perturbative renormalization of the scalar sector where the
mass of the Higgs particle does not represent a measure of o... | hep-ph |
Two-particle Correlations in multi-Regge Kinematics: Multi-jet production at the LHC is an important process to study. In
particular, events with final state kinematic configurations where we have two
jets widely separated in rapidity with similar pT and lots of mini-jets or jets
populating the space in between are rel... | hep-ph |
BFKL Pomeron and the survival factor: We consider the absorptive corrections and the rapidity gap survival factor
which are necessary to provide the unitarization of the BFKL Pomeron. In
particular we discuss the role of the enhanced screening diagrams. | hep-ph |
Lecture notes on the Skyrme model: This lecture provides a pedagogical instruction to the basic concepts of the
Skyrme model and its some applications. As the preliminary for understanding
the Skyrme model, we first briefly explain the large $N_c$ expansion, chiral
symmetry and its breaking. Next we give a brief review... | hep-ph |
Top Quark Physics: In this contribution I review the physics of top quarks at a future Linear
Collider. Main emphasis is put on the process e+ e- to ttbar close to
threshold. Different physical observables, their sensitivity to the basic
parameters and their theoretical prediction are discussed. Recent higher order
cal... | hep-ph |
A Higgslike Dilaton: We examine the possibility that the recently discovered 125 GeV higgs like
resonance actually corresponds to a dilaton: the Goldstone boson of scale
invariance spontaneously broken at a scale f. Comparing to LHC data we find
that a dilaton can reproduce the observed couplings of the new resonance a... | hep-ph |
New-Physics Search in gamma gamma --> t tbar: We performed an analysis on possible anomalous top-quark couplings generated
by SU(2) x U(1) gauge-invariant dimension-6 effective operators, applying the
optimal-observable procedure to the final lepton/b-quark momentum distribution
in gamma gamma --> t tbar --> l X/b X. W... | hep-ph |
Revealing the source of the radial flow patterns in proton--proton
collisions using hard probes: In this work, we propose a tool to reveal the origin of the collective-like
phenomena observed in proton--proton collisions. We exploit the fundamental
difference between the underlying mechanisms, color reconnection (CR)... | hep-ph |
Real time simulations of high energy nuclear collisions: We discuss real time simulations of high energy nuclear collisions in a
classical effective theory of QCD at small x. At high transverse momenta, our
results match the lowest order predictions of pQCD based mini-jet calculations.
We discuss novel non-perturbative... | hep-ph |
Implementation of target mass corrections and higher-twist effects in
the xFitter framework: Knowledge of parton distribution functions (PDFs) at large momentum fraction
$ x $ is not only important to study the flavor and spin dynamics of quarks in
the nucleon, but also to search for signals of new physics at collide... | hep-ph |
Mass of the Stabilized Radion in the Limit of Finite Quartic Coupling: We present an exact treatment of the modulus stabilization condition with the
general boundary conditions of the bulk scalar field in the Randall-Sundrum
model. We find analytical expressions for the value of the modulus and the mass
of the radion. | hep-ph |
Hard colour singlet exchange at the Tevatron from the BFKL equation: We study rapidity gaps between jets in ppbar collisions at the Tevatron by a
novel solution of the nonforward BFKL equation including nonleading effects
through the consistency constraint and running coupling. Results differ from
earlier calculations ... | hep-ph |
Non-linear corrections to the longitudinal structure function $F_{L}$
from the parametrization of $F_{2}$: Laplace transform approach: The non-linear corrections (NLC) to the longitudinal structure function in a
limited approach is derived at low values of the Bjorken variable $x$ by using
the Laplace transforms tech... | hep-ph |
D_{sJ}^+(2317)\to D_s^+π^0 decay width: We use the QCD sum rules to analize the hadronic decay $D_{sJ}^{+}(2317)\to
D_s^+\pi^0$, in the hypotesis that the $D_{sJ}^{+}(2317)$ can be identified as
a four-quark state. We use a diquak-antidiquark current and work to the order
of $m_s$ in full QCD, without relying on $1/m_c... | hep-ph |
Non-Unitary $3 \times 3$ Mixing in Majorana Neutrinos and Vector-like
Quark Models: Non-unitary $3 \times 3$ mixing matrices are present in many extensions of
the Standard Model. One of the most simple extensions is the addition of $n_R$
right-handed neutrinos without imposing Lepton Number Conservation
($n_R$$\nu$SM... | hep-ph |
Indirect Searches for $Z'$-like Resonances at the LHC: We explore the possibility of indirectly observing the effects of $Z'$-like
particles with electroweak strength couplings in the Drell-Yan channel at the
LHC with masses above the resonance direct search reach. We find that, mostly
due to statistical limitations, t... | hep-ph |
Higgs inflation and Higgs portal dark matter with right-handed neutrinos: We investigate the Higgs inflation and the Higgs portal dark matter with the
right-handed neutrino. The dark matter and the right-handed neutrino in the
Higgs inflation play important roles in explaining the recent experimental
results of the Hig... | hep-ph |
Reducing the Quadratic Divergence in the Higgs Mass Squared Without Top
Partners: We examine a model with multiple scalar fields to see whether it is possible
to reduce the fine- tuning of the SM Higgs mass without introducing low scale
top partners. Our approach may be regarded as a generalization of the condition
p... | hep-ph |
Errata for "The Higgs Hunter's Guide": Errata are given for "The Higgs Hunter's Guide". These errata should be
applied to the second printing of the book, dated 1991. The second printing has
already corrected numerous errors and misprints contained in the originally
published 1990 edition. | hep-ph |
Soft scalar masses in supergravity with horizontal U(1)_X gauge symmetry: In supergravity with modular invariance and horizontal $U(1)_X$ gauge
symmetry there is a relation between modular weights and $U(1)_X$ charges. The
soft scalar masses are then strongly correlated with Yukawa matrices. The
implications for FCNC a... | hep-ph |
Top quark pair production at small transverse momentum in hadronic
collisions: We investigate the transverse momentum resummation for top quark pair
production at hadron colliders using the soft-collinear effective theory and
the heavy-quark effective theory. We derive the factorization formula for
$t\bar{t}$ product... | hep-ph |
Models of Flavor with Discrete Symmetries: In an attempt to understand the observed patterns of lepton and quark masses,
models invoking a flavor symmetry $G_f$, under which the Standard Model
generations are charged, have been proposed. One particularly successful
symmetry, U(2), has been extensively discussed in the ... | hep-ph |
Squark production with R-symmetry beyond NLO at the LHC: The Minimal R-symmetric Supersymmetric Standard Model (MRSSM) provides a
realisation of supersymmetry in which the parameter space is less constrained
by the current LHC data than in the simplest supersymmetric scenarios. In the
present paper, we obtain the most ... | hep-ph |
Large Top Mass and Non-Linear Representation of Flavour Symmetry: We consider an effective theory (ET) approach to flavour-violating processes
beyond the Standard Model (SM), where the breaking of flavour symmetry is
described by spurion fields whose low-energy vacuum expectation values are
identified with the SM Yukaw... | hep-ph |
Refined renormalization group improvement for thermally resummed
effective potential: We newly develop a renormalization group (RG) improvement for thermally
resummed effective potentials. In this method, $\beta$-functions are
consistently defined in resummed perturbation theories, so that order-by-order
RG invarianc... | hep-ph |
Dashen's theorem and electromagnetic masses of the mesons: Employing $U(3)_L\times U(3)_R$ chiral field theory, we find that Dashen's
theorem, which holds for pseudoscalar mesons, can be generalized to the sector
of axial-vector mesons, however, fails for vector mesons. | hep-ph |
Mixing dynamics of dimension-five interactions
(scalar/pseudoscalar-photon) in magnetized medium: In many extentions of standard model, dimension-5 scalar di-photon
($g_{\gamma\gamma\phi}\phi$ $F^{\mu\nu}F_{\mu\nu}$ ) or pseudoscalar di-photon
($g_{\gamma\gamma a}a\tilde{F}^{\mu\nu} F_{\mu\nu} $, ) interaction
materi... | hep-ph |
Multiparton webs beyond three loops: Correlators of Wilson-line operators are fundamental ingredients for the
study of the infrared properties of non-abelian gauge theories. In perturbation
theory, they are known to exponentiate, and their logarithm can be organised in
terms of collections of Feynman diagrams called we... | hep-ph |
Wilson Expansion of QCD Propagators at Three Loops: Operators of
Dimension Two and Three: In this paper we construct the Wilson short distance operator product
expansion for the gluon, quark and ghost propagators in QCD, including
operators of dimension two and three, namely, A^2, m^2, m A^2, \ovl{\psi} \psi
and m^3.... | hep-ph |
Mapping the phase diagram of strongly interacting matter: We employ a conformal mapping to explore the thermodynamics of strongly
interacting matter at finite values of the baryon chemical potential $\mu$.
This method allows us to identify the singularity corresponding to the critical
point of a second-order phase tran... | hep-ph |
The Neutral Higgs Effects on Rare Decays $B \to X_s l^+ l^-$ in T2HDM: We calculate the new physics contributions to the branching ratios of the
rare decays $B \to X_s l^+ l^-$ $(l=e, \mu)$ induced by neutral Higgs bosons
loop diagrams in the top quark two-Higgs-doublet model (T2HDM). From the
numerical calculations, w... | hep-ph |
$ρ$ meson generalized parton distributions in the Nambu--Jona-Lasinio
model: In this paper, both the unpolarized and the polarized $\rho$ meson
generalized parton distributions are investigated in the framework of the
Nambu--Jona-Lasinio model using proper time regularization scheme. The symmetry
properties of $\rho$... | hep-ph |
The first-order factorizable contributions to the three-loop massive
operator matrix elements $A_{Qg}^{(3)}$ and $ΔA_{Qg}^{(3)}$: The unpolarized and polarized massive operator matrix elements $A_{Qg}^{(3)}$
and $\Delta A_{Qg}^{(3)}$ contain first-order factorizable and non-first-order
factorizable contributions in t... | hep-ph |
The single parton fragmentation functions of heavy quarkonium in soft
gluon factorization: We study the single parton fragmentation functions (FFs) at the input
factorization scale $\mu_0\gtrsim 2m_Q$, with heavy quark mass $m_Q$, in the
soft gluon factorization (SGF) approach. We express the FFs in terms of
perturba... | hep-ph |
Progress in Lattice QCD Relevant for Flavor Physics: Recent Lattice QCD results relevant for Kaon, Charm and B Physics are
summarized. There is general agreement among calculations using a wide range of
different lattice actions. This bolsters confidence in the lattice results and
in their quoted errors. One notes cons... | hep-ph |
How suppressed are the radiative interference effects in heavy unstable
particle production?: We present a \lq\lq theorem" which quantifies, for inclusive processes, the
level of suppression of the radiative interference effects between the
production and decay stages of heavy {\it unstable} particles. The theorem,
w... | hep-ph |
Light-meson properties from the Bethe-Salpeter equation: We discuss how to extract observables from an inhomogeneous vertex
Bethe-Salpeter equation without resorting to the corresponding homogeneous
equation. As an example we present a prediction for the $e^+e^-$ decay width of
the $\rho(1450)$ or $\rho'$ meson. We als... | hep-ph |
Linear Collider Signal of a Wino LSP in Anomaly Mediated Scenarios: Selectron (smuon) pair-production in a next generation Linear Collider,
yielding a fast electron (muon) trigger, a visible heavily ionizing track
and/or a resolved soft pion impact parameter and overall $\mET$, is shown to
provide a smoking gun signatu... | hep-ph |
Parity violating magnetization at neutrino pair emission using trivalent
lanthanoid ions: A new detection method using magnetization generated at triggered radiative
emission of neutrino pairs (RENP), $ |e \rangle \rightarrow | g \rangle +
\gamma + \sum_{ij}\nu_i \bar{\nu}_j $ (atomic de-transition from state $|e
\ra... | hep-ph |
How Penguins Started to Fly: A mechanism explaining a strong enhancement of nonleptonic weak decays was
suggested in 1975, later to be dubbed the penguin. This mechanism extends
Wilson's ideas about the operator product expansion at short distances and
reveals an intricate interplay of subtle features of the theory suc... | hep-ph |
Renormalization Group Effects on the Mass Relation Predicted by the
Standard Model with Generalized Covariant Derivatives: Renormalization group analysis is made on the relation $m_{\rm H} \simeq
\sqrt{2}m_t$ for masses of the top quark and the Higgs boson, which is
predicted by the standard model based on generalize... | hep-ph |
Analysis of the $X(6600)$, $X(6900)$, $X(7300)$ and related tetraquark
states with the QCD sum rules: In this work, we re-investigate the mass spectrum of the ground state, first,
second and third radial excited states of the diquark-antidiquark type
fully-charm tetraquark states with the QCD sum rules plus Regge tra... | hep-ph |
Neutrino oscillations in the early Universe: We discuss the oscillations effects on neutrinos in the early Universe and
update the cosmological constraints on the oscillation parameters. It is shown
that sterile LOW solution to the solar neutrino problem is almost completely
excluded from cosmological nucleosynthesis c... | hep-ph |
Quirky Explanations for the Diphoton Excess: We propose two simple quirk models to explain the recently reported 750 GeV
diphoton excesses at ATLAS and CMS. It is already well-known that a real
singlet scalar $\phi$ with Yukawa couplings $\phi \bar X X$ to vector-like
fermions $X$ with mass $m_X > m_\phi/2$ can easily ... | hep-ph |
Charged Lepton Spectrum Approximation in a Three Body Nucleon Decay: Only phase space is typically used to obtain final state particle spectra in
rare decay searches, which is a crude approximation in the case of three body
processes. We will demonstrate how both dynamics and phase space can be
approximately accounted ... | hep-ph |
Threshold effects on prediction for proton decay in non-supersymmetric
$E_6$ GUT with intermediate trinification symmetry: We consider a non-supersymmetric $E_6$ Grand Unified Theory (GUT) with
intermediate trinification symmetry $SU(3)_C \times SU(3)_L \times SU(3)_R
\times D$ (D denoted as D-parity for discrete lef... | hep-ph |
Definition and Evolution of Transverse Momentum Distributions: We consider the definition of unpolarized transverse-momentum-dependent
parton distribution functions while staying on-the-light-cone. By imposing a
requirement of identical treatment of two collinear sectors, our approach,
compatible with a generic factori... | hep-ph |
High Energy Photon-Photon and Electron-Photon Collisions: The advent of a next linear $e^\pm e^-$ collider and back-scatterd laser
beams will allow the study of a vast array of high energy processes of the
Standard Model through the fusion of real and virtual photons and other gauge
bosons. As examples, I discuss virtu... | hep-ph |
Restoration of Parity and the Right-Handed Analog of the CKM Matrix: In a recent Letter we determined analytically the right-handed quark mixing
matrix in the minimal Left-Right symmetric theory with generalized Parity. We
derived its explicit form as a series expansion in a small parameter that
measures the departure ... | hep-ph |
Azimuthal angles in diffractive ep collisions: We investigate azimuthal correlations in deep inelastic diffractive
scattering, e + p -> e + \tilde{p} + X. The dependence of the ep cross section
on the angle between the lepton plane and some direction in the hadronic final
state can be written in a simple form; its meas... | hep-ph |
SuperIso program and flavor data constraints: We present here an overview of the SuperIso program which is a public code
dedicated to the calculation of flavor physics observables in supersymmetry.
The main purpose of the SuperIso program is to provide, by confronting the
theoretical predictions to the experimental dat... | hep-ph |
Light diffraction by a strong standing electromagnetic wave: The nonlinear quantum interaction of a linearly polarized x-ray probe beam
with a focused intense standing laser wave is studied theoretically. Because of
the tight focusing of the standing laser pulse, diffraction effects arise for
the probe beam as opposed ... | hep-ph |
Spin-dependent Pomeron and Odderon in elastic proton-proton scattering: We introduce a new model of near-forward elastic proton-(anti)proton
scattering at high energy based on the modern formulation of Pomeron and
Odderon in terms of Wilson lines and generalized TMDs (GTMDs). We compute the
helicity-dependent elastic a... | hep-ph |
A two particle hidden sector and the oscillations with photons: We present a detailed study of the oscillations and optical properties for
vacuum, in a model for the dark sector that contains axion-like particles and
hidden photons. In this model, both can couple to photons. We provide bounds
for the couplings versus t... | hep-ph |
Topics in Electroweak Physics: We briefly discuss five topics in Precision Electroweak Physics: i) the
recently proposed Effective Scheme of Renormalization, ii) evidence for
electroweak bosonic corrections derived from the radiative correction
Delta_r_eff, iii) an approach to estimate the scale of new physics in a
hyp... | hep-ph |
On Distinguishing Radions From Higgs Bosons: Radion couplings are almost identical to Higgs boson couplings, making it
very difficult to distinguish the two states when the radion mass and vacuum
expectation value are similar to those of the Higgs boson. The only real
difference lies in the fact that the coupling of ra... | hep-ph |
Pairing Phase Transitions of Matter under Rotation: The phases and properties of matter under global rotation have attracted much
interest recently. In this paper we investigate the pairing phenomena in a
system of fermions under the presence of rotation. We find that there is a
generic suppression effect on pairing st... | hep-ph |
Translation of Time-Reversal Violation in the Neutral K-Meson System
into a Table-Top Mechanical System: Weak interactions break time-reversal (T) symmetry in the two-state system of
neutral K mesons. We present and discuss a two-state mechanical system, a
Foucault-type pendulum on a rotating table, for a full repres... | hep-ph |
Intrinsic transverse momentum and transverse spin asymmetries: We investigate leading twist transverse momentum dependent origins of
transverse spin asymmetries in hadron-hadron collisions. The chiral-odd T-odd
distribution function with intrinsic transverse momentum dependence, which
would signal an intrinsic handedne... | hep-ph |
Autoencoders for Semivisible Jet Detection: The production of dark matter particles from confining dark sectors may lead
to many novel experimental signatures. Depending on the details of the theory,
dark quark production in proton-proton collisions could result in semivisible
jets of particles: collimated sprays of da... | hep-ph |
Final state strong interaction constraints on weak D0 -> K0S pi+ pi-
decay amplitudes: Weak decay tree and annihilation - t-channel W - exchange amplitudes for the
D0 -> K0S pi+ pi- process are calculated using quasi two-body QCD factorization
approach and unitarity constraints. Final state strong kaon-pion and pion-... | hep-ph |
Should we still believe in constrained supersymmetry?: We calculate Bayes factors to quantify how the feasibility of the constrained
minimal supersymmetric standard model (CMSSM) has changed in the light of a
series of observations. This is done in the Bayesian spirit where probability
reflects a degree of belief in a ... | hep-ph |
Finite Theories and the SUSY Flavor Problem: We study a finite SU(5) grand unified model based on the non-Abelian discrete
symmetry A_4. This model leads to the democratic structure of the mass matrices
for the quarks and leptons. In the soft supersymmetry breaking sector, the
scalar trilinear couplings are aligned and... | hep-ph |
Dark matter annihilation into leptons through gravity portals: Dark matter (DM) constitutes 85% of the matter in the Universe. However, its
specific particle property is still unclear. The fundamentals of DM particles
subject to gravitational interaction, and that the lepton excess in cosmic rays
may originate from DM ... | hep-ph |
Explaining jet quenching with perturbative QCD alone: We present a new formulation of jet quenching in perturbative QCD beyond the
eikonal approximation. Multiple scattering in the medium is modelled through
infra-red-continued (2 -> 2) scattering matrix elements in QCD and the parton
shower describing further emission... | hep-ph |
Neutrino mass generation from the perspective of presymmetry: The Standard Model (SM) with one right-handed neutrino per generation is
revisited with presymmetry being the global $U(1)_{B-L}$ symmetry of an
electroweak theory of leptons and quarks with initially postulated symmetric
fractional charges. The cancellation... | hep-ph |
Measuring $|V_{ub}|$ at future B-Factories: We calculate the so--called Fermi motion parameter $p_{_F}$ of ACCMM model
using the variational method in a potential model approach. We also propose
hadronic invariant mass distribution as an alternative experimental observable
to measure $V_{ub}$ at future asymmetric $B$ f... | hep-ph |
Application of a Revised Moliere Theory to the Description of the
Landau-Pomeranchuk Effect: Using the Coulomb corrections to some important parameters of a revised
Moliere multiple scattering theory, we have obtained analytically and
numerically the Coulomb corrections to the quantities of the Migdal theory of
the L... | hep-ph |
Meson Production and Spectroscopy at HERA: Selected recent results from the H1 and ZEUS experiments are reviewed,
illustrating some of the many facets of ``meson physics'' at the HERA ep
collider. The results cover exclusive elastic and proton-dissociative
diffractive vector meson production and comparisons with recent... | hep-ph |
Radiative decays \$D^*_{(s)}\to D_{(s)}γ$ in covariant confined
quark model: Radiative decays $D^*_{(s)}\to D_{(s)}\gamma$ are revisited in light of new
experimental data from the \textit{BABAR} and BESIII collaborations. The
radiative couplings $g_{D^*D\gamma}$ encoding nonperturbative QCD effects are
calculated in ... | hep-ph |
Power Counting For and Symmetries of the Effective Field Theory For NN
Interactions: The appropriate power counting for the effective field theory of NN
interactions is reviewed. It is more subtle than in most effective field
theories since in the limit that the S-wave NN scattering lengths go to
infinity it is gover... | hep-ph |
Quarkonium production in hadronic collisions: We summarize the theoretical description of charmonium and bottonium
production in hadronic collisions and compare it to the available data from
hadron-nucleon interactions. With the parameters of the theory established by
these data, we obtain predictions for quarkonium pr... | hep-ph |
Inclusive Quark Production in $e^{+}e^{-}$-Annihilation - A Path
Integral Approach: The single-particle inclusive differential cross-section for a reaction
$a+b\to c+X$ is written as imaginary part of a correlation function in a
forward scattering amplitude for $a+b\to a+b$ in a modified effective theory.
In this mod... | hep-ph |
Mixed QCD-electroweak corrections to Higgs boson production in gluon
fusion: We compute the 3-loop O(\alpha \alpha_s) correction to the Higgs boson
production cross section arising from light quarks using an effective theory
approach. Our calculation probes the factorization of QCD and electroweak
perturbative correc... | hep-ph |
Bs to mu mu gamma from Bs to mu mu: The Bs to mu mu gamma decay offers sensitivity to a wider set of effective
operators than its non-radiative counterpart Bs to mu mu, and a set that is
interesting in the light of present-day discrepancies in flavour data. On the
other hand, the direct measurement of the Bs to mu mu g... | hep-ph |
Exotic and nonexotic magnetic transitions in the context of the SELEX
and GRAAL experiments: We calculate magnetic transition moments in the chiral quark-soliton model,
with explicit SU(3)-symmetry breaking taken into account. The dynamical model
parameters are fixed by experimental data for the magnetic moments of t... | hep-ph |
Magnetic Moment of Leptons: We show that the magnetic moment of leptons is significantly modified in
thermal background as compared to the corresponding vacuum value. We compare
the magnetic moment of all different leptons near nucleosynthesis. It is shown
that the significance of thermal corrections depends on the tem... | hep-ph |
Mirror model for sterile neutrinos: Sterile neutrinos are studied as subdominant contribution to solar neutrino
physics. The mirror-matter neutrinos are considered as sterile neutrinos. We
use the symmetric mirror model with gravitational communication between mirror
and visible sectors. This communication term provide... | hep-ph |
Isolated prompt photon pair production at hadron colliders with
kt-factorization: In the framework of the kt-factorization approach, the isolated prompt photon
pair production in pp and p \bar p collisions at high energies is studied. The
consideration is based on the quark-antiquark annihilation, quark-gluon
scatter... | hep-ph |
Spontaneous Peccei-Quinn symmetry breaking renders sterile neutrino,
axion and $χ$boson to be candidates for dark matter particles: We study the Peccei-Quinn (PQ) symmetry of the sterile right-handed neutrino
sector and the gauge symmetries of the Standard Model. Due to four-fermion
interactions, spontaneous breaking... | hep-ph |
Relativistic corrections to the semi-inclusive decay of $\bmψ$ and
$\bmΥ$: In the framework of the nonrelativistic quantum chromodynamics factorization
formalism, we study the processes of $\psi(nS)$ and $\Upsilon(nS)$ decay into a
lepton pair or a charm pair associated with two jets up to the next-to-leading
order i... | hep-ph |
Detecting Boosted Dark Photons with Gaseous Detectors: We search for indirect signals of $\mathscr{O}$(keV) dark matter annihilating
or decaying into $\mathscr{O}$(eV) dark photons. These dark photons will be
highly boosted and have decay lengths larger than the Milky Way, and can be
absorbed by neutrino or dark matter... | hep-ph |
Contributions of order ${\cal O}(m_{\rm quark}^2)$ to $K_{\ell 3}$ form
factors and unitarity of the CKM matrix: The form factors for the $K_{\ell 3}$ semileptonic decay are computed to
order $O(p^4)$ in generalized chiral perturbation theory. The main difference
with the standard $O(p^4)$ expressions consists in con... | hep-ph |
Structure of Pion Photoproduction Amplitudes: We derive and apply the finite energy sum rules to pion photoproduction. We
evaluate the low energy part of the sum rules using several state-of-the-art
models. We show how the differences in the low energy side of the sum rules
might originate from different quantum number... | hep-ph |
Specific Dark Matter signatures from hidden U(1): Several constructions motivate the existence of a dark $U(1)_D$ gauge boson
which interacts with the Standard Model only through its kinetic mixing or loop
induced processes. We describe two typical examples with specific signatures in
particular we show that a region w... | hep-ph |
Implication of Super-Kamiokande Data on R-parity Violation: R-parity violating bilinear (soft) terms in the supersymmetric standard model
would be the leading source for nonzero neutrino masses and mixing. We point
out that the mixing between neutralinos (charginos) and neutrinos (charged
leptons) driven by the bilinea... | hep-ph |
Interplay of Hard and Soft Processes at JLab Energies: Even at moderate energy machines, there is a regime where hard pion
electroproduction proceeds by a perturbatively calculable process. The process,
we claim, is not the leading twist fragmentation one but rather a higher twist
process that produces kinematically is... | hep-ph |
New Pattern of Chiral Symmetry Restoration: In this talk I summarize our recent works on the chiral symmetry restoration
in the large flavor QCD using the hidden local symmetry (HLS) as an effective
field theory of QCD. Bare parameters in the HLS are determined by matching the
HLS with QCD at the matching scale through... | hep-ph |
Direct stau production at the LHC: We investigate the direct production of supersymmetric scalar taus at the
LHC. We present the general calculation of the dominant cross section
contributions for hadronic stau pair production within the MSSM, taking into
account left-right mixing of the stau eigenstates. We find that ... | hep-ph |
Correlation of Theoretical Uncertainties in PDF Fits and Theoretical
Uncertainties in Predictions: We show how to account for correlations between theoretical uncertainties
incorporated in parton distribution function (PDF) fits, and the theoretical
uncertainties in the predictions made using these PDFs. We demonstra... | hep-ph |
Cosmology and New Physics: A comparison of the standard models in particle physics and in cosmology
demonstrates that they are not compatible, though both are well established.
Basics of modern cosmology are briefly reviewed. It is argued that the
measurements of the main cosmological parameters are achieved through ma... | hep-ph |
Lepton Flavor Violating Process in Bi-maximal texture of Neutrino
Mixings: We investigate the lepton flavor violation in the framework of the MSSM with
right-handed neutrinos taking the large mixing angle MSW solution in the
quasi-degenerate and the inverse-hierarchical neutrino masses. We predict the
branching ratio... | hep-ph |
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