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We show that in supersymmetric extensions of the Standard Model gluino box diagrams can yield a large CP-violating Delta(I)=3/2 contribution to s->d+q(bar)+q flavor-changing neutral current processes, which feeds into the I=2 isospin…

高能物理 - 唯象学 · 物理学 2009-10-31 Matthias Neubert

Determination of the intercept of the BFKL pomeron is one of the pressing issues in the high energy physics. Earlier we have shown that, at the dipole size $r=r_{\Delta}=(0.1-0.2)$f, the dipole cross section $\sigma(x,r)$ which is a…

高能物理 - 唯象学 · 物理学 2010-11-01 N. N. Nikolaev , B. G. Zakharov

The TWIST Collaboration has completed a new measurement of the energy-angle spectrum of positrons from the decay of highly polarized muons. A simultaneous measurement of the muon decay parameters {\rho}, {\delta}, and (P_{\mu}){\xi} tests…

We perform a systematic study of the Standard Model embedding in a D-brane configuration of type I string theory at the TeV scale. We end up with an attractive model and we study several phenomenological questions, such as gauge coupling…

高能物理 - 理论 · 物理学 2008-11-26 I. Antoniadis , E. Kiritsis , J. Rizos , T. N. Tomaras

The London ground-state energy formula as a function of number density for a system of identical boson hard spheres, corrected for the reduced mass of a pair of particles in a sphere-of-influence picture, and generalized to fermion…

统计力学 · 物理学 2009-11-13 M. A. Solís , M. de Llano , J. W. Clark , George A. Baker

The minimal dark matter model is given a supersymmetric extension. A super SU(2)L quintuplet is introduced with its fermionic neutral component still being the dark matter, the dark matter particle mass is about 19.7 GeV. Mass splitting…

高能物理 - 唯象学 · 物理学 2015-06-04 Xue Chang , Chun Liu , Feng-Cai Ma , Shuo Yang

To investigate the possible geometric structure of the proton, an improved stringy proton model is constructed beyond the smallest distance approximation, where the constituent quarks are connected by gluon tubes which merge at the Fermat…

高能物理 - 唯象学 · 物理学 2024-06-19 Wenchang Xiang , Yanbing Cai , Mengliang Wang , Daicui Zhou

We present microscopic QCD calculation of the cross section of diffractive DIS and of the partonic structure of the pomeron from the dipole approach to the generalized BFKL pomeron. We show that the pomeron can not be treated as a particle…

高能物理 - 唯象学 · 物理学 2009-09-25 M. Genovese , N. N. Nikolaev , B. G. Zakharov

We investigate the energy dependence of the photo-production cross-section of vector mesons $J/\Psi$ and $\Upsilon$, measured by both HERA experiments H1 and ZEUS in electron-proton collisions and by LHC experiments ALICE, CMS and LHCb in…

高能物理 - 唯象学 · 物理学 2019-08-12 Martin Hentschinski , Krzysztof Kutak

In supersymmetric extensions of the Standard Model, the observed particles come in fermion-boson pairs necessary for the realization of supersymmetry (SUSY). In spite of the expected abundance of super-partners for all the known particles,…

高能物理 - 理论 · 物理学 2021-04-13 Pedro D. Alvarez , Lucas Delage , Mauricio Valenzuela , Jorge Zanelli

We propose a simple mechanism for copiously producing heavy Higgs bosons with enhanced decay rates to two photons at the LHC, within the context of the Minimal Supersymmetric extension of the Standard Model (MSSM). In the CP-conserving…

高能物理 - 唯象学 · 物理学 2016-12-20 Abdelhak Djouadi , Apostolos Pilaftsis

We explore the phenomenology of the minimal supersymmetric flipped SU(5) GUT model (CFSU(5)), whose soft supersymmetry-breaking (SSB) mass parameters are constrained to be universal at some input scale, $M_{in}$, above the GUT scale,…

高能物理 - 唯象学 · 物理学 2011-07-13 John Ellis , Azar Mustafayev , Keith A. Olive

Tensor-polarized parton distribution functions are new quantities in spin-one hadrons such as the deuteron, and they could probe new quark-gluon dynamics in hadron and nuclear physics. In charged-lepton deep inelastic scattering (DIS), they…

高能物理 - 唯象学 · 物理学 2016-09-28 S. Kumano , Qin-Tao Song

The straightforward supersymmetrization of the Standard Model (SM) results in a phenomenologically inconsistent theory in which Baryon number ($B$) and Lepton number ($L$) are violated by dimension 4 operators, inducing fast proton decay.…

高能物理 - 唯象学 · 物理学 2007-05-23 Diego Restrepo

Geometric scaling is a novel scaling phenomenon observed in deep inelastic scattering at small x: the total virtual photon-proton cross section depends upon the two kinematical variables Q^2 and x only via their combination Q^2 R_0^2(x),…

高能物理 - 唯象学 · 物理学 2007-05-23 E. Iancu , K. Itakura , L. McLerran

In supersymmetric (SUSY) theories with extra dimensions the visible energy in sparticle decays can be significantly reduced and its energy distribution broadened, thus significantly weakening the present collider limits on SUSY. The…

高能物理 - 唯象学 · 物理学 2015-06-18 Savas Dimopoulos , Kiel Howe , John March-Russell , James Scoville

The longitudinal structure function in deep inelastic scattering is one of the observables from which the gluon distribution can be unfolded. Consequently, this observable can be used to constrain the QCD dynamics at small $x$. In this work…

高能物理 - 唯象学 · 物理学 2011-09-13 V. P. Goncalves , M. V. T. Machado

Standard Model may be defined with the additional discrete symmetry, i.e. with the gauge group $SU(3)\times SU(2) \times U(1)/{\cal Z}$ (${\cal Z} = Z_6$, $Z_3$ or $Z_2$) instead of the usual $SU(3)\times SU(2) \times U(1)$. It has the same…

高能物理 - 唯象学 · 物理学 2008-11-26 M. A. Zubkov

Recent results for direct searches for physics beyond the Standard Model are reviewed. The results include Tevatron II data up to 1.2 fb-1 and HERA results up to 350 pb-1. Searches for Supersymmetry, for compositeness and for large extra…

高能物理 - 实验 · 物理学 2008-11-26 Elisabetta Gallo

Precision data generally require the threshold for physics beyond the Standard Model to be at the deca-TeV (10 TeV) scale or higher. This raises the question of whether there are interesting deca-TeV models for which the LHC may find direct…

高能物理 - 唯象学 · 物理学 2015-03-20 Hooman Davoudiasl , Thomas McElmurry , Amarjit Soni