نتایج جستجو برای: quark

تعداد نتایج: 30103  

2003
V. P. Gonçalves

We calculate the nuclear inclusive and diffractive cross sections for heavy quark photoproduction within a phenomenological saturation approach. The nuclear cross section is obtained by the extension of the saturation model through Glauber-Gribov formalism. We predict large nuclear heavy quark cross sections at LHC energies.

2008
Hidenori Fukano Koichi Yamawaki

We analyze a straightforward extension of the extended technicolor (ETC) incorporating the top quark condensate via the flavor-universal coloron type topcolor SU(3)1 × SU(3)2 as well as the walking/conformal technicolor. Having quarks and techniquarks assigned to a single SU(3)1, the model has the same ETC structure as that of Appelquist et al. which was shown to have successive ETC breakings t...

2010
Alexi Bazavov Peter Petreczky Alexei Bazavov

We report preliminary results on the chiral and deconfinement aspects of the QCD transition at finite temperature using the Highly Improved Staggered Quark (HISQ) action on lattices with temporal extent of Nτ = 6 and 8. The chiral aspects of the transition are studied in terms of quark condensates and the disconnected chiral susceptibility. We study the deconfinement transition in terms of the ...

2009
Andreas Richter

Transversity and transverse momentum-dependent parton distribution functions (TMDs) are been measured in semi-inclusive deep inelastic scattering (SIDIS) by using a transversely polarized target at the COMPASS experiment. COMPASS is a fixed target experiment at the CERN M2 beamline, which provides a 160 GeV/c polarized μ+ beam. In the years 2002-2004 COMPASS has collected data with a transverse...

Journal: :iranian journal of science and technology (sciences) 2011
n. ghahramany

following our previous presentation of a new three-fold symmetry for derivation of the magic numbers of nuclei based upon a quark state model of nuclei, here the nuclear binding energy is obtained from such new perspective. from this point of view, since each nucleon is made of three quarks, the binding energy of nuclei contains a volume term proportional to 3a (a is mass number). by considerin...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم 1387

چکیده ندارد.

Journal: :Physical review letters 1996
Bander

Possible spin-3/2 quark resonances would have a significant effect on high Et jet production through their contribution to the subprocess q + q̄ → g + g. Such enhancements are compared to a, recently reported, anomaly in inclusive jet production at the CDF detector. PACS numbers: 14.80.-j, 13.87.Ce, 13.85.-t Typeset using REVTEX ∗Electronic address: [email protected] 1 The possible existe...

1995
V V Kiselev

In the framework of renormalon consideration in the approximation of a large number of quark flavours, a role of the anomalous dependence of gluon propagator on the scale µ is shown. In the QCD perturbation theory, an account for the next-to-leading order term over α s is connected with the uncertainty, caused by a choice of the energy scale, determining the α s (µ 2) value, since the transitio...

2005
Yu-Feng Zhou

Abstract We discuss possible parallel textures of the Yukawa coupling matrices in the general two-Higgsdoublet model (2HDM). In those textures the flavor changing neutral currents are naturally suppressed. Motivated by a phenomenologically successful texture with four texture zeros in the standard model, we propose a predictive ansatz for the Yukawa coupling matrices with the same texture in th...

2009
Christian S. Fischer Jens A. Mueller

In this talk we present results on the chiral and the deconfinement transition of quenched QCD from Dyson-Schwinger equations. We determine the ordinary quark condensate signaling the chiral transition and the dual quark condensate signaling the deconfinement transition from the Landau gauge quark propagator evaluated at generalized boundary conditions. We find only slightly different transitio...

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