نتایج جستجو برای: quark
تعداد نتایج: 30103 فیلتر نتایج به سال:
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.
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...
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 ...
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...
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...
چکیده ندارد.
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...
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...
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...
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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