Results 31 to 40 of about 301,458 (227)

Covariant and heavy quark symmetric quark models [PDF]

Physical Review D, 1994
There exist relativistic quark models (potential or MIT-bag) which satisfy the heavy quark symmetry (HQS) relations among meson decay constants and form factors. Covariant construction of the momentum eigenstates, developed here, can correct for spurious center-of-mass motion contributions.Proton form factor and M1 transitions in quarkonia are ...
Tadić, D., Žganec, S.
openaire   +3 more sources

Quark decay top to two bodies

Visión Electrónica, 2019
Is investigated the top quark decay (t) two bodies using the spectator model. Is analyzed the decay (t→bW⁺) calculated theoretically the width of decay and decay fraction of the particle whose result is compared with the experimental data of the table ...
Mauricio Rozo-Clavijo, Carlos Germán Cortés-Hernández, Javier Alberto Olarte-Torres   +2 more
doaj   +1 more source

Top Quark Measurements in CMS [PDF]

, 2014
Measurements involving top quarks provide important tests of QCD. A selected set of top quark measurements in CMS including the strong coupling constant, top quark pole mass, constraints on parton distribution functions, top quark pair differential cross
Yazgan, Efe
core   +4 more sources

Dynamical Quark Effects on Light Quark Masses [PDF]

Physical Review Letters, 2000
4 pages, revtex, 3 eps figures. Double statistics at beta=2.1, error estimates elaborated. Accepted for publication in Phys.
Khan, A A, Aoki, S, Boyd, G, Burkhalter, R, Ejiri, S, Fukugita, M, Hashimoto, S, Ishizuka, N, Iwasaki, Y, Kanaya, K, Kaneko, T, Kuramashi, Y, Manke, T, Nagai, K, Okawa, M, Shanahan, H P, Ukawa, A, Yoshie, T, CP-PACS Collaboration   +18 more
openaire   +10 more sources

Several Effects Unexplained by QCD

Universe, 2018
Several new experimental discoveries in high energy proton interactions, yet unexplained by QCD, are discussed in the paper. The increase of the cross sections with increasing energy from ISR to LHC, the correlation between it and the behavior of the ...
Igor M. Dremin
doaj   +1 more source

Linking generalized parton distributions to constituent quark models [PDF]

, 2002
The link between the nucleon generalized parton distributions and the non-diagonal one-body density matrix in momentum space is studied. Attention is focussed on the region where quark generalized parton distributions (GPD's) describe emission and ...
B. Pasquini, Bakamjian, Belitsky, Boffi, Brodsky, Brodsky, Brodsky, Cardarelli, Chung, Collins, Collins, Conci, Diehl, Diehl, Diehl, Dziembowski, Faccioli, Ferraris, Glozman, Glozman, Goeke, Guidal, Ji, Ji, Ji, Ji, Ji, Keister, Korotkov, M. Traini, Mair, Müller, Pasquini, Penttinen, Petrov, Radyushkin, Radyushkin, Radyushkin, Radyushkin, Radyushkin, S. Boffi, Scopetta, Simula, Steffens, Suzuki, Traini, Traini, Vanderhaeghen, Vanderhaeghen, Wagenbrunn   +49 more
core   +2 more sources

Jet shape and redistribution of the lost energy from jets in Pb + Pb collisions at the LHC in a multiphase transport model

European Physical Journal C: Particles and Fields, 2022
Jet-medium interaction involves two important effects: jet energy loss and medium response. The search for jet-induced medium excitations is one of the hot topics in jet quenching study in relativistic nuclear collisions.
Ao Luo, Ya-Xian Mao, Guang-You Qin, En-Ke Wang, Han-Zhong Zhang   +4 more
doaj   +1 more source

Light hadron spectrum in three-flavor QCD with O(a)-improved Wilson quark action [PDF]

, 2003
We report on a calculation of the light hadron spectrum and quark masses in three-flavor dynamical QCD using the non-perturbatively O(a)-improved Wilson quark action and a renormalization-group improved gauge action. Simulations are carried out on a 16^3
:, Aoki, S., Collaboration, JLQCD, CP-PACS, Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishikawa, T., Ishizuka, N., Iwasaki, Y., Kanaya, K., Kaneko, T., Kuramashi, Y., Okawa, M., Taniguchi, N., Tsutsui, N., Ukawa, A., Yoshie, T.   +17 more
core   +2 more sources

Heavy Quark Fluorescence [PDF]

Physical Review Letters, 2010
Heavy hadrons containing heavy quarks (for example, Upsilon-mesons) feature a scale separation between the heavy quark mass (about 4.5 GeV for the b-quark) and the QCD scale (about 0.3 GeV}) that controls effective masses of lighter constituents. Therefore, as in ordinary molecules, the de-excitation of the lighter, faster degrees of freedom leaves the
Torres Rincón, Juan Miguel, Llanes Estrada, Felipe José   +1 more
openaire   +5 more sources

Polarization Effects In Hadron-Hadron Scatterings

Cumhuriyet Science Journal, 2018
In the case of diffraction scattering of hadrons by hadrons, a nonzeropolarization of the scattered particles arises, which is related to thelogarithmic derivative of the differential scattering cross section.Polarization changes sign in those reactions ...
İ.g. Afandıyeva, Rasim A. Ahmedov
doaj   +1 more source