scholarly journals Heavy quark distribution functions in heavy baryons

2001 ◽  
Vol 64 (9) ◽  
Author(s):  
X.-H. Guo ◽  
A. W. Thomas ◽  
A. G. Williams
Keyword(s):  
Heavy Quark ◽  
Quark Distribution ◽  
Distribution Functions ◽  
Heavy Baryons

scholarly journals Heavy-flavor hadro-production with heavy-quark masses renormalized in the $$ \overline{\mathrm{MS}} $$, MSR and on-shell schemes

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
M. V. Garzelli ◽  
L. Kemmler ◽  
S. Moch ◽  
O. Zenaiev
Keyword(s):  
Heavy Quark ◽  
Cross Sections ◽  
Top Quark ◽  
Quark Mass ◽  
Production Cross ◽  
Hadron Collider ◽  
Distribution Functions ◽  
Heavy Flavor ◽  
Parton Distribution Functions ◽  
Heavy Quark Mass

Abstract We present predictions for heavy-quark production at the Large Hadron Collider making use of the $$ \overline{\mathrm{MS}} $$ MS ¯ and MSR renormalization schemes for the heavy-quark mass as alternatives to the widely used on-shell renormalization scheme. We compute single and double differential distributions including QCD corrections at next-to-leading order and investigate the renormalization and factorization scale dependence as well as the perturbative convergence in these mass renormalization schemes. The implementation is based on publicly available programs, MCFM and xFitter, extending their capabilities. Our results are applied to extract the top-quark mass using measurements of the total and differential $$ t\overline{t} $$ t t ¯ production cross-sections and to investigate constraints on parton distribution functions, especially on the gluon distribution at low x values, from available LHC data on heavy-flavor hadro-production.

scholarly journals Non-Relativistic Model for the Semileptonic Λb→Λc Decay

1997 ◽  
Vol 12 (03) ◽  
pp. 195-204 ◽  
Author(s):  
Debrupa Chakraverty ◽  
Triptesh De ◽  
Binayak Dutta-Roy ◽  
K. S. Gupta
Keyword(s):  
Heavy Quark ◽  
Decay Width ◽  
Branching Ratio ◽  
Relativistic Model ◽  
Heavy Quark Symmetry ◽  
Heavy Baryons

We calculate the decay width for [Formula: see text] in the framework of a non-relativistic quark (NRQ) model of heavy baryons where the light quarks play the role of spectators. Our calculation does not make an explicit use of the heavy quark symmetry. The branching ratio for the above process as calculated here agrees reasonably well with the experimental value.

scholarly journals Valence-quark distribution functions in the kaon and pion

2016 ◽  
Vol 93 (7) ◽  
Author(s):  
Chen Chen ◽  
Lei Chang ◽  
Craig D. Roberts ◽  
Shaolong Wan ◽  
Hong-Shi Zong
Keyword(s):  
Valence Quark ◽  
Quark Distribution ◽  
Distribution Functions

HEAVY PENTAQUARKS AND DOUBLY HEAVY BARYONS IN QUASIPARTICLE APPROACH

2012 ◽  
Vol 27 (01) ◽  
pp. 1250006 ◽  
Author(s):  
A. CHANDRA ◽  
A. BHATTACHARYA ◽  
B. CHAKRABARTI
Keyword(s):  
Heavy Quark ◽  
Flux Tube ◽  
Regge Trajectory ◽  
Ground State ◽  
Tube Model ◽  
Regge Trajectories ◽  
Heavy Baryons ◽  
Good Agreement

In the framework of the quasiparticle approach, the ground state mass of heavy pentaquarks have been investigated in diquark–diquark–antiquark picture and the higher states are investigated in the mass loaded flux tube model where two light diquarks are supposed to be linked by a flux tube to the heavy quark. The Regge trajectories for heavy pentaquarks have been studied. The Regge slope (α) of these particles have been obtained as ≈1 GeV2 which indicates that the Regge trajectory follows the linearity conditions with universal value of α (~ 1 GeV2). The ground state mass of doubly charm and doubly bottom baryons like [Formula: see text] have also been investigated in quasiparticle approach. The results are found to be in reasonably good agreement with the experimental and other theoretical estimates.

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