Fragmentation of heavy quarks in polarized quarkonium in the effective heavy quark theory

1996 ◽  
Vol 39 (7) ◽  
pp. 683-689
Author(s):  
A. P. Martynenko ◽  
V. A. Saleev
Keyword(s):  
Heavy Quark ◽  
Heavy Quarks ◽  
Quark Theory

scholarly journals A Survey of Heavy Quark Theory for PDF Analyses

2012 ◽  
Vol 222-224 ◽  
pp. 52-60 ◽  
Author(s):  
K. Kovařík ◽  
T. Stavreva ◽  
A. Kusina ◽  
T. Jezo ◽  
F.I. Olness ◽  
...  
Keyword(s):  
Heavy Quark ◽  
Quark Theory

POLARIZED HADRO- AND PHOTOPRODUCTION OF HEAVY QUARKS IN NLO QCD

2003 ◽  
Vol 18 (08) ◽  
pp. 1477-1480
Author(s):  
I. BOJAK
Keyword(s):  
Heavy Quark ◽  
Heavy Quarks ◽  
Gluon Helicity ◽  
Shed Light

We present the first calculation of the complete NLO QCD corrections to the production of heavy flavors with longitudinally polarized hadrons. This reaction can be used at RHIC to extract the gluon helicity density and may shed light on the "heavy quark enigma". The theoretical uncertainties are briefly discussed.

scholarly journals High-energy resummation in heavy-quark pair hadroproduction

2019 ◽  
Vol 79 (11) ◽  
Author(s):  
A. D. Bolognino ◽  
Francesco Giovanni Celiberto ◽  
M. Fucilla ◽  
D. Yu. Ivanov ◽  
A. Papa
Keyword(s):  
Heavy Quark ◽  
Cross Section ◽  
Center Of Mass ◽  
High Energy ◽  
Heavy Quarks ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Large Separation ◽  
Bfkl Approach ◽  
Heavy Quark Pair

AbstractThe inclusive hadroproduction of two heavy quarks, featuring a large separation in rapidity, is proposed as a novel probe channel of the Balitsky–Fadin–Kuraev–Lipatov (BFKL) approach. In a theoretical setup which includes full resummation of leading logarithms in the center-of-mass energy and partial resummation of the next-to-leading ones, predictions for the cross section and azimuthal coefficients are presented for kinematic configurations typical of current and possible future experimental analyses at the LHC.

scholarly journals QCD sum rules in the effective heavy quark theory

1992 ◽  
Vol 278 (4) ◽  
pp. 457-464 ◽  
Author(s):  
E. Bagan ◽  
Patricia Ball ◽  
V.M. Braun ◽  
H.G. Dosch
Keyword(s):  
Heavy Quark ◽  
Sum Rules ◽  
Qcd Sum Rules ◽  
Quark Theory

Spectroscopy of heavy quark hadrons

2014 ◽  
Vol 23 (07) ◽  
pp. 1461007
Author(s):  
Makoto Oka
Keyword(s):  
Heavy Quark ◽  
Bound States ◽  
Heavy Quarks ◽  
P Wave ◽  
Charmed Baryon ◽  
Hadron Spectroscopy ◽  
Distinct Features

Heavy quarks play special roles in the hadron spectroscopy. Some distinct features of heavy quark dynamics and their significance in the P-wave baryons with a single heavy quark are discussed. We also explore a new color configuration in exotic tetra-quark mesons with two heavy quarks. Finally, possibility of bound states of a charmed baryon with a nucleon and nuclei are examined.

scholarly journals SYMMETRIES AND SYSTEMATICS OF DOUBLY HEAVY HADRONS

2012 ◽  
Vol 27 (08) ◽  
pp. 1250039 ◽  
Author(s):  
B. EAKINS ◽  
W. ROBERTS
Keyword(s):  
Experimental Data ◽  
Excitation Energy ◽  
Heavy Quark ◽  
Quark Model ◽  
Strange Quark ◽  
Heavy Meson ◽  
Heavy Quarks ◽  
Heavy Mesons ◽  
Heavy Baryons

We discuss the extension of the superflavor symmetry of doubly heavy baryons to states which contain an excited heavy diquark and we examine some of the consequences of this symmetry for the spectra of doubly heavy baryons and heavy mesons. We explore the ramifications of a proposed symmetry that relates heavy diquarks to doubly heavy mesons. We present a method for determining how the excitation energy of a system containing two heavy quarks will scale as one changes the strength of the interactions and the reduced mass of the system. We use this to derive consequences of the heavy diquark-doubly heavy meson symmetry. We compare these consequences to the results of a quark model as well as the experimental data for doubly and singly heavy mesons. We also discuss the possibility of treating the strange quark as a heavy quark and apply the ideas developed here to strange hadrons.

scholarly journals ON THE MOTION OF HEAVY QUARKS INSIDE HADRONS: UNIVERSAL DISTRIBUTIONS AND INCLUSIVE DECAYS

1994 ◽  
Vol 09 (14) ◽  
pp. 2467-2504 ◽  
Author(s):  
I.I. BIGI ◽  
M.A. SHIFMAN ◽  
N.G. URALTSEV ◽  
A.L. VAINSHTEIN
Keyword(s):  
Lower Bound ◽  
Kinetic Energy ◽  
Heavy Quark ◽  
Heavy Quarks ◽  
Nucleon Scattering ◽  
Fermi Motion ◽  
Inclusive Decays ◽  
Model Independent ◽  
Similarities And Differences

In previous papers we have pointed out that there exists a QCD analog of the phenomenological concept of the so-called Fermi motion for the heavy quark inside a hadron. Here we show in a more detailed way how this comes about and we analyze the limitations of this concept. Nonperturbative as well as perturbative aspects are included. We emphasize both similarities and differences to the well-known treatment of deep inelastic lepton-nucleon scattering. We derive a model-independent lower bound on the kinetic energy of the heavy quark inside the hadron.

scholarly journals Lifetimes and heavy quark expansion

2015 ◽  
Vol 30 (10) ◽  
pp. 1543005 ◽  
Author(s):  
Alexander Lenz
Keyword(s):  
Heavy Quark ◽  
Experimental Tests ◽  
Heavy Quarks ◽  
Experimental Results ◽  
Current Status ◽  
Matrix Elements ◽  
Weak Decays ◽  
The Subject

Kolya Uraltsev was one of the inventors of the Heavy Quark Expansion (HQE), that describes inclusive weak decays of hadrons containing heavy quarks and in particular lifetimes. Besides giving a pedagogic introduction to the subject, we review the development and the current status of the HQE, which just recently passed several non-trivial experimental tests with an unprecedented precision. In view of many new experimental results for lifetimes of heavy hadrons, we also update several theory predictions: [Formula: see text], τ(Bs)/τ(Bd) = 1.001 ±0.002, τ(Λb)/τ(Bd) = 0.935 ±0.054 and [Formula: see text]. The theoretical precision is currently strongly limited by the unknown size of the non-perturbative matrix elements of four-quark operators, which could be determined with lattice simulations.

scholarly journals Heavy-quark dynamics in a hydrodynamically evolving medium

2018 ◽  
Vol 171 ◽  
pp. 04003
Author(s):  
Marlene Nahrgang ◽  
Jörg Aichelin ◽  
Pol Bernard Gossiaux ◽  
Klaus Werner
Keyword(s):  
Heavy Quark ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Heavy Quarks ◽  
Collective Flow ◽  
Recent Advances

In this talk we will discuss the recent advances in describing heavy-quark dynamics in the quark-gluon plasma (QGP), which evolves hydrodynamically. Special emphasis is put on the collective flow of the heavy-quarks with the medium constituents, for which we present our latest results obtained within the MC@sHQ+EPOS2 model at √s = 5 TeV.

PHOTOPRODUCTION OF HEAVY QUARKS AS A TOOL FOR INVESTIGATION OF THE SPIN-DEPENDENT GLUON DISTRIBUTIONS

1993 ◽  
Vol 08 (09) ◽  
pp. 1603-1612 ◽  
Author(s):  
S.I. ALEKHIN ◽  
V.I. BORODULIN ◽  
S.F. SULTANOV
Keyword(s):  
Heavy Quark ◽  
Heavy Quarks ◽  
Heavy Quark Production ◽  
Fixed Target ◽  
Polarization Asymmetry ◽  
Quark Production ◽  
Gluon Distributions ◽  
Polarized Gluon

The possibility for measuring polarized gluon distributions in the process of heavy quark production in the scattering of real photons off polarized fixed target has been considered. The estimates of γ-beam intensities required to determine the polarization asymmetry have been made.

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