scholarly journals Gluon fragmentation into spin-tripletS-wave quarkonium

1995 ◽  
Vol 52 (11) ◽  
pp. 6627-6629 ◽  
Author(s):  
Eric Braaten ◽  
Tzu Chiang Yuan
Keyword(s):  
Spin Triplets ◽  
Gluon Fragmentation

scholarly journals CHARMONIUM PRODUCTION AT THE LHC

1996 ◽  
Vol 11 (19) ◽  
pp. 1555-1562 ◽  
Author(s):  
K. SRIDHAR
Keyword(s):  
Cross Section ◽  
Event Rate ◽  
Charm Quark ◽  
Large Transverse Momentum ◽  
Fragmentation Mechanism ◽  
Charmonium Production ◽  
Quark Fragmentation ◽  
Gluon Production ◽  
Gluon Fragmentation ◽  
Important Test

The analyses of large transverse momentum charmonium production at the Tevatron have shown that fragmentation of gluons is an important production mechanism. We study large-pT charmonium production in pp collisions at the LHC, and find that due to the copious gluon production at this energy, the gluon fragmentation contribution completely overwhelms the fusion contribution and the charm quark fragmentation contribution. Our analysis shows that for J/ψ production at the LHC, there is a significant event rate even for pT ~ 100 GeV. The measurement of the cross-section at such large values of pT will provide a very important test of the fragmentation mechanism.

scholarly journals NLO QCD corrections to gluon fragmentation function into η and η based on the Suzuki's model

2020 ◽  
Vol 956 ◽  
pp. 115036 ◽  
Author(s):  
S. Mohammad Moosavi Nejad ◽  
Maryam Roknabady ◽  
Mahdi Delpasand
Keyword(s):  
Fragmentation Function ◽  
Gluon Fragmentation

scholarly journals STUDY OF VECTOR MESON FRAGMENTATION USING A BROKEN SU(3) MODEL

2012 ◽  
Vol 27 (19) ◽  
pp. 1250103 ◽  
Author(s):  
D. INDUMATHI ◽  
H. SAVEETHA
Keyword(s):  
Quark Gluon Plasma ◽  
Light Quark ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Dglap Evolution ◽  
Relativistic Heavy Ion Collider ◽  
Breaking Parameter ◽  
Fragmentation Functions ◽  
Scaled Energy ◽  
Gluon Fragmentation

Inclusive hadro-production in e+e- annihilation processes is examined to study the fragmentation process. A broken SU(3) model is used to determine the quark and gluon fragmentation functions of octet vector mesons, ρ and K*, in a simple way with an SU(3) breaking parameter λ. These are expressed in terms of just two light quark fragmentation functions, V(x, Q2) and γ(x, Q2) and the gluon fragmentation function Dg(x, Q2). These functions are parametrized at the low input scale of [Formula: see text], evolved through LO DGLAP evolution including charm and bottom flavor at appropriate thresholds, and fitted by comparison with data at the Z-pole. The model is extended with the introduction of a few additional parameters to include a study of singlet–octet mixing and hence ω and ϕ fragmentation. The model gives good fits to the available data for x ≳0.01, where x is the scaled energy of the hadron. The model is then applied successfully to ω, ϕ production in pp collisions at the relativistic heavy ion collider, RHIC, these data form an important baseline for the study of Quark Gluon Plasma in heavy nucleus collisions at RHIC, and also in future at the LHC.

scholarly journals Quark fragmentation into spin-tripletS-wave quarkonium

2015 ◽  
Vol 91 (7) ◽  
Author(s):  
Geoffrey T. Bodwin ◽  
Hee Sok Chung ◽  
U-Rae Kim ◽  
Jungil Lee
Keyword(s):  
Quark Fragmentation ◽  
Spin Triplets

EXCHANGE BROADENING OF SPIN–SPIN TRIPLETS IN NUCLEAR MAGNETIC RESONANCE SPECTRA. APPLICATION TO THE SYSTEM ETHANOL–WATER

1963 ◽  
Vol 41 (3) ◽  
pp. 714-720 ◽  
Author(s):  
W. G. Paterson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Proton Exchange ◽  
Average Lifetime ◽  
Hydroxyl Proton ◽  
A Value ◽  
Nuclear Magnetic Resonance Spectra ◽  
Spin Triplets ◽  
Exchange Broadening ◽  
Nuclear Magnetic

Using an extension of the method of McConnell (1), an expression is derived for the nuclear magnetic resonance spectrum of a hydroxyl proton in a —CH2OH group which is undergoing intermolecular exchange. A graphical method is presented which enables a rapid evaluation of τ, the average lifetime of a hydroxyl proton between exchange events. Measurements of line widths and multiplet spacings in the n.m.r. spectra of ethanol—water solutions are interpreted in terms of the proton exchange reaction[Formula: see text]for which a value of 2.7 1. mole−1 sec−1 at 42 ± 1 °C is suggested as an upper limit to the rate constant.

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