scholarly journals Pion valence quark distribution from current-current correlation in lattice QCD

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Raza Sabbir Sufian ◽  
Colin Egerer ◽  
Joseph Karpie ◽  
Robert G. Edwards ◽  
Bálint Joó ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Valence Quark ◽  
Quark Distribution ◽  
Current Correlation

scholarly journals Valence-quark distribution of the kaon and pion from lattice QCD

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Huey-Wen Lin ◽  
Jiunn-Wei Chen ◽  
Zhouyou Fan ◽  
Jian-Hui Zhang ◽  
Rui Zhang
Keyword(s):  
Lattice Qcd ◽  
Valence Quark ◽  
Quark Distribution

scholarly journals Pion valence quark distribution from matrix element calculated in lattice QCD

2019 ◽  
Vol 99 (7) ◽  
Author(s):  
Raza Sabbir Sufian ◽  
Joseph Karpie ◽  
Colin Egerer ◽  
Kostas Orginos ◽  
Jian-Wei Qiu ◽  
...  
Keyword(s):  
Matrix Element ◽  
Lattice Qcd ◽  
Valence Quark ◽  
Quark Distribution

scholarly journals Direct lattice-QCD calculation of pion valence quark distribution

2019 ◽  
Author(s):  
Jianhui Zhang ◽  
Jiunn-Wei Chen ◽  
Luchang Jin ◽  
Huey-Wen Lin ◽  
Andreas Schäfer ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Valence Quark ◽  
Quark Distribution ◽  
Direct Lattice

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

scholarly journals An estimate for the thermal photon rate from lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 07044 ◽  
Author(s):  
Bastian B. Brandt ◽  
Anthony Francis ◽  
Tim Harris ◽  
Harvey B. Meyer ◽  
Aman Steinberg
Keyword(s):  
Lattice Qcd ◽  
Spectral Function ◽  
Production Rate ◽  
Vector Current ◽  
Gluon Plasma ◽  
Vector Channel ◽  
New Correlation ◽  
Current Correlation ◽  
Direct Model ◽  
Ill Posed

We estimate the production rate of photons by the quark-gluon plasma in lattice QCD. We propose a new correlation function which provides better control over the systematic uncertainty in estimating the photon production rate at photon momenta in the range πT/2 to 2πT. The relevant Euclidean vector current correlation functions are computed with Nf = 2 Wilson clover fermions in the chirally-symmetric phase. In order to estimate the photon rate, an ill-posed problem for the vector-channel spectral function must be regularized. We use both a direct model for the spectral function and a modelindependent estimate from the Backus-Gilbert method to give an estimate for the photon rate.

scholarly journals An analysis of parton distribution functions of the pion and the kaon with the maximum entropy input

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
Chengdong Han ◽  
Gang Xie ◽  
Rong Wang ◽  
Xurong Chen
Keyword(s):  
Parton Distribution ◽  
Valence Quark ◽  
Quark Distribution ◽  
Parton Model ◽  
Distribution Functions ◽  
Parton Distribution Functions ◽  
Theoretical Predictions ◽  
Gluon Distributions ◽  
Qcd Analysis ◽  
Mass Dependent

AbstractWe present pion and kaon parton distribution functions from a global QCD analysis of the experimental data within the framework of dynamical parton model. We use the DGLAP equations with parton–parton recombination corrections and the valence input of uniform distribution which maximizes the information entropy. At our input scale $$Q_0^2$$ Q 0 2 , there are no sea quark and gluon distributions. All the sea quarks and gluons of the pion and the kaon are completely generated from the parton splitting processes. The mass-dependent parton splitting kernel is applied for the strange quark distribution in the kaon. The obtained valence quark and sea quark distributions at high $$Q^{2}$$ Q 2 ($$Q^2>5$$ Q 2 > 5 GeV$$^2$$ 2 ) are compatible with the existed experimental measurements. Furthermore, the asymptotic behaviours of parton distribution functions at small and large x have been studied for both the pion and the kaon. Lastly, the first three moments of parton distributions at high $$Q^{2}$$ Q 2 scale are calculated, which are consistent with other theoretical predictions.

scholarly journals Basic features of the pion valence-quark distribution function

2014 ◽  
Vol 737 ◽  
pp. 23-29 ◽  
Author(s):  
Lei Chang ◽  
Cédric Mezrag ◽  
Hervé Moutarde ◽  
Craig D. Roberts ◽  
Jose Rodríguez-Quintero ◽  
...  
Keyword(s):  
Distribution Function ◽  
Valence Quark ◽  
Quark Distribution ◽  
Basic Features ◽  
Quark Distribution Function
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