scholarly journals High transverse momentum η meson production inp+p,d+Au, and Au+Au collisions atsNN=200GeV

2007 ◽  
Vol 75 (2) ◽  
Author(s):  
S. S. Adler ◽  
S. Afanasiev ◽  
C. Aidala ◽  
N. N. Ajitanand ◽  
Y. Akiba ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Meson Production ◽  
High Transverse Momentum

scholarly journals J/ψ meson production in SIDIS: matching high and low transverse momentum

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Daniël Boer ◽  
Umberto D’Alesio ◽  
Francesco Murgia ◽  
Cristian Pisano ◽  
Pieter Taels
Keyword(s):  
Transverse Momentum ◽  
Meson Production ◽  
Distance Matrix ◽  
Inelastic Electron ◽  
High Transverse Momentum ◽  
Shape Functions ◽  
Long Distance ◽  
Collinear Factorization ◽  
Transverse Momentum Dependent ◽  
Gluon Distributions

Abstract We consider the transverse momentum spectrum and the cos 2ϕ azimuthal distribution of J/ψ mesons produced in semi-inclusive, deep-inelastic electron-proton scattering, where the electron and the proton are unpolarized. At low transverse momentum, we propose factorized expressions in terms of transverse momentum dependent gluon distributions and shape functions. We show that our formulae, at the order αs, correctly match with the collinear factorization results at high transverse momentum. The latter are computed at the order $$ {\alpha}_s^2 $$ α s 2 in the framework of nonrelativistic QCD (NRQCD), with the inclusion of the intermediate $$ {}^3{S}_1^{\left[1\right]} $$ 3 S 1 1 color-singlet Fock state, as well as the subleading color-octet ones that are relatively suppressed by a factor v4 in the NRQCD velocity parameter v. We show that the $$ {}^1{S}_0^{\left[8\right]} $$ 1 S 0 8 and $$ {}^3{P}_J^{\left[8\right]} $$ 3 P J 8 (J = 0, 1, 2) contributions diverge in the small transverse momentum region and allow us to determine the perturbative tails of the shape functions, which carry the same quantum numbers. These turn out to be identical, except for the overall magnitude given by the appropriate NRQCD long distance matrix element.

scholarly journals Meson Production in High Energy p+p Collisions at the RHIC Energies

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Bao-Chun Li ◽  
Ya-Zhou Wang ◽  
Er-Qin Wang
Keyword(s):  
Transverse Momentum ◽  
Meson Production ◽  
High Energy ◽  
Maximum Energy ◽  
High Transverse Momentum ◽  
Component Distribution ◽  
Tail Part ◽  
Cylinder Model ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra

Transverse momentum spectra of mesons produced in p+p collisions are studied in the framework of a thermalized cylinder model. In the region of high transverse momentum, the considered distributions have a tail part at the maximum energy of RHIC. A two-component distribution based upon the improved cylinder model is used to fit the experimental data of the PHENIX Collaboration. It is found that the improved approach can describe the meson production in the wider range of transverse momenta.

scholarly journals K*(892)0 and ϕ(1020) meson production at high transverse momentum in pp and Pb-Pb collisions at sNN=2.76 TeV

2017 ◽  
Vol 95 (6) ◽  
Author(s):  
J. Adam ◽  
D. Adamová ◽  
M. M. Aggarwal ◽  
G. Aglieri Rinella ◽  
M. Agnello ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Meson Production ◽  
High Transverse Momentum

HIGH TRANSVERSE MOMENTUM PROCESSES

1973 ◽  
Vol 34 (C1) ◽  
pp. C1-385-C1-399 ◽  
Author(s):  
J. D. BJORKEN
Keyword(s):  
Transverse Momentum ◽  
High Transverse Momentum
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