Effects of parton intrinsic transverse momentum on photon production in hard-scattering processes

The hard scattering processes appear as back to back jets in pp collisions. The effective transverse momentum of the two hard scattered partons (kt) arises due to the intrinsic transverse momentum of the partons and its broadening. Azimuthal correlations of the neutral clusters (mostly from π0) with transverse energy Et=6.5-18.5 GeV as trigger particles and the charged tracks as associated particles have been measured by the STAR experiment in pp and dAu collisions at [Formula: see text]. Using the di-hadron correlation technique the effect of the cold nuclear matter on [Formula: see text] is discussed. A simulation study from PYTHIA using simple di-jet like clustering is also discussed in context of results of [Formula: see text] from di-hadron correlations and di-jets.

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Direct photon production at low transverse momentum in proton-proton collisions at s=2.76 and 8 TeV

Physical Review C ◽

10.1103/physrevc.99.024912 ◽

2019 ◽

Vol 99 (2) ◽

Cited By ~ 6

Author(s):

S. Acharya ◽

F. T.-. Acosta ◽

D. Adamová ◽

J. Adolfsson ◽

M. M. Aggarwal ◽

...

Keyword(s):

Transverse Momentum ◽

Photon Production ◽

Direct Photon ◽

Proton Proton ◽

Proton Collisions ◽

Direct Photon Production ◽

8 Tev ◽

Proton Proton Collisions

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High transverse momentum pion and photon production in pp collisions at ISR energies

Nuclear Physics B ◽

10.1016/0550-3213(81)90534-4 ◽

1981 ◽

Vol 181 (3) ◽

pp. 421-449 ◽

Cited By ~ 13

Author(s):

R.R. Horgan ◽

P.N. Scharbach

Keyword(s):

Transverse Momentum ◽

Photon Production ◽

High Transverse Momentum ◽

Pp Collisions

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The magnitude of the parton intrinsic transverse momentum

Physics Letters B ◽

10.1016/0370-2693(80)90449-9 ◽

1980 ◽

Vol 91 (2) ◽

pp. 275-279 ◽

Cited By ~ 8

Author(s):

W.J. Metcalf ◽

I.J.R. Aitchison ◽

J. LeBritton ◽

D. McCal ◽

A.C. Melissinos ◽

...

Keyword(s):

Transverse Momentum ◽

Intrinsic Transverse Momentum

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Investigating the Prompt Photon Production at the LHC Energies

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194517600618 ◽

2017 ◽

Vol 45 ◽

pp. 1760061

Author(s):

Glauber S. dos Santos ◽

Magno V. T. Machado

Keyword(s):

Transverse Momentum ◽

Cross Section ◽

Photon Production ◽

Prompt Photon ◽

Dipole Cross Section ◽

High Energies ◽

Color Dipole ◽

Momentum Distributions

We investigate the rapidity and transverse momentum distributions of the prompt photon production at the LHC energies considering the color dipole approach. We compare the predictions from distinct models for the dipole cross section, where parton saturation models at high energies are expected to be important at the forward rapidities in [Formula: see text] and [Formula: see text] collisions at the LHC.

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Intrinsic transverse momentum and the polarized Drell-Yan process

Physical Review D ◽

10.1103/physrevd.51.3357 ◽

1995 ◽

Vol 51 (7) ◽

pp. 3357-3372 ◽

Cited By ~ 93

Author(s):

R. D. Tangerman ◽

P. J. Mulders

Keyword(s):

Transverse Momentum ◽

Intrinsic Transverse Momentum

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SEARCHING FOR THE PROPERTIES OF NUCLEAR MATTER USING PROTON–CARBON AND DEUTERON–CARBON COLLISIONS AT 4.2A GeV/c

International Journal of Modern Physics E ◽

10.1142/s0218301312500954 ◽

2012 ◽

Vol 21 (12) ◽

pp. 1250095 ◽

Cited By ~ 21

Author(s):

M. AJAZ ◽

M. K. SULEYMANOV ◽

K. H. KHAN ◽

A. ZAMAN

Keyword(s):

Transverse Momentum ◽

Nuclear Matter ◽

Power Law ◽

Short Range ◽

Cascade Model ◽

Hard Scattering ◽

Effect Analysis ◽

Half Angle ◽

Short Range Correlations

The present work reports the use of nuclear transparency effect of protons in proton– and deuteron–carbon interactions at 4.2A GeV /c to get information about the states of nuclear matter. The "half-angle" technique is used to extract the information on nuclear transparency. The results are compared with Dubna version of Cascade model. The average values of multiplicity, momentum and transverse momentum of protons are analyzed as a function of the number of identified protons in an event. We observed some evidence and trends in the data, which could be considered as transparency effect. Analysis of the results shows that the leading effect is the basis of the observed transparency. Some contribution to the observed effect could be the existing short range correlations and the scaling power law s-N, for exclusive two-body hard scattering.

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