scholarly journals Probing nuclear modifications of parton distribution functions through the isolated prompt photon production at energies available at the CERN Large Hadron Collider

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
Muhammad Goharipour ◽  
S. Rostami
Keyword(s):  
Large Hadron Collider ◽  
Parton Distribution ◽  
Hadron Collider ◽  
Photon Production ◽  
Distribution Functions ◽  
Prompt Photon ◽  
Parton Distribution Functions ◽  
Cern Large Hadron Collider ◽  
Nuclear Modifications

scholarly journals Diffractive $$\gamma \gamma $$ production in pp collisions at the LHC

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
V. P. Gonçalves ◽  
D. E. Martins ◽  
M. S. Rangel
Keyword(s):  
Transverse Momentum ◽  
Large Hadron Collider ◽  
Invariant Mass ◽  
Parton Distribution ◽  
Hadron Collider ◽  
Distribution Functions ◽  
Pp Collisions ◽  
Parton Distribution Functions ◽  
Momentum Distributions

AbstractIn this letter we estimate the contribution of the double diffractive processes for the diphoton production in pp collisions at the large hadron collider (LHC). The acceptance of the central and forward LHC detectors is taken into account and predictions for the invariant mass, rapidity and, transverse momentum distributions are presented. A comparison with the predictions for the light-by-light (LbL) scattering and exclusive diphoton production is performed. We demonstrate that the events associated to double diffractive processes can be separated and its study can be used to constrain the behavior of the diffractive parton distribution functions.

UNCERTAINTY OF POLARIZED PARTON DISTRIBUTIONS

2003 ◽  
Vol 18 (08) ◽  
pp. 1203-1210 ◽  
Author(s):  
◽  
M. HIRAI ◽  
Y. GOTO ◽  
T. HORAGUCHI ◽  
H. KOBAYASHI ◽  
...  
Keyword(s):  
Experimental Data ◽  
Parton Distribution ◽  
Gluon Distribution ◽  
Distribution Functions ◽  
Prompt Photon ◽  
Parton Distribution Functions ◽  
Parton Distributions ◽  
Photon Process ◽  
Hessian Method ◽  
Polarized Gluon

Polarized parton distribution functions are determined by a χ2 analysis of polarized deep inelastic experimental data. In this paper, uncertainty of obtained distribution functions is investigated by a Hessian method. We find that the uncertainty of the polarized gluon distribution is fairly large. Then, we estimate the gluon uncertainty by including the fake data which are generated from prompt photon process at RHIC. We observed that the uncertainty could be reduced with these data.

scholarly journals Electroweak gauge-boson production in association with b jets at Hadron Colliders

2015 ◽  
Vol 30 (16) ◽  
pp. 1530042 ◽  
Author(s):  
F. Febres Cordero ◽  
L. Reina
Keyword(s):  
Large Hadron Collider ◽  
Gauge Boson ◽  
Hadron Collider ◽  
New Physics ◽  
Distribution Functions ◽  
Experimental Measurements ◽  
Cern Large Hadron Collider ◽  
Electroweak Gauge Boson ◽  
Theoretical Predictions ◽  
B Quark

The production of both charged and neutral electroweak gauge bosons in association with b jets has attracted a lot of experimental and theoretical attention in recent years because of its central role in the physics programs of both the Fermilab Tevatron and the CERN Large Hadron Collider. The improved level of accuracy achieved both in the theoretical predictions and experimental measurements of these processes can promote crucial developments in modeling b-quark jets and b-quark parton distribution functions, and can provide a more accurate description of some of the most important backgrounds to the measurement of Higgs-boson couplings and several new physics searches. In this paper, we review the status of theoretical predictions for cross sections and kinematic distributions of processes in which an electroweak gauge boson is produced in association with up to two b jets in hadronic collisions, namely [Formula: see text], pp → V + 1b jet and [Formula: see text], pp → V + 2b jets with V = W±, Z/γ*, γ. Available experimental measurements at both the Fermilab Tevatron and the CERN Large Hadron Collider are also reviewed and their comparison with theoretical predictions is discussed.

scholarly journals Lepton-quark fusion at Hadron colliders, precisely

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Admir Greljo ◽  
Nudžeim Selimović
Keyword(s):  
Cross Section ◽  
Parton Distribution ◽  
Opposite Sign ◽  
Production Cross ◽  
Hadron Collider ◽  
Distribution Functions ◽  
Hadron Colliders ◽  
Parton Distribution Functions ◽  
Scalar Leptoquark ◽  
Wide Range

Abstract When a TeV-scale leptoquark has a sizeable Yukawa coupling, its dominant production mechanism at hadron colliders is the partonic-level lepton-quark fusion. Even though the parton distribution functions for leptons inside the proton are minuscule, they get compensated by the resonant enhancement. We present the first computation of higher order radiative corrections to the resonant leptoquark production cross section at the Large Hadron Collider (LHC). Next-to-leading (NLO) QCD and QED corrections are similar in size but come with the opposite sign. We compute NLO K-factors for a wide range of scalar leptoquark masses, as well as, all possible combinations of quark and lepton flavors and leptoquark charges. Theoretical uncertainties due to the renormalisation and factorisation scale variations and the limited knowledge of parton distribution functions are quantified. We finally discuss how to disentangle the flavor structure of leptoquark interactions by exploiting the interplay between different production channels.

scholarly journals Nuclear effects in prompt photon production at the Large Hadron Collider

2002 ◽  
Vol 700 (1-2) ◽  
pp. 523-538 ◽  
Author(s):  
J. Jalilian-Marian ◽  
K. Orginos ◽  
I. Sarcevic
Keyword(s):  
Large Hadron Collider ◽  
Hadron Collider ◽  
Photon Production ◽  
Prompt Photon ◽  
Nuclear Effects

scholarly journals Study of the Polarized Gluon Structure of a Proton via Prompt-Photon Production in the SPD Experiment at the NICA Collider

2019 ◽  
Vol 64 (7) ◽  
pp. 631 ◽  
Author(s):  
A. Rymbekova
Keyword(s):  
Parton Distribution ◽  
Distribution Functions ◽  
Prompt Photon ◽  
Hard Scattering ◽  
Parton Distribution Functions ◽  
Proton Proton ◽  
Proton Collisions ◽  
Polarized Proton ◽  
Proton Proton Collisions ◽  
Nica Collider

Photons produced in the hard scattering of partons, named prompt photons, provide information about the internal structure of hadrons. The NICA collider has the possibility to provide new data to study the production of prompt photons in non-polarized and polarized proton-proton collisions, which gives an access to spin-dependent parton distribution functions for gluons. Unpolarized and polarized physics with prompt photons and capabilities of the SPD detector in such measurements is discussed.

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