scholarly journals High energy resummation of transverse momentum distributions: Higgs in gluon fusion

2016 ◽  
Vol 2016 (3) ◽  
Author(s):  
Stefano Forte ◽  
Claudio Muselli
Keyword(s):  
Transverse Momentum ◽  
Gluon Fusion ◽  
High Energy ◽  
Momentum Distributions

scholarly journals The production of charged-kaon pairs in proton–antiproton collisions: The role of higher-twist mechanism

2018 ◽  
Vol 33 (28) ◽  
pp. 1850166 ◽  
Author(s):  
M. Demirci ◽  
A. I. Ahmadov
Keyword(s):  
Transverse Momentum ◽  
Pair Production ◽  
Quark Model ◽  
Inclusive Cross Section ◽  
Gluon Fusion ◽  
High Energy ◽  
Light Front ◽  
Charged Kaon ◽  
Proton Antiproton ◽  
Direct Production

The higher-twist (HT) contribution to the charged-kaon pair production in the high energy proton–antiproton collisions at large transverse momentum [Formula: see text] is investigated by using the frozen coupling constant approach for various kaon distribution amplitudes (DAs), which are predicted by light-cone formalism, the light-front quark model, the nonlocal chiral quark model and the light-front holographic AdS/CFT approach. In the numerics, the dependencies of the HT contribution on the transverse momentum [Formula: see text], the rapidity [Formula: see text], and the variable [Formula: see text] are discussed with special emphasis put on DAs. The HT contribution is also compared with the leading-twist ones. It is shown that the HT contributions are dependent on the kaon DAs and also some other phenomenological parameters such as momentum cutoff parameter [Formula: see text]. Inclusive kaon pair production presents a remarkable test case in which HT terms dominate those of LT in certain kinematic regions. The HT direct production process via gluon–gluon fusion contributes significantly to the inclusive cross-section at large [Formula: see text].

Transverse-Momentum Distributions in High-Energy Collisions

1973 ◽  
Vol 7 (1) ◽  
pp. 133-139
Author(s):  
L. M. Saunders ◽  
Davison E. Soper
Keyword(s):  
Transverse Momentum ◽  
High Energy ◽  
Momentum Distributions ◽  
High Energy Collisions

scholarly journals Freeze-Out Parameters in Heavy-Ion Collisions at AGS, SPS, RHIC, and LHC Energies

2015 ◽  
Vol 2015 ◽  
pp. 1-20 ◽  
Author(s):  
Sandeep Chatterjee ◽  
Sabita Das ◽  
Lokesh Kumar ◽  
D. Mishra ◽  
Bedangadas Mohanty ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Ion Collisions ◽  
Momentum Distributions ◽  
Chemical Freeze ◽  
Freeze Out

We review the chemical and kinetic freeze-out conditions in high energy heavy-ion collisions for AGS, SPS, RHIC, and LHC energies. Chemical freeze-out parameters are obtained using produced particle yields in central collisions while the corresponding kinetic freeze-out parameters are obtained using transverse momentum distributions of produced particles. For chemical freeze-out, different freeze-out scenarios are discussed such as single and double/flavor dependent freeze-out surfaces. Kinetic freeze-out parameters are obtained by doing hydrodynamic inspired blast wave fit to the transverse momentum distributions. The beam energy and centrality dependence of transverse energy per charged particle multiplicity are studied to address the constant energy per particle freeze-out criteria in heavy-ion collisions.

scholarly journals Transverse Momentum Distributions of Final-State Particles Produced in Soft Excitation Process in High Energy Collisions

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Fu-Hu Liu ◽  
Ya-Hui Chen ◽  
Hua-Rong Wei ◽  
Bao-Chun Li
Keyword(s):  
Transverse Momentum ◽  
Quantum Effect ◽  
Hadron Collider ◽  
Heavy Ion ◽  
High Energy ◽  
Ideal Gas ◽  
Relativistic Heavy Ion Collider ◽  
Final State ◽  
Momentum Distributions ◽  
High Energy Collisions

Transverse momentum distributions of final-state particles produced in soft process in proton-proton (pp) and nucleus-nucleus (AA) collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies are studied by using a multisource thermal model. Each source in the model is treated as a relativistic and quantum ideal gas. Because the quantum effect can be neglected in investigation on the transverse momentum distribution in high energy collisions, we consider only the relativistic effect. The concerned distribution is finally described by the Boltzmann or two-component Boltzmann distribution. Our modeling results are in agreement with available experimental data.

Production of negatively charged particles in nucleus–nucleus collisions at 200A GeV

2002 ◽  
Vol 80 (5) ◽  
pp. 525-532
Author(s):  
F -H Liu
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Charged Particles ◽  
High Energy ◽  
Momentum Distributions

Three isotropic emission fireballs are used to describe the rapidity (or pseudorapidity) and transverse momentum distributions of negatively charged particles produced in nucleus–nucleus collisions at high energy. The calculated results are compared and shown to be in agreement with the experimental data of 16O–Au, 32S–S, and 32S–Ag collisions at 200A GeV. PACS Nos.: 25.75-q, 24.10Pa

scholarly journals Threshold resummation of transverse momentum distributions beyond next-to-leading log

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Stefano Forte ◽  
Giovanni Ridolfi ◽  
Simone Rota
Keyword(s):  
Renormalization Group ◽  
Transverse Momentum ◽  
General Expression ◽  
Momentum Distribution ◽  
Gluon Fusion ◽  
Transverse Momentum Distribution ◽  
Leading Order ◽  
Final State ◽  
Threshold Resummation ◽  
Momentum Distributions

Abstract We derive a general expression for the threshold resummation of transverse momentum distributions for processes with a colorless final state, by suitably generalizing the renormalization-group based approach to threshold resummation previously pursued by two of us. The ensuing expression holds to all logarithmic orders, and it can be used to extend available results in the literature, which only hold up to the next-to-leading log (NLL) level. We check agreement of our result with the existing NLL result, as well as against the known fixed next-to-leading order results for the Higgs transverse momentum distribution in gluon fusion, and we provide explicit expressions at the next-to-next-to-leading log level.

A hydrodynamic model including phase transition and the thermal motion-induced transverse momentum distributions in high energy heavy ion collisions

2017 ◽  
Vol 26 (07) ◽  
pp. 1750045
Author(s):  
Z. J. Jiang ◽  
J. Q. Hui ◽  
Y. Zhang
Keyword(s):  
Phase Transition ◽  
Transverse Momentum ◽  
Hydrodynamic Model ◽  
Good Description ◽  
Heavy Ion ◽  
High Energy ◽  
Thermal Motion ◽  
Ion Collisions ◽  
Momentum Distributions ◽  
Theoretical Predictions

By taking into account the effects of thermal motion, the transverse momentum distributions of identified charged particles produced in nucleus collisions are discussed in the context of a hydrodynamic model including phase transition. A comparison is made between the theoretical predictions and experimental measurements. The theoretical model gives a good description to the data collected in Au–Au collisions at RHIC energy of [Formula: see text][Formula: see text]GeV. For Pb–Pb collisions at LHC energy of [Formula: see text][Formula: see text]TeV, the model works well up to the transverse momentum of about [Formula: see text][Formula: see text]GeV/c.

Some Aspects of Transverse Momentum Distributions of Particles Produced in High Energy Nucleon–Nucleus Interactions

1974 ◽  
Vol 52 (14) ◽  
pp. 1261-1264 ◽  
Author(s):  
I. Ahmad ◽  
M. Zafar ◽  
M. Irfan ◽  
M. Shafi
Keyword(s):  
Transverse Momentum ◽  
Nucleon Nucleon ◽  
High Energy ◽  
Momentum Distributions

The pt distributions of pions, protons, deuterons, tritons, and 3He produced in interactions of 24 GeV/c protons with heavy emulsion nuclei have been experimentally investigated. The dependence of [Formula: see text] on the shower multiplicity, the angle of emission, and on the mass of the particles has been studied. The characteristics of pions have been observed to be similar to those produced in hadron–hadron interactions. It has been concluded that perhaps the pickup process is responsible for the production of heavier fragments and that most of the pions are produced in the first basic nucleon–nucleon collisions.

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