Study Of Transverse Momentum Distribution Research Articles

Transport model study of transverse momentum distributions of (anti-)deuterons production in Au+Au collisions at sNN=14.5, 62.4, and 200 GeV

The transverse momentum distributions of deuterons and anti-deuterons in Au + Au collisions at sNN = 14.5, 62.4 and 200 GeV with different centralities are studied within the framework of the UrQMD model combined with the conventional phase-space coalescence model. A strong reversed correlation between R0 (the maximal relative distances between hadrons) and P0 (the maximal relative momentum between hadrons) can be seen. It is also time-dependent. The number of particles generated are inconsistent with experimental data for 40, −,60% and 60, −,80% centralities because deuterons have plenty of time to react with other particles, this effect becomes more obvious with the decrease of beam energy. Our results can quantitatively describe the STAR data for 0, −,10%, 10, −,20% and 20, −,40% centralities.

Study of transverse momentum distributions in p−Pb interactions at 0.9 TeV and 5.02 TeV

This work is aimed to investigate the transverse momentum ([Formula: see text]) distributions of primary charged particles produced in p[Formula: see text][Formula: see text]Pb collisions at [Formula: see text][Formula: see text]0.9 TeV and 5.02 TeV. In this perspective, we have considered the pseudorapidity [Formula: see text] regions of [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] and the transverse momentum range of [Formula: see text]. In order to check the validity of simulation, we have compared the prediction of EPOS-1.99, EPOS-LHC and QGSJETII-04 models with the measurement of the [Formula: see text] distribution of ALICE experiment at [Formula: see text][Formula: see text]5.02 TeV for [Formula: see text], [Formula: see text], [Formula: see text], and with the CMS experiment for [Formula: see text]. We discovered that all the models overpredict the distribution of the experimental data for [Formula: see text][Formula: see text]5 GeV/c while presenting consistent result with each other at 0.9 TeV as well as 5.02 TeV. For [Formula: see text][Formula: see text]5 GeV/c, the models seem to be consistent with the experimental data where the EPOS-LHC describes both the ALICE and CMS data very well.

Study of transverse momentum distribution of charged particles in 4.5 GeV/c proton-emulsion interactions

The emission of charged particles in 4.5 GeV/c proton-emulsion interactions were investigated. The emulsion plates have been irradiated at Dubna Synchrophasotron‥ The experimental data were obtained at the Laboratory of High Energy Physics (LHEP) at Cairo University. Transverse momentum technique has been used to check the sideward flow of charged particles in the considered reactions. The reaction plane has been determined in each event and the transverse momentum (the momentum component in the azimuthal plane) was projected onto the reaction plane. The dependence of the average-oriented transverse momentum per charged particles, projected onto the reaction plane, on the pseudorapidity were studied. The present work shows a significant sideward flow of charged particles in the region of large pseudorapidity i.e. small values of the space angle (forward cone). The side ward flow of nuclear matter seems to be as a result of the interaction between any two composite particles. A correlation is seen between the direction of flow of the charged particles and the emitted heavy ionized target fragments in proton-emulsion interactions at 4.5 GeV/c.

Study of transverse momentum spectrum of proton projectile fragments in 4.5A GeV/c12C-Emulsion interactions. Evidence of a single temperature

This work reports a study of transverse momentum distribution of relativistic proton fragments emerging from the interaction of12C with nuclear emulsion at 4.5A GeV/c energy. A comparison of transverse momentum spectrum with the Maxwell-Boltzmann distribution reveals a temperature of about 8 MeV. This observation does not agree with the results obtained by a similar analysis with relativistic alpha projectile fragments where there was a clear indication of two different temperatures (10 MeV and 40 MeV).

Transverse momentum distribution of partons in QCD

The renormalization group approach is applied to the study of transverse momentum distribution of partons in QCD. We generalize the method of Altarelli and Parisi to obtain a formula for the mean squared average transverse momentum as a function of Q 2 and x, the virtual photon mass squared and the longitudinal momentum fraction of the parton. For large Q 2, it decreases with x in addition to the expected increase with Q 2. This x-dependence reduces substantially the transverse momentum of massive μ-pairs produced by hadronic collisions from its linear dependence on ( Q 2 ln Q 2 ) 1 2 .