Unintegrated parton distributions and pion production in pp collisions at RHIC energies

Czech, M.; Szczurek, Antoni

doi:10.1088/0954-3899/32/9/004

Cited by 14 publications

(8 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The collinear parton distribution functions (PDFs) can be generalized to include a transverse momentum degree of freedom, k T , as required by the uncertainty principle. This can be formally implemented in terms of unintegrated PDFs [20,21]. To avoid some of the complications associated with using unintegrated PDFs, it is expedient to parameterize phenomenologically the k T dependence of the parton distributions.…”

Section: A Description Of the Modelmentioning

confidence: 99%

Relativistic light-on-heavy nuclear collisions and the implied rapidity asymmetry

et al. 2009

View full text Add to dashboard Cite

We calculate pseudorapidity (η) asymmetry in pA and dA collisions in a pQCD-improved parton model. With the calculations tuned to describe existing spectra from pp collisions and asymmetric systems at midrapidity and large rapidities at FNAL and RHIC energies, we investigate the roles of nuclear shadowing and multiple scattering on the observed asymmetry. Using this framework, we make predictions for pseudorapidity asymmetries at high pT and large η in a wide range of energies up to LHC. PACS numbers: 24.85.+p,25.30.Dh,

show abstract

Section: A Description Of the Modelmentioning

confidence: 99%

Relativistic light-on-heavy nuclear collisions and the implied rapidity asymmetry

et al. 2009

View full text Add to dashboard Cite

show abstract

“…This fact is well known experimentally [23], but can be also explained by QCD-based calculations [24]. Therefore, also for two colliding P b nuclei (Z = 82, A − Z = 126) some discrepancy between π + and π − distributions is to be considered, and seems indeed indicated by the compilation of numerical results from the NA49 experiment [25].…”

Section: B Isospin Correctionmentioning

confidence: 74%

Spectator induced electromagnetic effects in heavy-ion collisions and space-time-momentum conditions for pion emission

Ozvenchuk,

Rybicki,

Szczurek

et al. 2019

Preprint

View full text Add to dashboard Cite

We present our calculation of electromagnetic effects, induced by the spectator charge on Feynman-xF distributions of charged pions in peripheral P b + P b collisions at CERN SPS energies, including realistic initial space-time-momentum conditions for pion emission. The calculation is performed in the framework of the fire-streak model, adopted to the production of both π − and π + mesons. Isospin effects are included to take into account the asymmetry in production of π + and π − at high rapidity. A comparison to a simplified model from the literature is made. We obtain a good description of the NA49 data on the xF -and pT -dependence of the ratio of cross sections π + /π − . The experimental data favors short times (0.5 < τ < 2 fm/c) for fast pion creation in the local fire-streak rest frame. The possibility of the expansion of the spectators is considered in our calculation, and its influence on the electromagnetic effect observed for the π + /π − ratio is discussed. We conclude that the fire-streak model, which properly describes the centrality dependence of π − rapidity spectra at CERN SPS energies, also provides realistic initial conditions for pion production. Consequently, it provides a quantitative description of the electromagnetic effect on the π + /π − ratio as a function of xF .

show abstract

“…Within the k T -formalism in Ref. [43], the leading-order diagrams involving quark degrees of freedom, which are important in the fragmentation region, were included. Indeed, the contribution at large p Th is sizable at low-energies (intersecting storage rings) and at the Relativistic Heavy Ion Collider kinematic range (for p Th ≳ 3 GeV).…”

Section: Resultsmentioning

confidence: 99%

Investigating the inclusive transverse spectra in high-energy pp collisions in the context of geometric scaling framework

2020

View full text Add to dashboard Cite

The presence of geometric scaling within the p T spectra of produced hadrons at high energy pp collisions using small-x k T-factorization is investigated. It is proposed a phenomenological parameterization for the unintegrated gluon distribution in the scaling range that reproduces the features of the differential cross section both in the saturated and dilute perturbative QCD regimes. As the saturation scale acts as an effective regulator of the infrared region, the extension of the model to quantities usually associated to soft physics is studied. The approach is applied to compute the average p T and the rapidity distribution of produced gluons at high energies.

show abstract

Unintegrated parton distributions and pion production in pp collisions at RHIC energies

Cited by 14 publications

References 38 publications

Relativistic light-on-heavy nuclear collisions and the implied rapidity asymmetry

Relativistic light-on-heavy nuclear collisions and the implied rapidity asymmetry

Spectator induced electromagnetic effects in heavy-ion collisions and space-time-momentum conditions for pion emission

Investigating the inclusive transverse spectra in high-energy pp collisions in the context of geometric scaling framework

Contact Info

Product

Resources

About