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We discuss forward-bacward rapidity correlations in the general situation of asymmetrical collisions, asymmetric rapidity windows, higher rapidities and higher energy. We give predictions for RHIC and LHC.

High Energy Physics - Phenomenology · Physics 2008-11-26 P. Brogueira , J. Dias de Deus , J. G. Milhano

We calculate production rates for several hard processes in ultraperipheral proton-nucleus and nucleus-nucleus collisions at the LHC. The resulting high rates demonstrate that some key directions in small $x$ research proposed for HERA will…

High Energy Physics - Phenomenology · Physics 2008-11-26 Mark Strikman , Ramona Vogt , Sebastian White

The first measurements of the charged-particle pseudorapidity density, ${\rm d}N_{\rm{ch}}/{\rm d}\eta$, in proton-proton (pp) collisions at $\sqrt{s} =$ 13.6 TeV and in lead-lead (Pb-Pb) collisions at $\sqrt{s_{\rm{NN}}} = $ 5.36 TeV are…

Nuclear Experiment · Physics 2025-06-19 Tulika Tripathy

The observation of an anomalous jpsi suppression in nucleus-nucleus collisions is one of the most important results of the SPS heavy-ion program. An essential ingredient in this result is the determination, obtained by studying p-A…

High Energy Physics - Phenomenology · Physics 2010-04-06 R. Arnaldi , P. Cortese , E. Scomparin

A multi-phase transport (AMPT) model has been successful in explaining a wide range of observables in relativistic heavy ion collisions. In this work, we implement a modern set of free proton parton distribution functions and an impact…

Nuclear Theory · Physics 2019-07-03 Chao Zhang , Liang Zheng , Feng Liu , Shusu Shi , Zi-Wei Lin

The inclusion of running coupling effects in the BK-JIMWLK evolution equations considerably reduces the energy dependence of the saturation scale with respect to previous estimates based on fits to HERA data. We discuss how such slowdown…

High Energy Physics - Phenomenology · Physics 2008-11-26 Javier L. Albacete

Experiments on collisions of light nuclei at $\sqrt{s}=5.36$ TeV have recently begun at the LHC. In this regard we make predictions for nuclear modification factor $R_{AA}$ in 5.36 TeV C+C, O+O, and Ne+Ne collisions for scenarios with and…

High Energy Physics - Phenomenology · Physics 2025-09-10 B. G. Zakharov

The forthcoming LHC measurement of hadron multiplicity in proton-nucleus collisions is a crucial test of the k_t factorization and gluon saturation based models. Here, we provide quantitative predictions for the pseudorapidity distribution…

High Energy Physics - Phenomenology · Physics 2012-01-26 Amir H. Rezaeian

The ATLAS experiment at the LHC has measured the centrality dependence of charged particle pseudorapidity distributions over |eta| < 2 in lead-lead collisions at a nucleon-nucleon centre-of-mass energy of sqrt(s_NN) = 2.76 TeV. In order to…

High Energy Physics - Experiment · Physics 2012-08-27 ATLAS Collaboration

We study the longitudinal polarization of hyperons and anti-hyperons at forward pseudorapidity, $2.5<\eta<4$, in singly polarized $pp$ collisions at RHIC energies by using different parameterizations of the polarized parton densities and…

High Energy Physics - Phenomenology · Physics 2010-04-06 Wei Zhou , Shan-shan Zhou , Qing-hua Xu

Pairing correlations in symmetric nuclear matter are studied within a relativistic mean-field approximation based on a field theory of nucleons coupled to neutral ($\sigma$ and $\omega$) and to charged ($\varrho$) mesons. The Hartree-Fock…

Nuclear Theory · Physics 2016-09-08 F. Matera , G. Fabbri , A. Dellafiore

We present charged particle densities as a function of pseudorapidity and collision centrality for the 197Au+197Au reaction at Sqrt{s_NN}=200 GeV. For the 5% most central events we obtain dN_ch/deta(eta=0) = 625 +/- 55 and N_ch(-4.7<= eta…

Nuclear Experiment · Physics 2011-08-19 BRAHMS Collaboration , I. G. Bearden

This thesis is concerned with the theory and the phenomenology of rapidity gap processes. We perform perturbative calculations of energy flow observables in jet-gap-jet processes, which consist of resummed primary emission calculations…

High Energy Physics - Phenomenology · Physics 2007-05-23 R. B. Appleby

In this article we investigate the influence of nuclear effects in the production of gluinos in nuclear collisions at the LHC, and estimate the transverse momentum dependence of the nuclear ratios $R_{pA} = {\frac{d\sigma (pA)}{dy d^2 p_T}}…

High Energy Physics - Phenomenology · Physics 2011-07-08 C. Brenner Mariotto , D. B. Espindola , M. C. Rodriguez

The pseudorapidity density of charged particles, $\rm{d}\it{N}_\rm{ch}/\rm{d}\it{\eta}$, in p-Pb collisions has been measured at a centre-of-mass energy per nucleon-nucleon pair of $\sqrt{s_{\rm{NN}}}$ = 8.16 TeV at mid-pseudorapidity for…

Nuclear Experiment · Physics 2019-06-17 ALICE Collaboration

We have carried out a wide study of shadowing and antishadowing effects on \jpsi\ production in \dAu\ collisions at $\sqrt{s_{NN}}=200$ GeV. We have studied the effects of three different gluon nPDF sets, using the exact kinematics for a…

High Energy Physics - Phenomenology · Physics 2015-06-03 E. G. Ferreiro , F. Fleuret , J. -P. Lansberg , N. Matagne , A. Rakotozafindrabe

Using a hadron and string cascade model, JPCIAE, the energy and centrality dependences of charged particle pseudorapidity density in relativistic nuclear collisions were studied. Within the framework of this model, both the relativistic…

Nuclear Theory · Physics 2009-11-07 Ben-Hao Sa , A. Bonasera , An Tai , Dai-Mei Zhou

A study of Event by Event analysis of maximum Pseudo-rapidity Gap Fluctuation in heavy-ion collisions in terms of the scaled variance {\omega} has been carried out for relativistic AA collisions with multiplicity cut (N >10) using nuclear…

Nuclear Experiment · Physics 2019-07-24 Swarnapratim Bhattacharyya , Maria Haiduc , Alina Tania Neagu , Elena Firu

Centrality definition in A$+$A collisions at colliders such as RHIC and LHC suffers from a correlated systematic uncertainty caused by the efficiency of detecting a p$+$p collision ($50\pm 5\%$ for PHENIX at RHIC). In A$+$A collisions where…

Nuclear Experiment · Physics 2018-01-19 M. J. Tannenbaum

These proceedings describe the charged-particle pseudorapidity densities and multiplicity distributions measured by the ALICE detector in pp collisions at $\sqrt{s} = 0.9$ and 7 TeV in specific phase space regions. The pseudorapidity range…

High Energy Physics - Experiment · Physics 2019-08-14 Chiara Zampolli