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High $p_{\rm T}$ hadrons in the small systems of $d/^3$He+Au and $p$+Al/Au collisions have been measured at the midrapidity ($|\eta|<0.35$) as well as at the forward and backward rapidities ($1.2<|\eta|<2.4$) at $\sqrt{s_{NN}}$=200GeV. A…

Nuclear Experiment · Physics 2019-08-13 Takao Sakaguchi

We calculate nuclear suppression factor ($R_{AA}$) for light hadrons by taking only the elastic processes and argue that in the measured $p_T$ domain of RHIC, collisional rather than the radiative processes is the dominant mechanism for…

Nuclear Theory · Physics 2008-11-26 Jan-e Alam , Abhee K. Dutt-Mazumder , Pradip Roy

We study a strong suppression of the relative production rate (d-Au)/(p-p) for inclusive high-pT hadrons of different species at large forward rapidities (large Feynman xF). The model predictions calculated in the light-cone dipole approach…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. Nemchik , V. Petracek , I. K. Potashnikova , M. Sumbera

Three measurements that broaden the scope of the experimental investigation of quarkonia modifications in heavy ion collisions are presented. Although the current statistical precision on the first two measurements does not allow one to…

Nuclear Experiment · Physics 2019-08-13 Ermias T. Atomssa

Nuclear modification factors for pion production in AuAu and CuCu collisions are analyzed at very high transverse momenta. At p_T > 10 GeV/c, the R_{AA}(p_T) is determined mostly by the initial state nuclear modifications (e.g. EMC effect)…

High Energy Physics - Phenomenology · Physics 2009-05-07 G. G. Barnafoldi , G. Fai , P. Levai , G. Papp , B. A. Cole

Collinear factorized perturbative QCD model predictions are compared for p+Pb at 4.4A TeV to test nuclear shadowing of parton distribution at the Large Hadron Collider (LHC). The nuclear modification factor (NMF), R_{pPb}(y=0,p_T<20 GeV/c)…

Nuclear Theory · Physics 2015-03-19 G. G. Barnafoldi , J. Barrette , M. Gyulassy , P. Levai , V. Topor Pop

Recent RHIC results on pion production in AuAu collision at sqrt(s)=130 and 200 AGeV display a strong suppression effect at high p_T. This suppression can be connected to final state effects, namely jet energy loss induced by the produced…

High Energy Physics - Phenomenology · Physics 2009-10-09 G. G. Barnafoldi , P. Levai , G. Papp , G. Fai , M. Gyulassy

RHIC data on high-$p_T$ hadron production display strong suppression in a wide rapidity region, indicating strong induced energy loss for both transversally and longitudinally traveling partons. We investigate the interplay of energy loss…

High Energy Physics - Phenomenology · Physics 2009-11-11 G. G. Barnafoldi , P. Levai , G. Papp , G. Fai

In this paper, our goal is to make a simultaneous analysis of the high- and low-P_T parts of the charged-hadron P_T spectrum measured by the ALICE collaboration in central Pb-Pb collisions at sqrt{s}=2.76 TeV at the Large Hadron Collider…

High Energy Physics - Phenomenology · Physics 2011-08-22 Thorsten Renk , Hannu Holopainen , Risto Paatelainen , Kari J. Eskola

The effects of parton energy loss and pT-broadening in cold nuclear matter on the pT and centrality dependence, at various rapidities, of J/psi suppression in p-A collisions are investigated. Calculations are systematically compared to E866…

High Energy Physics - Phenomenology · Physics 2015-06-15 François Arleo , Rodion Kolevatov , Stéphane Peigné , Maryam Rustamova

Transverse momentum spectra of neutral pions in the range 1 < p_T < 10 GeV/c have been measured at mid-rapidity by the PHENIX experiment at RHIC in Au+Au collisions at sqrt(s_NN) = 200 GeV. The pi^0 multiplicity in central reactions is…

Nuclear Experiment · Physics 2008-11-26 PHENIX Collaboration , S. S. Adler

Transverse momentum spectra of charged hadrons with ${p_{T} <}$ 6 GeV/c have been measured near mid-rapidity (0.2 $< \eta <$ 1.4) by the PHOBOS experiment at RHIC in Au + Au and d + Au collisions at ${\sqrt{s_{_{NN}}} = \rm {200 GeV}}$. The…

Nuclear Experiment · Physics 2008-11-26 Rachid Nouicer

Herewith we present the production of identified hadrons in Au+Au and p+p collisions at $\sqrt{s_{NN}}=200 {\rm GeV}$ at forward rapidity, $y \approx 3.2$. Suppression of pions and kaons and enhancement for protons in central Au+Au…

Nuclear Experiment · Physics 2007-05-23 Radoslaw Karabowicz

PHENIX reports on electromagnetic and hadronic observables in large data sets of p+p, d+Au and Au+Au collisions at various cms energies. Initial state effects in cold nuclear matter are quantified by centrality dependent $\pi^0$, $\eta$,…

Nuclear Experiment · Physics 2019-08-13 Takao Sakaguchi

As a colorless probe, direct photons balance the $p_T$ of the away-side jet at leading order. Direct photon-hadron correlations are thus an excellent probe for nuclear structure and QCD effects, including parton energy loss in the…

High Energy Physics - Experiment · Physics 2019-08-13 J. D. Osborn

Au+Au, $\sqrt{s} = 200$ A GeV measurements at RHIC, obtained with the PHENIX, STAR, PHOBOS and BRAHMS detectors, have all indicated a suppression of production, relative to an appropriately normalized NN level. For central collisions and…

Nuclear Theory · Physics 2007-05-23 D. E. Kahana , S. H. Kahana

We compute for the first time the suppression of bottomonia in a strongly coupled QGP and compare the results to those from a weakly coupled QGP. Using imaginary time techniques we numerically determine the real and imaginary parts of the…

High Energy Physics - Phenomenology · Physics 2020-01-29 N. N. Barnard , W. A. Horowitz

We provide predictions for the nuclear modification factor R_{pA} for pions and direct photon production in p+A collisions at LHC energy at midrapidity within different saturation models fitted to HERA data. In our approach we have no free…

High Energy Physics - Phenomenology · Physics 2014-11-20 Amir H. Rezaeian

A parameter-free calculation for J/Psi suppression in pA collisions, based on the dipole description, is confronted with the new data from the PHENIX experiment. Achieving good agreement, we employed this model predicting the contribution…

High Energy Physics - Phenomenology · Physics 2011-08-19 B. Z. Kopeliovich , I. K. Potashnikov , Ivan Schmidt

Data on hadron production at high transverse momentum ($p_T>$ 2 GeV/$c$) in p+p, d+Au, and Au+Au collisions at $\sqrt{s_{NN}$ = 200 GeV from the PHENIX experiment at RHIC are reviewed. The single inclusive spectrum of light hadrons produced…

Nuclear Experiment · Physics 2007-05-23 David d'Enterria
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