Charged pion, kaon, proton and antiproton production in large collision systems

Abstract The main goal of PHENIX expirement, located at Relativistic Heavy-ion collider, is the investigation of quark-gluon plasma (QGP). One of the aspects of the QGP study is describing the process of its hadronization. Very important contribution to understanding of hadronization process was given by discovering of anomaly large ratio of protons production to pions production (ρ/π) in Au+Au collisions in comparison to the same ratio in proton-proton collisions. This effect was called baryon puzzle and was explained in a frame of recombination model of hadronization. Although charged hadrons production has been previously studied in elementary proton-proton collisions and symmetric Au+Au collisions, it has never been investigated before in the large asymmetric collisions systems (such as Cu+Au) or the collisions of large deformed nuclei (U+U). The study of such large collisions systems allows to study features of baryon and meson production versus collision geometry and system size.

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Freeze-out conditions in proton-proton collisions at the highest energies available at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider

Physical Review C ◽

10.1103/physrevc.95.014912 ◽

2017 ◽

Vol 95 (1) ◽

Cited By ~ 9

Author(s):

Sabita Das ◽

Debadeepti Mishra ◽

Sandeep Chatterjee ◽

Bedangadas Mohanty

Keyword(s):

Large Hadron Collider ◽

Hadron Collider ◽

Heavy Ion ◽

Relativistic Heavy Ion Collider ◽

Proton Proton ◽

Proton Collisions ◽

Cern Large Hadron Collider ◽

Proton Proton Collisions ◽

Freeze Out

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RESULTS FROM PHENIX AT RHIC WITH IMPLICATIONS FOR LHC

International Journal of Modern Physics A ◽

10.1142/s0217751x11054966 ◽

2011 ◽

Vol 26 (32) ◽

pp. 5299-5335 ◽

Cited By ~ 1

Author(s):

M. J. TANNENBAUM

Keyword(s):

Heavy Ion ◽

Jet Quenching ◽

Dense Medium ◽

Particle Multiplicity ◽

Hard Scattering ◽

Relativistic Heavy Ion Collider ◽

Proton Proton ◽

Proton Collisions ◽

Energy Formula ◽

Proton Proton Collisions

Results from the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) in nucleus–nucleus and proton–proton collisions at c.m. energy [Formula: see text] are presented in the context of the methods of single and two-particle inclusive reactions which were used in the discovery of hard-scattering in p–p collisions at the CERN ISR in the 1970's. These techniques are used at RHIC in A + A collisions because of the huge combinatoric background from the large particle multiplicity. Topics include J/Ψ suppression, jet quenching in the dense medium (sQGP) as observed with π0 at large transverse momentum, thermal photons, collective flow, two-particle correlations, suppression of heavy quarks at large pT and its possible relation to Higgs searches at the LHC. The differences and similarities of the measurements in p–p and A + A collisions are presented. The two discussion sessions which followed the lectures on which this article is based are included at the end.

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STUDYING STRANGE MESON PRODUCTION WITH FOPI

International Journal of Modern Physics A ◽

10.1142/s0217751x09043572 ◽

2009 ◽

Vol 24 (02n03) ◽

pp. 271-278 ◽

Cited By ~ 2

Author(s):

OLAF N. HARTMANN

Keyword(s):

Cross Sections ◽

Meson Production ◽

Inclusive Cross Section ◽

Heavy Ion ◽

Proton Proton ◽

Proton Collisions ◽

Strange Meson ◽

Nuclear Clusters ◽

Medium Modification ◽

Proton Proton Collisions

The production of mesons containing strangeness is studied using elementary and heavy-ion probes with the FOPI detector at GSI-SIS. The observed inclusive cross section of neutral kaons points to an in-medium modification in the production. The momentum dependent ratio of cross sections of light and heavy target nuclei turns out to be a sensitive observable for the in-medium potential strength in transport codes. The experiments will continue studying the production of charged kaons with elementary probes including the search for deeply bound antikaon nuclear clusters in proton proton collisions.

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Dielectron Production in Proton–Proton Collisions at √s=7 TeV with ALICE

Proceedings ◽

10.3390/proceedings2019010024 ◽

2019 ◽

Vol 10 (1) ◽

pp. 24

Author(s):

Sebastian Scheid

Keyword(s):

Cross Sections ◽

Mass Range ◽

Heavy Ion ◽

Event Generator ◽

Leading Order ◽

Proton Proton ◽

Total Cross Sections ◽

Proton Collisions ◽

Ion Collisions ◽

Proton Proton Collisions

The ALICE Collaboration measured dielectron production as a function of the invariant mass ( m ee ), the pair transverse momentum ( p T , ee ) and the pair distance of closest approach ( DCA ee ) in pp collisions at s = 7 TeV. Prompt and non-prompt dielectron sources can be separated with the DCA ee , which will give the opportunity in heavy-ion collisions to identify thermal radiation from the medium in the intermediate-mass range dominated by contributions from open-charm and beauty hadron decays. The charm and beauty total cross sections are extracted from the data by fitting the spectra with two different MC generators, i.e., PYTHIA a leading order event generator and POWHEG a next-to-leading order event generator. Significant model dependences are observed, reflecting the sensitivity of this measurement to the heavy-flavour production mechanisms.

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