Re-Hardening of Hadron Transverse Mass Spectra in Relativistic Heavy-Ion Collisions
نویسندگان
چکیده
We analyze the spectra of pions and protons in heavy-ion collisions at relativistic energies from 2 A GeVto 65+65 A GeVby using a jet-implemented hadron-string cascade model. In this energy region, hadron transverse mass spectra first show softening until SPS energies, and re-hardening may emerge at RHIC energies. Since hadronic matter is expected to show only softening at higher energy densities, this re-hardening of spectra can be interpreted as a good signature of the quark-gluon plasma formation. 25.75.-q, 24.10.-i, 24.85.+p Typeset using REVTEX
منابع مشابه
Transverse Pressure and Strangeness Dynamics in Relativistic Heavy Ion Reactions
Transverse hadron spectra from proton-proton, proton-nucleus and nucleus-nucleus collisions from 2 AGeV to 21.3 ATeV are investigated within two independent transport approaches (HSD and UrQMD). For central Au+Au (Pb+Pb) collisions at energies above Elab ∼ 5 AGeV, the measured K transverse mass spectra have a larger inverse slope parameter than expected from the default calculations. The additi...
متن کاملHeavy Quark Photoproduction in Ultra-peripheral Heavy Ion Collisions
Heavy quarks are copiously produced in ultra-peripheral heavy ion collisions. In the strong electromagnetic fields, cc and bb are produced by photonuclear and two-photon interactions; hadroproduction can occur in grazing interactions. We present the total cross sections, quark transverse momentum and rapidity distributions, as well as the QQ invariant mass spectra from the three production chan...
متن کاملTransverse mass spectra in Heavy Ion Collisions from AGS to RHIC
Transverse mass spectra of hadrons are presently in the center of interest of the experimental study of relativistic heavy ion collisions. The significant suppression of high transverse momentum hadrons in Au+Au collisions compared to pp observed at RHIC energies [1] is often attributed to the energy loss of highly energetic particles in a hot colored medium (QGP) [2]. On the other hand, the me...
متن کاملGeneralized scaling of the transverse mass spectrum at the Relativistic Heavy-Ion Collider
We argue that the transverse mass spectra of identified hadrons as measured in gold-gold collisions at BNL’s Relativistic Heavy-Ion Collider (RHIC) follows a generalized scaling law. Such a scaling behavior is motivated by the idea of a Color Glass Condensate, or more generally, saturation of the gluon density. In particular, we describe the shapes of transverse mass spectra as a function of ce...
متن کاملct 2 00 4 High p T hadron spectra at RHIC : an overview
Abstract. Recent results on high transverse momentum (pT ) hadron production in p+p, d+Au and Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC) are reviewed. Comparison of the nuclear modification factors, RdAu(pT ) and RAA(pT ), demonstrates that the large suppression in central Au+Au collisions is due to strong final-state effects. Theoretical models which incorporate jet quenchi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001