Abstract
We analyze the spectra of pions and protons in heavy-ion collisions at relativistic energies from 2 A GeV to 65+65 A GeV by 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
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References
Quark Matter ’97,Proc. 13th Int. Conf. on Ultra-Relativistic Nucleus-Nucleus Collisions, Tsukuba, Japan, 1997, edited by T Hatsuda, Y Miake, S Nagamiya and K Yagi,Nucl. Phys. A638, 3c (1998)
Quark Matter ’99,Proc. 14th Int. Conf. on Ultra-Relativistic Nucleus-Nucleus Collisions, Torino, Italy, 1999, edited by L Riccati, M Masera and E Vercellin,Nucl. Phys. A661, 3c (1999)
T Matsui and H Satz,Phys. Lett. B178, 416 (1986)
J Rafelski,Phys. Lett. B262, 333 (1991)
G Q Li, C M Ko and G E Brown,Phys. Rev. Lett. 75, 4007 (1995)
FOPI Collaboration: N Herrmannet al, Nucl. Phys. A610, 49c (1996)
P K Sahu, W Cassing, U Mosel and A Ohnishi,Nucl. Phys. A672, 376 (2000)
R Hagedorn,Nuovo Cimento Suppl. 3, 147 (1965)
H Sorge, H Stöcker and W Greiner,Ann. Phys. (N. Y.) 192, 266 (1989)
W Cassing and U Mosel,Prog. Part. Nucl. Phys. 25, 235 (1990)
N S Amelin, K K Gudima and V D Toneev,Yad. Fiz. 51, 512 (1990),Sov. J. Nucl. Phys. 51, 327 (1990)
S A Bass, M Belkacem, M Bleicher, M Brandstetter, L Bravina, C Ernst, L Gerland, M Hofmann, S Hofmann, J Konopka, G Mao, L Neise, S Soff, C Spieles, H Weber, L A Winckelmann, H Stöcker, W Greiner, C Hartnack, J Aichelin and N Amelin,Prog. Part. Nucl. Phys. 41, 225 (1998)
Y Nara, N Otuka, A Ohnishi, K Niita and S Chiba,Phys. Rev. C61, 024901 (2000)
Y Pang, T J Schlagel and S H Kahana,Phys. Rev. Lett. 68, 2743 (1992)
B A Li and C M Ko,Phys. Rev. C52, 2037 (1995)
N Otuka,Hadronic degrees of freedom in relativistic heavy-ion collisions, Thesis, Hokkaido University, March, 2001
H Ohnishi for the PHENIX Collaboration: Oral presentation at the meeting of Physical Society of Japan, Niigata, Japan, September, 2000
N Xu, Invited talk at the15th Int. Conf. on Ultra-Relativistic Nucleus-Nucleus Collisions, Stony Brook, USA, January, 2001
JACEE Collaboration: Y Takahashiet al, Nucl. Phys. A461, 263c (1987)
S A Bass and A Dumitru,Phys. Rev. C61, 064909 (2000)
T Sjöstrand,Comput. Phys. Commun. 82, 74 (1994)
Y Nara,Nucl. Phys. A638, 555c (1998)
X N Wang and M Gyulassy,Comput. Phys. Commun. 83, 307 (1994)
X N Wang,Phys. Rep. 280, 287 (1997)
We have adopted the source code of JAM, which was written before the RHIC experiments started, to avoid any fitting to the data
PHENIX Collaboration: K Adcoxet al, LANL Report No. nucl-ex/0012008
F Videvœk for the BRAHMS Collaboration: Oral presentation at the15th Int. Conf. Ultra-Relativistic Nucleus—Nucleus Collisions, Stony Brook, USA, January, 2001
PHOBOS Collaboration: B B Backet al, Phys. Rev. Lett. 85, 3100 (2000)
E802 Collaboration: L Ahleet al, Phys. Rev. C57, R466 (1998)
NA49 Collaboration: Appelshäueseret al, Phys. Rev. Lett. 82, 2471 (1999)
Quark Matter 2001,Proc. 15th Int. Conf. on Ultra-Relativistic Nucleus-Nucleus Collisions, Stony Brook, USA, January, 2001,Nucl. Phys. A698, 3 (2002)
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Sahu, P.K., Otuka, N., Isse, M. et al. Re-hardening of hadron transverse mass spectra in relativistic heavy-ion collisions. Pramana - J Phys 66, 809–816 (2006). https://doi.org/10.1007/BF02704779
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DOI: https://doi.org/10.1007/BF02704779