Simulation Study on the Splitting Effect of Transverse Mass Spectra in p+p Collisions at √S=200GeV Using PYTHIA

XU Yi-Chun; SHAO Ming; ZHANG Zi-Ping

Chinese Physics C> 2007, Vol. 31> Issue(6) : 538-542

Simulation Study on the Splitting Effect of Transverse Mass Spectra in p+p Collisions at √S=200GeV Using PYTHIA

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Abstract
HTML
Reference
Related

PDF

Abstract：
In proton-proton (p+p) collisions at √S=200GeV, it is found that the previously observed universal shape of transverse mass spectra of hadron production seems to break down into two species of baryons and mesons at higher transverse mass region. In order to understand the underlying physics mechanism, a Monte Carlo study is done using the PYTHIA event generator. The simulation results demonstrate that this difference exists not only within string fragmentation scheme but also within independent fragmentation scheme, and comes primarily from gluon jets within string fragmentation scheme at RHIC energy. The new introduced physics mechanisms in PYTHIA version6.3 indicate that the complicated string junction may contribute to this splitting effect between mesons and baryons.

References

[1]

. Heinz M. Nucl. Part. Phys., 2005, 31: S141|S1462. Alper B et al. Nucl. Phys., 1975, B100: 2373. Alper B et al. Nucl. Phys., 1975, B87: 194. Sjostrand T et al. hep-ph/03081535. Sjostrand T et al. hep-ph/01082646. Adams J et al(STAR Collaboration). Phys. Rev. Lett.,2004, 92: 1123017. Adams J et al(STAR Collaboration). Phys. Lett., 2005,B616: 88. Adler C et al(PHENIX Collaboration). Phys. Rev. Lett.,2003, 91: 2418039. Sjostrand T, Skands P Z. hep-ph/040830210. Sjostrand T, Skands P Z. hep-ph/0402078

[1]	LIU Fu-Ming , Tetsufumi Hirano , Klaus Werner , ZHU Yan . Elliptic flow of direct photons in Au+Au collisions at 200 GeV. Chinese Physics C, 2010, 34(9): 1433-1435. doi: 10.1088/1674-1137/34/9/063
[2]	WANG Yun-Fei , SHAO Feng-Lan , SONG Jun , WEI De-Ming , XIE Qu-Bing . Centrality dependence of p_T spectra for identified hadrons in Au+Au and Cu+Cu collisions at √s_NN= 200GeV. Chinese Physics C, 2008, 32(12): 976-983. doi: 10.1088/1674-1137/32/12/007
[3]	DONG Ya-Fei , JIANG Zhi-Jin , WANG Zeng-Wei . Pseudorapidity distribution of multiplicity in Au+Au collisions at √s_NN=200GeV. Chinese Physics C, 2008, 32(4): 259-263. doi: 10.1088/1674-1137/32/4/004
[4]	ZUO Jia-Xu , SORENSEN Paul , CAI Xiang-Zhou , HEINZ Mark , MA Yu-Gang . Particle correlation in p+p collision √s_NN=200 GeV in PYTHIA. Chinese Physics C, 2008, 32(S2): 13-16.
[5]	TANG Ze-Bo . Spin Alignment of Vector Mesons K^*0(892) and φ(1020) in Au+Au and p+p Collsions at s_NN=200GeV. Chinese Physics C, 2007, 31(12): 1192-1195.
[6]	Kentaro Miki . Elliptic Flow Measurement of Direct Photon in s_NN=200GeV Au+Au Collisions at RHIC-PHENIX. Chinese Physics C, 2007, 31(12): 1174-1176.
[7]	S.J.Sanders . Differential Elliptic Flow at Forward Rapidity in 200GeV AuAu Collisions. Chinese Physics C, 2007, 31(12): 1137-1140.
[8]	HAN Ran . Polarization of Anti-Lambda in s=200GeV Polarized Proton-Proton Collision. Chinese Physics C, 2007, 31(12): 1189-1191.
[9]	SHAN Qing , WU Jian , WANG Xiao-Lian , CHEN Hong-Fang , ZHANG Yi-Fei , ZHANG Zi-Ping , SHAO Ming . Upper Limit of the Yield of Di-Omega in Central Au-Au Collision at Snn=200GeV with HIJING. Chinese Physics C, 2005, 29(12): 1146-1149.
[10]	CHI Shao-Peng , MO Xiao-Hu , ZHU Yong-Sheng . Measurement of the Integrated Luminosity at s(1/2)=3.650,3.686 GeV for the BES Detector. Chinese Physics C, 2004, 28(11): 1135-1140.
[11]	TIAN Hui-Xian , JIN Yun-Fan , ZHU Zhi-Yong , LIU Chang-Long , SUN You-Mei , WANG Zhi-Guang , LIU Jie , CHEN Xiao-Xi , WANG Yan-Bin , HOU Ming-Dong . Irradiation Effects in Polycarbonate Induced by 2.1GeV Kr Ions. Chinese Physics C, 2002, 26(4): 435-440.
[12]	QI XiangRong , HU HaiMing , LI XinHua , HUANG GuangShun , CHEN JiangChuan , HU Tao , JU Xin , LI Jin , MAO ZePu , XUE ShengTian , ZHENG ZhiPeng , ZHOU Li , ZHAO ZhengGuo . R Measurement around s=3.55GeV. Chinese Physics C, 2000, 24(7): 609-615.
[13]	WANG Hui , SA BenHao , TAI An . Low PT Enhancement of Photon Production in 200 A GeV S+ An Collisions. Chinese Physics C, 2000, 24(3): 220-224.
[14]	Li Panlin , Deng Chengfeng , Wang Lilian , Xu Mengjie . Calculation of the Productive Dilepton Spectrum (M≤4GeV/c²) in ²³⁸U+²³⁸U Collisions at E_c,m≈200GeV/u. Chinese Physics C, 1999, 23(7): 693-700.
[15]	Sa Benhao , Tai An . Reduction of Strangeness Suppression and Strange Antibaryon Production in Sulphur-Nucleus Collisions at 200A GeV. Chinese Physics C, 1998, 22(1): 41-47.
[16]	BES collaboration . Study of the Decay τ±→π+π-π±υτ at s=4.03 GeV. Chinese Physics C, 1995, 19(5): 385-392.
[17]	JING Guiru , REN Guoxiao . Angular Distributions of Projectile Fragments Produced in Collisions of 200A GeV ³²S Beam with Cu. Chinese Physics C, 1993, 17(11): 976-978.
[18]	REN Guo-Xiao . Measurement of Charge Changing Cross Sections of 200A GeV S and Fragments with Cu Target. Chinese Physics C, 1991, 15(12): 1063-1068.
[19]	Ren Guoxiao . Measurement of Charge-Changing Cross Sections of 200 A GeV S and Fragments with Cu Target. Chinese Physics C, 1991, 15(S4): 323-329.
[20]	LIU Bo , WANG Ying-Cai . MULTIPLICITY DISTRIBUTIONS OF PRODUCED PARTICLES AND ENERGY LOSS IN PROTON-NUCLEUS COLLISIONS AT 200GeV/c. Chinese Physics C, 1987, 11(2): 231-237.

Access

Get Citation

XU Yi-Chun, SHAO Ming and ZHANG Zi-Ping. Simulation Study on the Splitting Effect of Transverse Mass Spectra in p+p Collisions at √S=200GeV Using PYTHIA[J]. Chinese Physics C, 2007, 31(6): 538-542.

XU Yi-Chun, SHAO Ming and ZHANG Zi-Ping. Simulation Study on the Splitting Effect of Transverse Mass Spectra in p+p Collisions at √S=200GeV Using PYTHIA[J]. Chinese Physics C, 2007, 31(6): 538-542. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2006-09-27
Revised: 2006-11-30

Article Metric

Article Views(4242)
PDF Downloads(699)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Simulation Study on the Splitting Effect of Transverse Mass Spectra in p+p Collisions at √S=200GeV Using PYTHIA

Corresponding author: XU Yi-Chun,

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Received Date: 2006-09-27
Accepted Date: 2006-11-30
Available Online: 2007-06-05

Abstract: In proton-proton (p+p) collisions at √S=200GeV, it is found that the previously observed universal shape of transverse mass spectra of hadron production seems to break down into two species of baryons and mesons at higher transverse mass region. In order to understand the underlying physics mechanism, a Monte Carlo study is done using the PYTHIA event generator. The simulation results demonstrate that this difference exists not only within string fragmentation scheme but also within independent fragmentation scheme, and comes primarily from gluon jets within string fragmentation scheme at RHIC energy. The new introduced physics mechanisms in PYTHIA version6.3 indicate that the complicated string junction may contribute to this splitting effect between mesons and baryons.