Chinese Physics C > 1997, Vol. 21 > Issue(4): 330-339

Comparison of the Hard and Soft Processes in High Energy Hadron-Hadron Colisions

Liu Feng(Y)^,,
Liu Feng

Institute of Particle Physics,Huazhong Normal University,Wuhan 430070

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Abstract：
Using the“con ealgorithm”in QCD to identify jet,the hard and soft processes in high energy hadroncic olisions are analysed indetail.A Monte Carlo simulation event sample is produced by PYTHIA.The resultant pseudorapidity distribution of jets has a plateau in the central region.The particle and transverse energy density in jets decreases exponentially with the increase of the distance from particles to jet axis.Through comparisons,we find the event average transverse momentum or maximum transverse momentum is positively correlated with multiplicity for the whole event sample,and negatively correlated with multiplicity for jet event subsample.Two ratio variables well describe the hardness of jet events,and they are positively correlated with the event average transverse momentum and negatively correlated with multiplicity,which confirms the event average transverse momentum is a better characteristic quantity to describe the hardness of jet events than multiplicity.

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[1]

S.D.Elis,Z.Kunszt,D.E.Soper,Phys.Rev.,D40（1989）2188[2]G.Hanson et al.,Phys.Rev.Lett.,35（1975）1609[3]W.Bartel et al.（JADE）,Z.Phys.,C33（1986）23;S.Catani et al.,Phys.Lett.,B269（1991）432.[4]刘明、柳峰、刘峰等，高能物理与核物理，21（1997）138.[5]H.-U.Bengtsson,T.Sjostrand,Comput.Phys,Commun.,46（1987）43.[6]Wu Yuanfang,Liu Lianshou,Phys.Lett.,B269（1991）28.[7]Liu Feng,Wu Yuanfang,Liu Lianshou,Chinese J.Nucl.Phys.,15（1993）7.[8]Y.F.Wu et al.（UA1）,Acta Physica Slovaca,44（1994）141.[9]Liu Hongping,Liu Fengt,Wu Yuanfang et al.,Ont the Experimental Evidence for the Appearance of Semihard Processes in Hadron-Hadron Colisions at Collider Energies,预印本HZPP9604.[10]V.V.Aivazan et al.（NA22）,Phys.Lett.,B209（1988）103.[11]兰其开、刘连寿，高能物理与核物理，17（1993）934.[12]X.N.Wang.R.C.Hwa,Phys.Rev,D39（1989）187.[13]刘明、刘峰、刘连寿，高能碰撞多粒子末态硬软程度的量度，华中师范大学学报（自然科学版）,待发表

[1]	SHI Shu-Su,LIU Lian-Shou. A Monte Carlo Study on the Expansion of Hadronic Gas in Relativistic Heavy Ion Collisions. Chinese Physics C, 2007, 31(1): 56-58.
[2]	WANG Mei-Juan,WU Yuan-Fang. Correlation Patterns in Hadron-hadron Collisions. Chinese Physics C, 2006, 30(7): 652-654.
[3]	YIN Jian-Wu,LIU Feng,LIU Lian-Shou. Self-Affine Analysis for the Dynamical Fluctuations inside Jets Produced in High Energy Hadron-Hadron Collisions. Chinese Physics C, 2002, 26(2): 152-157.
[4]	YIN Jian-Wu,LIU Feng. On the Dynamical Fluctuations in the Production and Evolusion of Jets in High Energy Hadron-Hadron Collisions. Chinese Physics C, 2002, 26(5): 477-483.
[5]	GUO Yuan-Yuan,ZENG Jie,YIN Jian-Wu. Monte Carlo Study of the Dynamical Fluctuation Properties inside Jets in High Energy Hadron-Hadron Collisions. Chinese Physics C, 2001, 25(11): 1084-1088.
[6]	LIU Chun-Xiu,LIANG Zuo-Tang. Spin Transfer in High-Energy Hadronization Processes and Polarization of Hyperon in the Lepton-Induced Reactions. Chinese Physics C, 2001, 25(6): 476-486.
[7]	LV Yan,YANG Li-Jian,YANG Li-Ping,MAO Tian. Monte Carlo Study of the Properties of Jets in High Energy Hadron-Hadron Collisions. Chinese Physics C, 2001, 25(11): 1077-1083.
[8]	Yu Hong,Shen Qixing. Multi-channel Coupling in the Hadronic Decay Process J/ψ→ωπ⁺π^－. Chinese Physics C, 1997, 21(2): 123-129.
[9]	Liu Hongping,Liu Feng,Wu Yuanfang,Liu Lianshou. An Experimental Evidence for the Appearance of Semihard Processes in Hadron-Hadron Collisions at Collider Energies. Chinese Physics C, 1997, 21(7): 609-614.
[10]	Ren Jingru,Lu Suiling,Wang Chengrui,He Mao,Zhang Naijian,Cao Peiyuan,Li Jinyu,Wang Sh,Wang izhi,Wang Mingxing. Attenuation of High Energy Hadrons in Iron. Chinese Physics C, 1996, 20(5): 405-408.
[11]	Cao Zhen,Ding Linkai. Chou-Yang Model for the Description of Ultrahigh Energy Soft Hadronic Interactions. Chinese Physics C, 1994, 18(11): 990-995.
[12]	WU Yuan-Fang,LIU Lian-Shou. On the Moment-Order,Multiplicity and Transverse-Momentum Dependences of Intermittency in Hadron-Hadron Collisions. Chinese Physics C, 1991, 15(9): 822-826.
[13]	YU Hong,SHEN Qi-Xing. THE MOMENT ANALYSIS FOR THE J/ψ HADRONIC DECAY PROCESS. Chinese Physics C, 1990, 14(10): 875-881.
[14]	ZHOU Jing-Chen,CAI Xu. BREAK DOWN OF UNIVERSALITY OF KNO SCALED MULTIPLICITY DISTRIBUTIONS IN HIGH ENERGY HADRON-NUCLEUS COLLISIONS AND MULTISOURCE MODEL. Chinese Physics C, 1989, 13(10): 896-899.
[15]	WU Yuan-Fang,LIU Lian-Shou. INVESTIGATION OF THE HIGH ENERGY LIMIT IN HADRON-HADRON COLLISION USING MEM. Chinese Physics C, 1989, 13(9): 808-813.
[16]	XIE Qu-Bing,LIU Xi-Ming. THE RATIO OF BARYON TO MESON MESON IN HIGH ENERGY HADRONIC REACTION. Chinese Physics C, 1987, 11(2): 192-197.
[17]	DONG Bao-Zhong. ANALYSIS OF HADRONIC EVENTS. Chinese Physics C, 1987, 11(5): 596-602.
[18]	PENG Tie-Liang,LI Zi-Bang,PENG Hong-An. THE INFLUENCE OF EMC EFFECT ON LEPTON PAIR PRODUCTION OF HIGH ENERGY HADRON-NUCLEI COLLISION. Chinese Physics C, 1986, 10(4): 438-445.
[19]	LI Bing-An,SHEN Qi-Xing,YU Hong. ELECTROWEAK INTERFERENCE EFFECTS IN THE HIGH ENERGY e⁺+e^－→e⁺+e^－+ HADRONS PROCESSES. Chinese Physics C, 1984, 8(1): 39-44.
[20]	XIE Qu-Bing. THE COLLIDING COMPONENT IN SOFT HADRONIC INTERACTIONS. Chinese Physics C, 1984, 8(3): 306-315.

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Liu Feng(Y) and Liu Feng. Comparison of the Hard and Soft Processes in High Energy Hadron-Hadron Colisions[J]. Chinese Physics C, 1997, 21(4): 330-339.

Liu Feng(Y) and Liu Feng. Comparison of the Hard and Soft Processes in High Energy Hadron-Hadron Colisions[J]. Chinese Physics C, 1997, 21(4): 330-339. shu

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Received: 1900-01-01
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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Comparison of the Hard and Soft Processes in High Energy Hadron-Hadron Colisions

Corresponding author:Liu Feng(Y),

Institute of Particle Physics,Huazhong Normal University,Wuhan 430070

Received Date:1900-01-01

Accepted Date:1900-01-01

Available Online:1997-04-05

Abstract:Using the“con ealgorithm”in QCD to identify jet,the hard and soft processes in high energy hadroncic olisions are analysed indetail.A Monte Carlo simulation event sample is produced by PYTHIA.The resultant pseudorapidity distribution of jets has a plateau in the central region.The particle and transverse energy density in jets decreases exponentially with the increase of the distance from particles to jet axis.Through comparisons,we find the event average transverse momentum or maximum transverse momentum is positively correlated with multiplicity for the whole event sample,and negatively correlated with multiplicity for jet event subsample.Two ratio variables well describe the hardness of jet events,and they are positively correlated with the event average transverse momentum and negatively correlated with multiplicity,which confirms the event average transverse momentum is a better characteristic quantity to describe the hardness of jet events than multiplicity.

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Comparison of the Hard and Soft Processes in High Energy Hadron-Hadron Colisions

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