PROTON-NUCLEUS SCATTERING IN A THERMODYNAMICAL FIREBALL MODEL

WU JING-YUAN; XIE YI-CHENG

Chinese Physics C> 1981, Vol. 5> Issue(1) : 29-38

PROTON-NUCLEUS SCATTERING IN A THERMODYNAMICAL FIREBALL MODEL

Abstract
HTML
Reference
Related

PDF

Abstract：
We attempt use a simple fireball model to explain the slow rise of the ratio R_A≡〈N_A〉/〈N_N〉 of the charged multiplicity for proton-nucleus scattering to that for proton-proton scattering verses the apparent nuclear thickness v. The pseudo-rapidity distribution dN_A/d_η is also discussed. In this model, the pi mesons are emitted by fireballs created during nucleon-nucleon scattering. When the incident energy E_lab Z 50 GeV/c², these fire-balls take so long a time to expend to thermal equilibrium that the fireballs have passed through the nucleus completely before pions are emitted. As a result, the charged multiplicity is greatly reduced.This model gives excellent fittings to pp charged mutiplicity, R_A verses v as well as R_emalsion verses E_lab without any free theoretical parameter. By choosing only one parameter for the equilibrium of angular momentum, dN_A/d_η can be fitted satisfactorily except for the large pseudo-rapidity region.

References

[1]

W. Busza, in High Energy Physics and Nuclear B'Eructure, 1975, Proc. of the 6th Inter. Conf Santa Fo and Los Alemns. edited by D. E. Nacle et al..(AIP. New York, 1975) .[2] W. Busza et al.. In Proc. of the XVIII Intor. Conf. on Hing Energy Physics. Tbilisi. 1976 edited by N. N. Bogaliubow et al (JINR, Dnbna, U. S. S. R., 1977).[3] E.Fermi, Prog. Thaor. Phys., 5(1950), 570.[4] E.Feitni. Phys. Rev., 81(1951). 683.[5] T.C. Mangy, Phys. Rev., D9(1974), 3062.[6] M. E. Law et al., Lawroneo Berkeley Laboratory No. LBL-80, 1972 (unpublished).[7] G. Bialkowski, C. B. Chiw and D. M. Tow, Phys. Rev., D17(1978), 862.[8] K. Gott.friod, Phys. Rev. Lett., 32(1974), 957.

[1]	YE Wei . Possible Dependence of Dissipation Strength on Angular Momentum. Chinese Physics C, 2006, 30(8): 759-760.
[2]	LIU Chang-Long , LU Yi-Ying , YIN LI . Effects of Additional Vacancy-Like Defects Produced by Ion Impealations on Boron Thermal Diffusion in Silicon. Chinese Physics C, 2005, 29(11): 1107-1111.
[3]	HU Xi-Duo , SHAO Ming-Zhu , LUO Shi-Yu , LIU Yong-Sheng , ZHU De-Hai . Average Field Idea and Single Particle Model for 2 Dimension Crystallization Beams(Ⅱ). Chinese Physics C, 2004, 28(2): 196-199.
[4]	Medina Ablikim , HUANG Wei-Cheng , . New Realization of N=2 Supersymmetric QuantumMechanics and Shape Invariance. Chinese Physics C, 2002, 26(4): 338-345.
[5]	ZHOU Yong-Zhao , LIANG Hao , XUE Jun-Dong , CHEN Yi-Xin , YANG Tao , GONG Da-Tao , JIN Ge , YU Xiao-Qi . An Online Program for Monitoring KLOE Experiment. Chinese Physics C, 2002, 26(6): 620-625.
[6]	Guo Hua . In-medium QMC Model Parameters and Quark Condensation in Nuclear Matter. Chinese Physics C, 1999, 23(5): 459-468.
[7]	Li Yangguo . Antiproton -Nucleus Charge Exchange Reaction and Inelastic Scattering. Chinese Physics C, 1996, 20(11): 1021-1027.
[8]	ZHU Xiang , SHEN Wen-Qing , HU Xiao-Qing , ZHU Yong-Tai , WANG Bing . A SIMPLE MODEL ANALYSIS OF THE INCOMPLETE DIC REACTION. Chinese Physics C, 1990, 14(9): 835-841.
[9]	WU Zhong-Li . ANALYSIS OF THE MOMENTUM DISTRIBUTION WIDTH OF THE PREOJECTILE-LIKE-FRAGMENT FROM HEAVY ION COLLISIONS. Chinese Physics C, 1989, 13(8): 752-754.
[10]	WANG Man , LI Jin , CUI Xiang-Zong , XIA Xiao-Mi , LAI Yuan-Fen , YAO Xiao-Guang . PROTOTYPE OF END CAP SHOWER COUNTERAND ITS BEAM TEST. Chinese Physics C, 1987, 11(3): 321-326.
[11]	Sa Ben-hao , Zhang Xi-zhen , Li Zhu-xia , Shi Yi-jin . A PRIMARY RESEARCH OF THE PHONON RENORMALIZATION OF NUCLEAR FIELD THEORY. Chinese Physics C, 1980, 4(3): 398-400.
[12]	WU SHI-SHU . ON NUCLEAR SINGLE-PARTICLE POTENTIALS（Ⅲ）SINGLEPARTICLE ENERGIES DETERMINED BY THE NONHERMITIAN POTENTIAL U_αβ=M_αβ（ε_β）. Chinese Physics C, 1979, 3(4): 469-483.

Access

Get Citation

WU JING-YUAN and XIE YI-CHENG. PROTON-NUCLEUS SCATTERING IN A THERMODYNAMICAL FIREBALL MODEL[J]. Chinese Physics C, 1981, 5(1): 29-38.

WU JING-YUAN and XIE YI-CHENG. PROTON-NUCLEUS SCATTERING IN A THERMODYNAMICAL FIREBALL MODEL[J]. Chinese Physics C, 1981, 5(1): 29-38. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1979-08-29
Revised: 1900-01-01

Article Metric

Article Views(2526)
PDF Downloads(250)
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

PROTON-NUCLEUS SCATTERING IN A THERMODYNAMICAL FIREBALL MODEL

WU JING-YUAN
XIE YI-CHENG

Received Date: 1979-08-29
Accepted Date: 1900-01-01
Available Online: 1981-05-05

Abstract: We attempt use a simple fireball model to explain the slow rise of the ratio R_A≡〈N_A〉/〈N_N〉 of the charged multiplicity for proton-nucleus scattering to that for proton-proton scattering verses the apparent nuclear thickness v. The pseudo-rapidity distribution dN_A/d_η is also discussed. In this model, the pi mesons are emitted by fireballs created during nucleon-nucleon scattering. When the incident energy E_lab Z 50 GeV/c², these fire-balls take so long a time to expend to thermal equilibrium that the fireballs have passed through the nucleus completely before pions are emitted. As a result, the charged multiplicity is greatly reduced.This model gives excellent fittings to pp charged mutiplicity, R_A verses v as well as R_emalsion verses E_lab without any free theoretical parameter. By choosing only one parameter for the equilibrium of angular momentum, dN_A/d_η can be fitted satisfactorily except for the large pseudo-rapidity region.