Rapidity dependence of multiplicity distributions in alpha-emulsion interactions at 12. 4A GeV

Journal Article · Sat Oct 20 04:00:00 EDT 1990 · International Journal of Modern Physics A; (United States)

DOI:https://doi.org/10.1142/S0217751X90001707· OSTI ID:5737516

Aggarwal, M M; Arora, R; Beri, S B; Bhatia, Y S; Kaur, M; Mittra, I S ^[1]; Kumar, V; Palsania, H S; Lal, P; Shukla, V S; Gill, A; Bhalla, K B; Lokanthan, S ^[2]; Badyal, S K; Bhasin, A; Gupta, V K; Kitroo, S; Mangotra, L K; Rao, N K ^[3]; Claesson, G ; Garpman, S; Lund, I; Otterlund, I; Stenlund, E; Soderstrom, K ^[4]

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1. Dept. of Physics, Panab Univ., Chandigarh (IN)
2. Dept. of Physics, Univ. of Rajasthan, Jaipur (IN)
3. Dept. of Physics, Univ. of Jammu, Jammu (IN)
4. Dept. of Physics, Univ. of Lund, S-22362 (SE)

This paper presents results based on an analysis of alpha-emulsion interactions at 12.4A GeV. The multiplicity distributions of shower particles in the restricted rapidity intervals are well described by negative binomially distributions (NBD). The behavior of parameters {bar n} and 1/k of the NBD with increasing {Delta}y in the backward hemisphere is quite different from that found in elementary collisions. Star size dependence is also investigated. An attempt has been made to interpret the results in the framework of a clan model. In the forward hemisphere the average decay multiplicity of clans is small ({bar n}{sub c} = 1.2) and seems to be target-independent, whereas bigger clans are produced in the backward hemisphere and their sizes seem to depend on the target size. Also the average number of clans in the backward hemisphere is less than that in the forward hemisphere and shows target size dependence. Clans seem to be produced independently and their extent in rapidity seems to be target-independent.

• OSTI ID: 5737516
• Journal Information: International Journal of Modern Physics A; (United States), Journal Name: International Journal of Modern Physics A; (United States) Vol. 5:20; ISSN IMPAE; ISSN 0217-751X
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALPHA DECAY
COSMIC RADIATION
COSMIC SHOWERS
DECAY
ENERGY RANGE
GEV RANGE
GEV RANGE 10-100
INTERACTIONS
IONIZING RADIATIONS
MULTIPLICITY
NUCLEAR DECAY
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
RADIATIONS
SECONDARY COSMIC RADIATION
SHOWERS
SIZE
STARS