Multiplicity dependence of inclusive p(t) spectra from p-p collisions at root s=200 GeV

作者：Adams J^*; Aggarwal M M; Ahammed Z; Amonett J; Anderson B D; Anderson M; Arkhipkin D; Averichev G S; Bai Y; Balewski J; Barannikova O; Barnby L S; Baudot J; Bekele S; Belaga V V; Bellingeri Laurikainen A; Bellwied R; Benedosso F; Bezverkhny B I; Bhardwaj S; Bhasin A; Bhati A K; Bichsel H; Bielcik J; Bielcikova J; Bland L C; Blyth C O; Blyth S L; Bonner B E; Botje M; Bouchet J; Brandin A V; Bravar A; Bystersky M

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2006, 74(3): 032006.

DOI：10.1103/PhysRevD.74.032006

We report measurements of transverse momentum p(t) spectra for ten event multiplicity classes of p-p collisions at root s=200 GeV. By analyzing the multiplicity dependence we find that the spectrum shape can be decomposed into a part with amplitude proportional to multiplicity and described by a Levy distribution on transverse mass m(t), and a part with amplitude proportional to multiplicity squared and described by a Gaussian distribution on transverse rapidity y(t). The functional forms of the two parts are nearly independent of event multiplicity. The two parts can be identified with the soft and hard components of a two-component model of p-p collisions. This analysis then provides the first isolation of the hard component of the p(t) spectrum as a distribution of simple form on y(t).

• 出版日期2006-8
• 单位中国科学技术大学; 清华大学; 华中师范大学; 中国科学院上海应用物理研究所