Pion and proton "temperatures" in relativistic heavy-ion reactions
Pion and proton production are measured to investigate thermal equilibrium in central collisions of 40Ar+KCl at 1.8 GeV/nucleon. The bulk of the pion yield is isotropic in the c.m. system, with an apparent temperature of
Pion and proton production are measured to investigate thermal equilibrium in central collisions of 40Ar+KCl at 1.8 GeV/nucleon. The bulk of the pion yield is isotropic in the c.m. system, with an apparent temperature of 58±3 MeV, much lower than the 118±2 MeV of the protons. It is shown that the low pion "temperature" can be explained by the decay kinematics of delta resonances in thermal equilibrium. A (5±1)% component in the pion spectrum is, however, found to have a temperature of 110±10 MeV. The effect on the spectra of possible contributions from collective radial flow is discussed.…


Author: | Robert Brockmann, John W. Harris, Andres Sandoval, Reinhard Stock, Herbert Ströbele, Grazyna Odyniec, Howel G. Pugh, Lee S. Schroeder, Rainer Ernst Arno Renfordt, Dietmar Schall, Dieter Bangert, Wolfgang Rauch, Kevin L. Wolf |
---|---|
URN: | urn:nbn:de:hebis:30-17500 |
URL: | http://link.aps.org/abstract/PRL/v53/p2012 |
Parent Title (German): | Physical review letter |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2005/10/05 |
Year of first Publication: | 1984 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2005/10/05 |
Volume: | 53 |
Issue: | 21 |
Pagenumber: | 4 |
First Page: | 2012 |
Last Page: | 2015 |
Source: | Phys. Rev. Lett. 53, 2012-2015, ©1983 The American Physical Society, http://link.aps.org/abstract/PRL/v53/p2012 |
HeBIS PPN: | 186959982 |
Institutes: | Physik |
Dewey Decimal Classification: | 530 Physik |
Licence (German): | ![]() |