Measurement of neutral mesons in p plus p collisions at root s=200 GeV and scaling properties of hadron production
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
18/04/2012
18/04/2012
2011
|
| Resumo |
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the invariant differential cross section for production of K(S)(0), omega, eta', and phi mesons in p + p collisions at root s 200 GeV. Measurements of omega and phi production in different decay channels give consistent results. New results for the omega are in agreement with previously published data and extend the measured p(T) coverage. The spectral shapes of all hadron transverse momentum distributions measured by PHENIX are well described by a Tsallis distribution functional form with only two parameters, n and T, determining the high-p(T) and characterizing the low-p(T) regions of the spectra, respectively. The values of these parameters are very similar for all analyzed meson spectra, but with a lower parameter T extracted for protons. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions. Office of Nuclear Physics in the Office of Science of the Department of Energy (DOE) National Science Foundation (NSF) Renaissance Technologies LLC Abilene Christian University Research Council Research Foundation of SUNY College of Arts and Sciences, Vanderbilt University (U.S.) Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) and Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) (Brazil) NSFC Natural Science Foundation of China (People's Republic of China) MSMT Ministry of Education, Youth and Sports (Czech Republic) CNRS Centre National de la Recherche Scientifique, CEA Commissariat a l'Energie Atomique (CNRS/IN2P3) Institut National de Physique Nucleaire et de Physique des Particules (France) BMBF - Bundesministerium fur Bildung und Forschung, Germany Alexander von Humboldt Stiftung (Germany) Hungarian National Science Fund, OTKA (Hungary) (DAE) Department of Atomic Energy, India ISF - Israel Science Foundation (Israel) National Research Foundation (NRF), Korea MES Ministry of Education and Science, Russia Academy of Sciences, Federal Agency of Atomic Energy (Russia) Wallenberg Foundation (Sweden) CRDF U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union U.S.-Hungarian Fulbright Foundation for Educational Exchange (BSF) U.S.-Israel Binational Science Foundation JSPS - Japan Society for the Promotion of Science (Japan) |
| Identificador |
PHYSICAL REVIEW D, v.83, n.5, 2011 1550-7998 http://producao.usp.br/handle/BDPI/16057 10.1103/PhysRevD.83.052004 |
| Idioma(s) |
eng |
| Publicador |
AMER PHYSICAL SOC |
| Relação |
Physical Review D |
| Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
| Palavras-Chave | #INTERSECTING STORAGE-RINGS #LARGE TRANSVERSE-MOMENTUM #HEAVY-ION COLLISIONS #INCLUSIVE PRODUCTION #D+AU COLLISIONS #CHARGED PIONS #SPECTRA #DISTRIBUTIONS #DETECTORS #PHYSICS #Astronomy & Astrophysics #Physics, Particles & Fields |
| Tipo |
article original article publishedVersion |