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Title: Rapidity and species dependence of particle production at largetransverse momentum for d+Au collisions at psNN = 200 GeV

Abstract

We determine rapidity asymmetry in the production of charged pions, protons and anti-protons for large transverse momentum (p{sub T}) for d+Au collisions at {radical}s{sub NN} = 200 GeV. The rapidity asymmetry is defined as the ratio of particle yields at backward rapidity (Au beam direction or -ve rapidity) to those at forward rapidity (d beam direction or +ve rapidity). The identified hadrons are measured in the rapidity regions |y| < 0.5 and 0.5 < |y| < 1.0 for the p{sub T} range 2.5 < p{sub T} < 10 GeV/c. We observe significant rapidity asymmetry for charged pion and proton+anti-proton production in both rapidity regions. The asymmetry is larger for 0.5 < |y| < 1.0 than for |y| < 0.5 and is almost independent of particle type. The measurements are compared to various model predictions employing multiple scattering, energy loss, nuclear shadowing, saturation effects, and recombination, and also to a phenomenological parton model. We find that asymmetries are sensitive to model parameters and show model-preference. The rapidity dependence of {pi}{sup -}/{pi}{sup +} and {bar p}/p ratios in peripheral d+Au and forward neutron-tagged events are used to study the contributions of valence quarks and gluons to particle production at high p{sub T}.more » The results are compared to calculations based on NLO pQCD and other measurements of quark fragmentation functions.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
COLLABORATION - STAR
OSTI Identifier:
902461
Report Number(s):
LBNL-62243
R&D Project: NRNC; BnR: KB0201022; TRN: US0702939
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
73; ASYMMETRY; FRAGMENTATION; GLUONS; HADRONS; MULTIPLE SCATTERING; PARTICLE PRODUCTION; PARTICLE RAPIDITY; PIONS; PRODUCTION; PROTONS; QUARKS; RECOMBINATION; SATURATION; TRANSVERSE MOMENTUM; VALENCE

Citation Formats

Abelev, B.I., 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., Bhardwaj, S., Bhasin, A., Bhati, A.K., Bichsel, H., Bielcik, J., Bielcikova, J., Bland, L.C., Blyth, S.-L., Bonner, B.E., Botje, M., Bouchet, J., Brandin, A.V., Bravar, A., Bystersky, M., Cadman, R.V., Cai,X.Z., Caines, H., Calderon de la Barca Sanchez, M., Castillo, J., Catu,O., Cebra, D., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., Chen,H.F., Chen, J.H., Cheng, J., Cherney, M., Chikanian, A., Christie, W., Coffin, J.P., Cormier, T.M., Cosentino, M.R., Cramer, J.G., Crawford,H.J., Das, D., Das, S., Daugherity, M., de Moura, M.M., Dedovich, T.G., DePhillips, M., Derevschikov, A.A., Didenko, L., Dietel, T., Djawotho,P., Dogra, S.M., Dong, W.J., Dong, X., Draper, J.E., Du, F., Dunin, V.B., Dunlop, J.C., Dutta Mazumdar, M.R., Eckardt, V., Edwards, W.R., Efimov,L.G., Emelianov, V., Engelage,J., Eppley, G., Erazmus, B., Estienne, M., Fachini, P., Fatemi, R., Fedorisin, J., Filimonov, K., Filip, P., Finch,E., Fine, V., Fisyak, Y., Fu, J., Gagliardi, C.A., Gaillard, L., Ganti,M.S., Ghazikhanian, V., Ghosh, P., Gonzalez, J.S., Gorbunov, Y.G., Gos,H., Grebenyuk, O., Grosnick, D., Guertin, S.M., Guimaraes, K.S.F.F., Guo,Y., Gupta, N., Gutierrez, T.D., Haag, B., Hallman, T.J., Hamed, A., Harris, J.W., He, W., Heinz, M., Henry, T.W., Hepplemann, S., Hippolyte,B., Hirsch, A., Hjort, E., Hoffman, A.M., Hoffmann, G.W., Horner, M.J., Huang, H.Z., Huang, S.L., Hughes, E.W., Humanic, T.J., Igo, G., Jacobs,P., Jacobs, W.W., Jakl, P., Jia, F., Jiang, H., Jones, P.G., Judd, E.G., Kabana, S., Kang, K., Kapitan, J., Kaplan, M., Keane, D., Kechechyan, A., Khodyrev, V.Yu., Kim, B.C., Kiryluk, J., Kisiel, A., Kislov, E.M., Klein,S.R., Kocoloski, A., Koetke, D.D., and et al. Rapidity and species dependence of particle production at largetransverse momentum for d+Au collisions at psNN = 200 GeV. United States: N. p., 2006. Web. doi:10.2172/902461.
Abelev, B.I., 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., Bhardwaj, S., Bhasin, A., Bhati, A.K., Bichsel, H., Bielcik, J., Bielcikova, J., Bland, L.C., Blyth, S.-L., Bonner, B.E., Botje, M., Bouchet, J., Brandin, A.V., Bravar, A., Bystersky, M., Cadman, R.V., Cai,X.Z., Caines, H., Calderon de la Barca Sanchez, M., Castillo, J., Catu,O., Cebra, D., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., Chen,H.F., Chen, J.H., Cheng, J., Cherney, M., Chikanian, A., Christie, W., Coffin, J.P., Cormier, T.M., Cosentino, M.R., Cramer, J.G., Crawford,H.J., Das, D., Das, S., Daugherity, M., de Moura, M.M., Dedovich, T.G., DePhillips, M., Derevschikov, A.A., Didenko, L., Dietel, T., Djawotho,P., Dogra, S.M., Dong, W.J., Dong, X., Draper, J.E., Du, F., Dunin, V.B., Dunlop, J.C., Dutta Mazumdar, M.R., Eckardt, V., Edwards, W.R., Efimov,L.G., Emelianov, V., Engelage,J., Eppley, G., Erazmus, B., Estienne, M., Fachini, P., Fatemi, R., Fedorisin, J., Filimonov, K., Filip, P., Finch,E., Fine, V., Fisyak, Y., Fu, J., Gagliardi, C.A., Gaillard, L., Ganti,M.S., Ghazikhanian, V., Ghosh, P., Gonzalez, J.S., Gorbunov, Y.G., Gos,H., Grebenyuk, O., Grosnick, D., Guertin, S.M., Guimaraes, K.S.F.F., Guo,Y., Gupta, N., Gutierrez, T.D., Haag, B., Hallman, T.J., Hamed, A., Harris, J.W., He, W., Heinz, M., Henry, T.W., Hepplemann, S., Hippolyte,B., Hirsch, A., Hjort, E., Hoffman, A.M., Hoffmann, G.W., Horner, M.J., Huang, H.Z., Huang, S.L., Hughes, E.W., Humanic, T.J., Igo, G., Jacobs,P., Jacobs, W.W., Jakl, P., Jia, F., Jiang, H., Jones, P.G., Judd, E.G., Kabana, S., Kang, K., Kapitan, J., Kaplan, M., Keane, D., Kechechyan, A., Khodyrev, V.Yu., Kim, B.C., Kiryluk, J., Kisiel, A., Kislov, E.M., Klein,S.R., Kocoloski, A., Koetke, D.D., & et al. Rapidity and species dependence of particle production at largetransverse momentum for d+Au collisions at psNN = 200 GeV. United States. doi:10.2172/902461.
Abelev, B.I., 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., Bhardwaj, S., Bhasin, A., Bhati, A.K., Bichsel, H., Bielcik, J., Bielcikova, J., Bland, L.C., Blyth, S.-L., Bonner, B.E., Botje, M., Bouchet, J., Brandin, A.V., Bravar, A., Bystersky, M., Cadman, R.V., Cai,X.Z., Caines, H., Calderon de la Barca Sanchez, M., Castillo, J., Catu,O., Cebra, D., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., Chen,H.F., Chen, J.H., Cheng, J., Cherney, M., Chikanian, A., Christie, W., Coffin, J.P., Cormier, T.M., Cosentino, M.R., Cramer, J.G., Crawford,H.J., Das, D., Das, S., Daugherity, M., de Moura, M.M., Dedovich, T.G., DePhillips, M., Derevschikov, A.A., Didenko, L., Dietel, T., Djawotho,P., Dogra, S.M., Dong, W.J., Dong, X., Draper, J.E., Du, F., Dunin, V.B., Dunlop, J.C., Dutta Mazumdar, M.R., Eckardt, V., Edwards, W.R., Efimov,L.G., Emelianov, V., Engelage,J., Eppley, G., Erazmus, B., Estienne, M., Fachini, P., Fatemi, R., Fedorisin, J., Filimonov, K., Filip, P., Finch,E., Fine, V., Fisyak, Y., Fu, J., Gagliardi, C.A., Gaillard, L., Ganti,M.S., Ghazikhanian, V., Ghosh, P., Gonzalez, J.S., Gorbunov, Y.G., Gos,H., Grebenyuk, O., Grosnick, D., Guertin, S.M., Guimaraes, K.S.F.F., Guo,Y., Gupta, N., Gutierrez, T.D., Haag, B., Hallman, T.J., Hamed, A., Harris, J.W., He, W., Heinz, M., Henry, T.W., Hepplemann, S., Hippolyte,B., Hirsch, A., Hjort, E., Hoffman, A.M., Hoffmann, G.W., Horner, M.J., Huang, H.Z., Huang, S.L., Hughes, E.W., Humanic, T.J., Igo, G., Jacobs,P., Jacobs, W.W., Jakl, P., Jia, F., Jiang, H., Jones, P.G., Judd, E.G., Kabana, S., Kang, K., Kapitan, J., Kaplan, M., Keane, D., Kechechyan, A., Khodyrev, V.Yu., Kim, B.C., Kiryluk, J., Kisiel, A., Kislov, E.M., Klein,S.R., Kocoloski, A., Koetke, D.D., and et al. Tue . "Rapidity and species dependence of particle production at largetransverse momentum for d+Au collisions at psNN = 200 GeV". United States. doi:10.2172/902461. https://www.osti.gov/servlets/purl/902461.
@article{osti_902461,
title = {Rapidity and species dependence of particle production at largetransverse momentum for d+Au collisions at psNN = 200 GeV},
author = {Abelev, B.I. and Adams, J. and Aggarwal, M.M. and Ahammed, Z. and Amonett,J. and Anderson, B.D. and Anderson, M. and Arkhipkin, D. and Averichev, G.S. and Bai,Y. and Balewski, J. and Barannikova, O. and Barnby, L.S. and Baudot, J. and Bekele, S. and Belaga, V.V. and Bellingeri-Laurikainen, A. and Bellwied, R. and Benedosso, F. and Bhardwaj, S. and Bhasin, A. and Bhati, A.K. and Bichsel, H. and Bielcik, J. and Bielcikova, J. and Bland, L.C. and Blyth, S.-L. and Bonner, B.E. and Botje, M. and Bouchet, J. and Brandin, A.V. and Bravar, A. and Bystersky, M. and Cadman, R.V. and Cai,X.Z. and Caines, H. and Calderon de la Barca Sanchez, M. and Castillo, J. and Catu,O. and Cebra, D. and Chajecki, Z. and Chaloupka, P. and Chattopadhyay, S. and Chen,H.F. and Chen, J.H. and Cheng, J. and Cherney, M. and Chikanian, A. and Christie, W. and Coffin, J.P. and Cormier, T.M. and Cosentino, M.R. and Cramer, J.G. and Crawford,H.J. and Das, D. and Das, S. and Daugherity, M. and de Moura, M.M. and Dedovich, T.G. and DePhillips, M. and Derevschikov, A.A. and Didenko, L. and Dietel, T. and Djawotho,P. and Dogra, S.M. and Dong, W.J. and Dong, X. and Draper, J.E. and Du, F. and Dunin, V.B. and Dunlop, J.C. and Dutta Mazumdar, M.R. and Eckardt, V. and Edwards, W.R. and Efimov,L.G. and Emelianov, V. and Engelage,J. and Eppley, G. and Erazmus, B. and Estienne, M. and Fachini, P. and Fatemi, R. and Fedorisin, J. and Filimonov, K. and Filip, P. and Finch,E. and Fine, V. and Fisyak, Y. and Fu, J. and Gagliardi, C.A. and Gaillard, L. and Ganti,M.S. and Ghazikhanian, V. and Ghosh, P. and Gonzalez, J.S. and Gorbunov, Y.G. and Gos,H. and Grebenyuk, O. and Grosnick, D. and Guertin, S.M. and Guimaraes, K.S.F.F. and Guo,Y. and Gupta, N. and Gutierrez, T.D. and Haag, B. and Hallman, T.J. and Hamed, A. and Harris, J.W. and He, W. and Heinz, M. and Henry, T.W. and Hepplemann, S. and Hippolyte,B. and Hirsch, A. and Hjort, E. and Hoffman, A.M. and Hoffmann, G.W. and Horner, M.J. and Huang, H.Z. and Huang, S.L. and Hughes, E.W. and Humanic, T.J. and Igo, G. and Jacobs,P. and Jacobs, W.W. and Jakl, P. and Jia, F. and Jiang, H. and Jones, P.G. and Judd, E.G. and Kabana, S. and Kang, K. and Kapitan, J. and Kaplan, M. and Keane, D. and Kechechyan, A. and Khodyrev, V.Yu. and Kim, B.C. and Kiryluk, J. and Kisiel, A. and Kislov, E.M. and Klein,S.R. and Kocoloski, A. and Koetke, D.D. and et al.},
abstractNote = {We determine rapidity asymmetry in the production of charged pions, protons and anti-protons for large transverse momentum (p{sub T}) for d+Au collisions at {radical}s{sub NN} = 200 GeV. The rapidity asymmetry is defined as the ratio of particle yields at backward rapidity (Au beam direction or -ve rapidity) to those at forward rapidity (d beam direction or +ve rapidity). The identified hadrons are measured in the rapidity regions |y| < 0.5 and 0.5 < |y| < 1.0 for the p{sub T} range 2.5 < p{sub T} < 10 GeV/c. We observe significant rapidity asymmetry for charged pion and proton+anti-proton production in both rapidity regions. The asymmetry is larger for 0.5 < |y| < 1.0 than for |y| < 0.5 and is almost independent of particle type. The measurements are compared to various model predictions employing multiple scattering, energy loss, nuclear shadowing, saturation effects, and recombination, and also to a phenomenological parton model. We find that asymmetries are sensitive to model parameters and show model-preference. The rapidity dependence of {pi}{sup -}/{pi}{sup +} and {bar p}/p ratios in peripheral d+Au and forward neutron-tagged events are used to study the contributions of valence quarks and gluons to particle production at high p{sub T}. The results are compared to calculations based on NLO pQCD and other measurements of quark fragmentation functions.},
doi = {10.2172/902461},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 19 00:00:00 EST 2006},
month = {Tue Dec 19 00:00:00 EST 2006}
}

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  • We determine rapidity asymmetry in the production of charged pions, protons, and antiprotons for large transverse momentum (p{sub T}) for d+Au collisions at {radical}s{sub NN} = 200 GeV. The rapidity asymmetry is defined as the ratio of particle yields at backward rapidity (Au beam direction) to those at forward rapidity (d beam direction). The identified hadrons are measured in the rapidity regions |y| < 0.5 and 0.5 < |y| < 1.0 for the p{sub T} range 2.5 < p{sub T} < 10 GeV/c. We observe significant rapidity asymmetry for charged pion and proton+antiproton production in both the rapidity regions. Themore » asymmetry is larger for 0.5 < |y| < 1.0 than for |y| < 0.5 and is almost independent of particle type. The measurements are compared to various model predictions employing multiple scattering, energy loss, nuclear shadowing, saturation effects, and recombination and also to a phenomenological parton model. We find that asymmetries are sensitive to model parameters and show model preference. The rapidity dependence of {pi}{sup -}/{pi}{sup +} and {bar p}/p ratios in peripheral d+Au and forward neutron-tagged events are used to study the contributions of valence quarks and gluons to particle production at high p{sub T}.« less
  • We determine rapidity asymmetry in the production of charged pions, protons, and antiprotons for large transverse momentum (p{sub T}) for d+Au collisions at {radical}(s{sub NN})=200 GeV. The rapidity asymmetry is defined as the ratio of particle yields at backward rapidity (Au beam direction) to those at forward rapidity (d beam direction). The identified hadrons are measured in the rapidity regions |y|<0.5 and 0.5<|y|<1.0 for the p{sub T} range 2.5<p{sub T}<10 GeV/c. We observe significant rapidity asymmetry for charged pion and proton+antiproton production in both the rapidity regions. The asymmetry is larger for 0.5<|y|<1.0 than for |y|<0.5 and is almost independentmore » of particle type. The measurements are compared to various model predictions employing multiple scattering, energy loss, nuclear shadowing, saturation effects, and recombination and also to a phenomenological parton model. We find that asymmetries are sensitive to model parameters and show model preference. The rapidity dependence of {pi}{sup -}/{pi}{sup +} and p/p ratios in peripheral d+Au and forward neutron-tagged events are used to study the contributions of valence quarks and gluons to particle production at high p{sub T}.« less
  • Two-particle correlations of identical charged pion pairs from Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV were measured by the PHOBOS experiment at BNL Relativistic Heavy Ion Collider (RHIC). Data for the 15% most central events were analyzed with Bertsch-Pratt and Yano-Koonin-Podgoretskii parametrizations using pairs with rapidities of 0.4<y{sub {pi}}{sub {pi}}<1.3 and transverse momenta 0.1<k{sub T}<1.4 GeV/c. The Bertsch-Pratt radii R{sub o} and R{sub l} decrease as a function of pair transverse momentum. R{sub o} and R{sub s} are independent of collision energy, while R{sub l} shows a slight increase. The source rapidity y{sub YKP} scales roughly with the pairmore » rapidity y{sub {pi}}{sub {pi}}, indicating strong dynamical correlations.« less
  • The dependence of transverse momentum spectra of neutral pions and {eta} mesons with p{sub T}<16 GeV/c and p{sub T}<12 GeV/c, respectively, on the centrality of the collision has been measured at midrapidity by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) in d+Au collisions at {radical}s{sub NN}=200 GeV. The measured yields are compared to those in p+p collisions at the same {radical}s{sub NN} scaled by the number of underlying nucleon-nucleon collisions in d+Au. At all centralities, the yield ratios show no suppression, in contrast to the strong suppression seen for central Au+Au collisions at RHIC. Only amore » weak pT and centrality dependence can be observed.« less