Suppression of High-pTNeutral Pion Production in CentralPb+PbCollisions atsNN=17.3 GeVRelative top+Candp+PbCollisions

M. M. Aggarwal,Z. Ahammed,A. L. S. Angelis,V. Antonenko,V. Arefiev,V. Astakhov,V. Avdeitchikov,T. C. Awes,P. V. K. S. Baba,S. K. Badyal,S. Bathe,B. Batiounia,C. Baumann,T. Bernier,K. B. Bhalla,V. S. Bhatia,C. Blume,D. Bucher,H. Büsching,L. Carlen,S. Chattopadhyay,Michal Patrick Decowski,H. Delagrange,P. Donni,M. R. Dutta Majumdar,K. El Chenawi,A. K. Dubey,K. Enosawa,S. Fokin,V. Frolov,M. S. Ganti,S. Garpman,O. Gavrishchuk,F. J. M. Geurts,T. K. Ghosh,R. Glasow,B. Guskov,H. Å. Gustafsson,H. H. Gutbrod,I. Hrivnacova,M. Ippolitov,H. Kalechofsky,R. Kamermans,K. Karadjev,K. Karpio,B. W. Kolb,I. Kosarev,I. Koutcheryaev,A. Kugler,P. Kulinich,M. Kurata,A. Lebedev,H. Löhner,L. Luquin,D. P. Mahapatra,V. Manko,M. Martin,G. Martinez,A. Maximov,Y. Miake,Gobinda Mishra,Bedangadas Mohanty,M.-J. Mora,D. Morrison,T. Mukhanova,D. S. Mukhopadhyay,H. Naef,B. K. Nandi,S. K. Nayak,A. Nianine,V. Nikitine,S. Nikolaev,P. Nilsson,S. Nishimura,P. Nomokonov,J. Nystrand,A. Oskarsson,I. Otterlund,S. Pavliouk,Thomas Peitzmann,D. Peressounko,V. Petráček,S. C. Phatak,W. Pinganaud,F. Plasil,M. L. Purschke,J. Rak,M. Rammler,R. Raniwala,N. K. Rao,F. Retiere,K. Reygers,G. Roland,L. Rosselet,I. Roufanov,C. Roy,J. M. Rubio,S. S. Sambyal,R. Santo,S. Sato,H. Schlagheck,H.-R. Schmidt,Y. Schutz,G. Shabratova,T. H. Shah,I. Sibiriak,T. Siemiarczuk,D. Silvermyr,B. C. Sinha,N. Slavine,K. Söderström,G. Sood,S. P. Sørensen,P. Stankus,Grzegorz Stefanek,P. Steinberg,E. Stenlund,M. Sumbera,T. Svensson,A. Tsvetkov,L. Tykarski,E. C. V.D. Pijll,N. V. Eijndhoven,G. J. V. Nieuwenhuizen,A. Vinogradov,Y. P. Viyogi,A. Vodopianov,S. Vörös,B. Wysłouch,G. R. Young,T. K. Nayak,S. Raniwala; M. M. Aggarwal; Z. Ahammed; A. L. S. Angelis; V. Antonenko; V. Arefiev; V. Astakhov; V. Avdeitchikov; T. C. Awes; P. V. K. S. Baba; S. K. Badyal; S. Bathe; B. Batiounia; C. Baumann; T. Bernier; K. B. Bhalla; V. S. Bhatia; C. Blume; D. Bucher; H. Büsching; L. Carlen; S. Chattopadhyay; Michal Patrick Decowski; H. Delagrange; P. Donni; M. R. Dutta Majumdar; K. El Chenawi; A. K. Dubey; K. Enosawa; S. Fokin; V. Frolov; M. S. Ganti; S. Garpman; O. Gavrishchuk; F. J. M. Geurts; T. K. Ghosh; R. Glasow; B. Guskov; H. Å. Gustafsson; H. H. Gutbrod; I. Hrivnacova; M. Ippolitov; H. Kalechofsky; R. Kamermans; K. Karadjev; K. Karpio; B. W. Kolb; I. Kosarev; I. Koutcheryaev; A. Kugler; P. Kulinich; M. Kurata; A. Lebedev; H. Löhner; L. Luquin; D. P. Mahapatra; V. Manko; M. Martin; G. Martinez; A. Maximov; Y. Miake; Gobinda Mishra; Bedangadas Mohanty; M.-J. Mora; D. Morrison; T. Mukhanova; D. S. Mukhopadhyay; H. Naef; B. K. Nandi; S. K. Nayak; A. Nianine; V. Nikitine; S. Nikolaev; P. Nilsson; S. Nishimura; P. Nomokonov; J. Nystrand; A. Oskarsson; I. Otterlund; S. Pavliouk; Thomas Peitzmann; D. Peressounko; V. Petráček; S. C. Phatak; W. Pinganaud; F. Plasil; M. L. Purschke; J. Rak; M. Rammler; R. Raniwala; N. K. Rao; F. Retiere; K. Reygers; G. Roland; L. Rosselet; I. Roufanov; C. Roy; J. M. Rubio; S. S. Sambyal; R. Santo; S. Sato; H. Schlagheck; H.-R. Schmidt; Y. Schutz; G. Shabratova; T. H. Shah; I. Sibiriak; T. Siemiarczuk; D. Silvermyr; B. C. Sinha; N. Slavine; K. Söderström; G. Sood; S. P. Sørensen; P. Stankus; Grzegorz Stefanek; P. Steinberg; E. Stenlund; M. Sumbera; T. Svensson; A. Tsvetkov; L. Tykarski; E. C. V.D. Pijll; N. V. Eijndhoven; G. J. V. Nieuwenhuizen; A. Vinogradov; Y. P. Viyogi; A. Vodopianov; S. Vörös; B. Wysłouch; G. R. Young; T. K. Nayak; S. Raniwala

Suppression of High-pTNeutral Pion Production in CentralPb+PbCollisions atsNN=17.3 GeVRelative top+Candp+PbCollisions

M. M. Aggarwal,Z. Ahammed,A. L. S. Angelis,V. Antonenko,V. Arefiev,V. Astakhov,V. Avdeitchikov,T. C. Awes,P. V. K. S. Baba,S. K. Badyal,S. Bathe,B. Batiounia,C. Baumann,T. Bernier,K. B. Bhalla,V. S. Bhatia,C. Blume,D. Bucher,H. Büsching,L. Carlen,S. Chattopadhyay,Michal Patrick Decowski,H. Delagrange,P. Donni,M. R. Dutta Majumdar,K. El Chenawi,A. K. Dubey,K. Enosawa,S. Fokin,V. Frolov,M. S. Ganti,S. Garpman,O. Gavrishchuk,F. J. M. Geurts,T. K. Ghosh,R. Glasow,B. Guskov,H. Å. Gustafsson,H. H. Gutbrod,I. Hrivnacova,M. Ippolitov,H. Kalechofsky,R. Kamermans,K. Karadjev,K. Karpio,B. W. Kolb,I. Kosarev,I. Koutcheryaev,A. Kugler,P. Kulinich,M. Kurata,A. Lebedev,H. Löhner,L. Luquin,D. P. Mahapatra,V. Manko,M. Martin,G. Martinez,A. Maximov,Y. Miake,Gobinda Mishra,Bedangadas Mohanty,M.-J. Mora,D. Morrison,T. Mukhanova,D. S. Mukhopadhyay,H. Naef,B. K. Nandi,S. K. Nayak,A. Nianine,V. Nikitine,S. Nikolaev,P. Nilsson,S. Nishimura,P. Nomokonov,J. Nystrand,A. Oskarsson,I. Otterlund,S. Pavliouk,Thomas Peitzmann,D. Peressounko,V. Petráček,S. C. Phatak,W. Pinganaud,F. Plasil,M. L. Purschke,J. Rak,M. Rammler,R. Raniwala,N. K. Rao,F. Retiere,K. Reygers,G. Roland,L. Rosselet,I. Roufanov,C. Roy,J. M. Rubio,S. S. Sambyal,R. Santo,S. Sato,H. Schlagheck,H.-R. Schmidt,Y. Schutz,G. Shabratova,T. H. Shah,I. Sibiriak,T. Siemiarczuk,D. Silvermyr,B. C. Sinha,N. Slavine,K. Söderström,G. Sood,S. P. Sørensen,P. Stankus,Grzegorz Stefanek,P. Steinberg,E. Stenlund,M. Sumbera,T. Svensson,A. Tsvetkov,L. Tykarski,E. C. V.D. Pijll,N. V. Eijndhoven,G. J. V. Nieuwenhuizen,A. Vinogradov,Y. P. Viyogi,A. Vodopianov,S. Vörös,B. Wysłouch,G. R. Young,T. K. Nayak,S. Raniwala;M. M. Aggarwal;Z. Ahammed;A. L. S. Angelis;V. Antonenko;V. Arefiev;V. Astakhov;V. Avdeitchikov;T. C. Awes;P. V. K. S. Baba;S. K. Badyal;S. Bathe;B. Batiounia;C. Baumann;T. Bernier;K. B. Bhalla;V. S. Bhatia;C. Blume;D. Bucher;H. Büsching;L. Carlen;S. Chattopadhyay;Michal Patrick Decowski;H. Delagrange;P. Donni;M. R. Dutta Majumdar;K. El Chenawi;A. K. Dubey;K. Enosawa;S. Fokin;V. Frolov;M. S. Ganti;S. Garpman;O. Gavrishchuk;F. J. M. Geurts;T. K. Ghosh;R. Glasow;B. Guskov;H. Å. Gustafsson;H. H. Gutbrod;I. Hrivnacova;M. Ippolitov;H. Kalechofsky;R. Kamermans;K. Karadjev;K. Karpio;B. W. Kolb;I. Kosarev;I. Koutcheryaev;A. Kugler;P. Kulinich;M. Kurata;A. Lebedev;H. Löhner;L. Luquin;D. P. Mahapatra;V. Manko;M. Martin;G. Martinez;A. Maximov;Y. Miake;Gobinda Mishra;Bedangadas Mohanty;M.-J. Mora;D. Morrison;T. Mukhanova;D. S. Mukhopadhyay;H. Naef;B. K. Nandi;S. K. Nayak;A. Nianine;V. Nikitine;S. Nikolaev;P. Nilsson;S. Nishimura;P. Nomokonov;J. Nystrand;A. Oskarsson;I. Otterlund;S. Pavliouk;Thomas Peitzmann;D. Peressounko;V. Petráček;S. C. Phatak;W. Pinganaud;F. Plasil;M. L. Purschke;J. Rak;M. Rammler;R. Raniwala;N. K. Rao;F. Retiere;K. Reygers;G. Roland;L. Rosselet;I. Roufanov;C. Roy;J. M. Rubio;S. S. Sambyal;R. Santo;S. Sato;H. Schlagheck;H.-R. Schmidt;Y. Schutz;G. Shabratova;T. H. Shah;I. Sibiriak;T. Siemiarczuk;D. Silvermyr;B. C. Sinha;N. Slavine;K. Söderström;G. Sood;S. P. Sørensen;P. Stankus;Grzegorz Stefanek;P. Steinberg;E. Stenlund;M. Sumbera;T. Svensson;A. Tsvetkov;L. Tykarski;E. C. V.D. Pijll;N. V. Eijndhoven;G. J. V. Nieuwenhuizen;A. Vinogradov;Y. P. Viyogi;A. Vodopianov;S. Vörös;B. Wysłouch;G. R. Young;T. K. Nayak;S. Raniwala;

physical review letters 2008 Vol. 100 pp. 242301-

165

raniwala2008physicalsuppression

Abstract

Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sNN=17.4 GeV at midrapidity (2.3≲ηlab≲3.0) over the range 0.7≲pT≲3.5 GeV/c. The spectra are compared to π0 spectra measured in Pb+Pb collisions at sNN=17.3 GeV in the same experiment. For a wide range of Pb+Pb centralities (Npart≲300), the yield of π0’s with pT≳2 GeV/c is larger than or consistent with the p+C or p+Pb yields scaled with the number of nucleon-nucleon collisions (Ncoll), while for central Pb+Pb collisions with Npart≳350, the π0 yield is suppressed.

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transverse pb collisions pion nucleon ncoll pbcollisions centralpb ptneutral

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10.1103/physrevlett.100.242301

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