Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions
Fast parton probes produced by hard scattering and embedded within collisions of large nuclei have shown that partons suffer large energy loss and that the produced medium may respond collectively to the lost energy. We present measurements of neutral pion trigger particles at transverse momenta p^t...
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| creator | Adare, A. Afanasiev, S. Aidala, C. Ajitanand, N. N. Akiba, Y. Al-Bataineh, H. Alexander, J. Alho, T. Aoki, K. Aphecetche, Laurent Aramaki, Y. Asai, J. Atomssa, E. T. Averbeck, R. Awes, T. C. Azmoun, B. Babintsev, V. Bai, M. Baksay, G. Baksay, L. Baldisseri, A. Barish, K. N. Barnes, P. D. Bassalleck, B. Basye, A. T. Bathe, S. Batsouli, S. Baublis, V. Baumann, Cédric Bazilevsky, A. Belikov, S. Belmont, R. Bennett, R. Berdnikov, A. Berdnikov, Y. Bickley, A. A. Boissevain, J. G. Bok, J. S. Borel, H. Boyle, K. Brooks, M. L. Buesching, H. Bumazhnov, V. Bunce, G. Butsyk, S. Muñoz Camacho, C. Campbell, S. Chang, B. S. Chang, W. C. Charvet, J. -L. Chen, C. -H. Chernichenko, S. Chi, C. Y. Chiu, M. Choi, I. J. Choudhury, R. K. Christiansen, P. Chujo, T. Chung, P. Churyn, A. Chvala, O. Cianciolo, V. Citron, Z. Cole, B. A. Connors, M. Constantin, P. Csanád, M. Csörgő, T. Dahms, T. Dairaku, S. Danchev, I. Das, K. Datta, A. David, G. Denisov, A. d'Enterria, D. Deshpande, A. Desmond, E. J. Dietzsch, O. Dion, A. Donadelli, M. Drapier, O. Drees, A. Drees, K. A. Dubey, A. K. Durham, M. Durum, A. Dutta, D. Dzhordzhadze, V. Edwards, S. Efremenko, Y. V. Ellinghaus, F. Engelmore, T. Enokizono, A. En'Yo, H. Esumi, S. Eyser, K. O. Fadem, B. Fields, D. E. Finger, M. |
| description | Fast parton probes produced by hard scattering and embedded within collisions of large nuclei have shown that partons suffer large energy loss and that the produced medium may respond collectively to the lost energy. We present measurements of neutral pion trigger particles at transverse momenta p^t_T = 4-12 GeV/c and associated charged hadrons (p^a_T = 0.5-7 GeV/c) as a function of relative azimuthal angle Delta Phi at midrapidity in Au+Au and p+p collisions at sqrt(s_NN) = 200 GeV. These data lead to two major observations. First, the relative angular distribution of low momentum hadrons, whose shape modification has been interpreted as a medium response to parton energy loss, is found to be modified only for p^t_T < 7 GeV/c. At higher p^t_T, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p^a_T. This observation presents a quantitative challenge to medium response scenarios. Second, the associated yield of hadrons opposite to the trigger particle in Au+Au relative to that in p+p (I_AA) is found to be suppressed at large momentum (IAA ~ 0.35-0.5), but less than the single particle nuclear modification factor (R_AA ~0.2). |
| doi_str_mv | 10.1103/PhysRevLett.104.252301 |
| format | Article |
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N. ; Akiba, Y. ; Al-Bataineh, H. ; Alexander, J. ; Alho, T. ; Aoki, K. ; Aphecetche, Laurent ; Aramaki, Y. ; Asai, J. ; Atomssa, E. T. ; Averbeck, R. ; Awes, T. C. ; Azmoun, B. ; Babintsev, V. ; Bai, M. ; Baksay, G. ; Baksay, L. ; Baldisseri, A. ; Barish, K. N. ; Barnes, P. D. ; Bassalleck, B. ; Basye, A. T. ; Bathe, S. ; Batsouli, S. ; Baublis, V. ; Baumann, Cédric ; Bazilevsky, A. ; Belikov, S. ; Belmont, R. ; Bennett, R. ; Berdnikov, A. ; Berdnikov, Y. ; Bickley, A. A. ; Boissevain, J. G. ; Bok, J. S. ; Borel, H. ; Boyle, K. ; Brooks, M. L. ; Buesching, H. ; Bumazhnov, V. ; Bunce, G. ; Butsyk, S. ; Muñoz Camacho, C. ; Campbell, S. ; Chang, B. S. ; Chang, W. C. ; Charvet, J. -L. ; Chen, C. -H. ; Chernichenko, S. ; Chi, C. Y. ; Chiu, M. ; Choi, I. J. ; Choudhury, R. K. ; Christiansen, P. ; Chujo, T. ; Chung, P. ; Churyn, A. ; Chvala, O. ; Cianciolo, V. ; Citron, Z. ; Cole, B. A. ; Connors, M. ; Constantin, P. ; Csanád, M. ; Csörgő, T. ; Dahms, T. ; Dairaku, S. ; Danchev, I. ; Das, K. ; Datta, A. ; David, G. ; Denisov, A. ; d'Enterria, D. ; Deshpande, A. ; Desmond, E. J. ; Dietzsch, O. ; Dion, A. ; Donadelli, M. ; Drapier, O. ; Drees, A. ; Drees, K. A. ; Dubey, A. K. ; Durham, M. ; Durum, A. ; Dutta, D. ; Dzhordzhadze, V. ; Edwards, S. ; Efremenko, Y. V. ; Ellinghaus, F. ; Engelmore, T. ; Enokizono, A. ; En'Yo, H. ; Esumi, S. ; Eyser, K. O. ; Fadem, B. ; Fields, D. E. ; Finger, M.</creator><creatorcontrib>Adare, A. ; Afanasiev, S. ; Aidala, C. ; Ajitanand, N. N. ; Akiba, Y. ; Al-Bataineh, H. ; Alexander, J. ; Alho, T. ; Aoki, K. ; Aphecetche, Laurent ; Aramaki, Y. ; Asai, J. ; Atomssa, E. T. ; Averbeck, R. ; Awes, T. C. ; Azmoun, B. ; Babintsev, V. ; Bai, M. ; Baksay, G. ; Baksay, L. ; Baldisseri, A. ; Barish, K. N. ; Barnes, P. D. ; Bassalleck, B. ; Basye, A. T. ; Bathe, S. ; Batsouli, S. ; Baublis, V. ; Baumann, Cédric ; Bazilevsky, A. ; Belikov, S. ; Belmont, R. ; Bennett, R. ; Berdnikov, A. ; Berdnikov, Y. ; Bickley, A. A. ; Boissevain, J. G. ; Bok, J. S. ; Borel, H. ; Boyle, K. ; Brooks, M. L. ; Buesching, H. ; Bumazhnov, V. ; Bunce, G. ; Butsyk, S. ; Muñoz Camacho, C. ; Campbell, S. ; Chang, B. S. ; Chang, W. C. ; Charvet, J. -L. ; Chen, C. -H. ; Chernichenko, S. ; Chi, C. Y. ; Chiu, M. ; Choi, I. J. ; Choudhury, R. K. ; Christiansen, P. ; Chujo, T. ; Chung, P. ; Churyn, A. ; Chvala, O. ; Cianciolo, V. ; Citron, Z. ; Cole, B. A. ; Connors, M. ; Constantin, P. ; Csanád, M. ; Csörgő, T. ; Dahms, T. ; Dairaku, S. ; Danchev, I. ; Das, K. ; Datta, A. ; David, G. ; Denisov, A. ; d'Enterria, D. ; Deshpande, A. ; Desmond, E. J. ; Dietzsch, O. ; Dion, A. ; Donadelli, M. ; Drapier, O. ; Drees, A. ; Drees, K. A. ; Dubey, A. K. ; Durham, M. ; Durum, A. ; Dutta, D. ; Dzhordzhadze, V. ; Edwards, S. ; Efremenko, Y. V. ; Ellinghaus, F. ; Engelmore, T. ; Enokizono, A. ; En'Yo, H. ; Esumi, S. ; Eyser, K. O. ; Fadem, B. ; Fields, D. E. ; Finger, M.</creatorcontrib><description>Fast parton probes produced by hard scattering and embedded within collisions of large nuclei have shown that partons suffer large energy loss and that the produced medium may respond collectively to the lost energy. We present measurements of neutral pion trigger particles at transverse momenta p^t_T = 4-12 GeV/c and associated charged hadrons (p^a_T = 0.5-7 GeV/c) as a function of relative azimuthal angle Delta Phi at midrapidity in Au+Au and p+p collisions at sqrt(s_NN) = 200 GeV. These data lead to two major observations. First, the relative angular distribution of low momentum hadrons, whose shape modification has been interpreted as a medium response to parton energy loss, is found to be modified only for p^t_T < 7 GeV/c. At higher p^t_T, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p^a_T. This observation presents a quantitative challenge to medium response scenarios. Second, the associated yield of hadrons opposite to the trigger particle in Au+Au relative to that in p+p (I_AA) is found to be suppressed at large momentum (IAA ~ 0.35-0.5), but less than the single particle nuclear modification factor (R_AA ~0.2).</description><identifier>ISSN: 0031-9007</identifier><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.104.252301</identifier><language>eng</language><publisher>American Physical Society</publisher><subject>Nuclear Experiment ; Physics</subject><ispartof>Physical review letters, 2010, Vol.104</ispartof><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><orcidid>0000-0002-4202-3740 ; 0000-0003-3701-8119 ; 0000-0001-7662-3878 ; 0000-0003-0866-7523 ; 0000-0002-1275-7292 ; 0000-0002-4202-3740 ; 0000-0001-7662-3878</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,777,781,882,4010,27904,27905,27906</link.rule.ids><backlink>$$Uhttps://in2p3.hal.science/in2p3-00497570$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Adare, A.</creatorcontrib><creatorcontrib>Afanasiev, S.</creatorcontrib><creatorcontrib>Aidala, C.</creatorcontrib><creatorcontrib>Ajitanand, N. 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E.</creatorcontrib><creatorcontrib>Finger, M.</creatorcontrib><title>Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions</title><title>Physical review letters</title><description>Fast parton probes produced by hard scattering and embedded within collisions of large nuclei have shown that partons suffer large energy loss and that the produced medium may respond collectively to the lost energy. We present measurements of neutral pion trigger particles at transverse momenta p^t_T = 4-12 GeV/c and associated charged hadrons (p^a_T = 0.5-7 GeV/c) as a function of relative azimuthal angle Delta Phi at midrapidity in Au+Au and p+p collisions at sqrt(s_NN) = 200 GeV. These data lead to two major observations. First, the relative angular distribution of low momentum hadrons, whose shape modification has been interpreted as a medium response to parton energy loss, is found to be modified only for p^t_T < 7 GeV/c. At higher p^t_T, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p^a_T. This observation presents a quantitative challenge to medium response scenarios. Second, the associated yield of hadrons opposite to the trigger particle in Au+Au relative to that in p+p (I_AA) is found to be suppressed at large momentum (IAA ~ 0.35-0.5), but less than the single particle nuclear modification factor (R_AA ~0.2).</description><subject>Nuclear Experiment</subject><subject>Physics</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqVjd9KwzAUxoMoWJ2vILmX1nOaztjLMZUOJsi2G69CWDJ6JEtLEgv16d2KL-DV94cf38fYPUKBCOLxox3jxg5rm1KBUBXlvBSAFyxDkHUuEatLlgEIzGsAec1uYvwCACyfnjPmd8F6Ezl5_knWGa694YsfOn6nVju-bXVv-Xtn6EB7najzZ_KFWm3CyS-7EKyb-mliM4WBYqI9b6weRr6aMOconqEZuzpoF-3dn96yh7fX3bLJT2eqD3TUYVSdJtUs1op82QsFUNVyLmFA8T_6F7qIWBM</recordid><startdate>2010</startdate><enddate>2010</enddate><creator>Adare, A.</creator><creator>Afanasiev, S.</creator><creator>Aidala, C.</creator><creator>Ajitanand, N. 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O.</creator><creator>Fadem, B.</creator><creator>Fields, D. E.</creator><creator>Finger, M.</creator><general>American Physical Society</general><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-4202-3740</orcidid><orcidid>https://orcid.org/0000-0003-3701-8119</orcidid><orcidid>https://orcid.org/0000-0001-7662-3878</orcidid><orcidid>https://orcid.org/0000-0003-0866-7523</orcidid><orcidid>https://orcid.org/0000-0002-1275-7292</orcidid><orcidid>https://orcid.org/0000-0002-4202-3740</orcidid><orcidid>https://orcid.org/0000-0001-7662-3878</orcidid></search><sort><creationdate>2010</creationdate><title>Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions</title><author>Adare, A. ; Afanasiev, S. ; Aidala, C. ; Ajitanand, N. N. ; Akiba, Y. ; Al-Bataineh, H. ; Alexander, J. ; Alho, T. ; Aoki, K. ; Aphecetche, Laurent ; Aramaki, Y. ; Asai, J. ; Atomssa, E. T. ; Averbeck, R. ; Awes, T. C. ; Azmoun, B. ; Babintsev, V. ; Bai, M. ; Baksay, G. ; Baksay, L. ; Baldisseri, A. ; Barish, K. N. ; Barnes, P. D. ; Bassalleck, B. ; Basye, A. T. ; Bathe, S. ; Batsouli, S. ; Baublis, V. ; Baumann, Cédric ; Bazilevsky, A. ; Belikov, S. ; Belmont, R. ; Bennett, R. ; Berdnikov, A. ; Berdnikov, Y. ; Bickley, A. A. ; Boissevain, J. G. ; Bok, J. S. ; Borel, H. ; Boyle, K. ; Brooks, M. L. ; Buesching, H. ; Bumazhnov, V. ; Bunce, G. ; Butsyk, S. ; Muñoz Camacho, C. ; Campbell, S. ; Chang, B. S. ; Chang, W. C. ; Charvet, J. -L. ; Chen, C. -H. ; Chernichenko, S. ; Chi, C. Y. ; Chiu, M. ; Choi, I. J. ; Choudhury, R. K. ; Christiansen, P. ; Chujo, T. ; Chung, P. ; Churyn, A. ; Chvala, O. ; Cianciolo, V. ; Citron, Z. ; Cole, B. A. ; Connors, M. ; Constantin, P. ; Csanád, M. ; Csörgő, T. ; Dahms, T. ; Dairaku, S. ; Danchev, I. ; Das, K. ; Datta, A. ; David, G. ; Denisov, A. ; d'Enterria, D. ; Deshpande, A. ; Desmond, E. J. ; Dietzsch, O. ; Dion, A. ; Donadelli, M. ; Drapier, O. ; Drees, A. ; Drees, K. A. ; Dubey, A. K. ; Durham, M. ; Durum, A. ; Dutta, D. ; Dzhordzhadze, V. ; Edwards, S. ; Efremenko, Y. V. ; Ellinghaus, F. ; Engelmore, T. ; Enokizono, A. ; En'Yo, H. ; Esumi, S. ; Eyser, K. O. ; Fadem, B. ; Fields, D. E. ; Finger, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-hal_primary_oai_HAL_in2p3_00497570v13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Nuclear Experiment</topic><topic>Physics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Adare, A.</creatorcontrib><creatorcontrib>Afanasiev, S.</creatorcontrib><creatorcontrib>Aidala, C.</creatorcontrib><creatorcontrib>Ajitanand, N. N.</creatorcontrib><creatorcontrib>Akiba, Y.</creatorcontrib><creatorcontrib>Al-Bataineh, H.</creatorcontrib><creatorcontrib>Alexander, J.</creatorcontrib><creatorcontrib>Alho, T.</creatorcontrib><creatorcontrib>Aoki, K.</creatorcontrib><creatorcontrib>Aphecetche, Laurent</creatorcontrib><creatorcontrib>Aramaki, Y.</creatorcontrib><creatorcontrib>Asai, J.</creatorcontrib><creatorcontrib>Atomssa, E. T.</creatorcontrib><creatorcontrib>Averbeck, R.</creatorcontrib><creatorcontrib>Awes, T. C.</creatorcontrib><creatorcontrib>Azmoun, B.</creatorcontrib><creatorcontrib>Babintsev, V.</creatorcontrib><creatorcontrib>Bai, M.</creatorcontrib><creatorcontrib>Baksay, G.</creatorcontrib><creatorcontrib>Baksay, L.</creatorcontrib><creatorcontrib>Baldisseri, A.</creatorcontrib><creatorcontrib>Barish, K. N.</creatorcontrib><creatorcontrib>Barnes, P. D.</creatorcontrib><creatorcontrib>Bassalleck, B.</creatorcontrib><creatorcontrib>Basye, A. T.</creatorcontrib><creatorcontrib>Bathe, S.</creatorcontrib><creatorcontrib>Batsouli, S.</creatorcontrib><creatorcontrib>Baublis, V.</creatorcontrib><creatorcontrib>Baumann, Cédric</creatorcontrib><creatorcontrib>Bazilevsky, A.</creatorcontrib><creatorcontrib>Belikov, S.</creatorcontrib><creatorcontrib>Belmont, R.</creatorcontrib><creatorcontrib>Bennett, R.</creatorcontrib><creatorcontrib>Berdnikov, A.</creatorcontrib><creatorcontrib>Berdnikov, Y.</creatorcontrib><creatorcontrib>Bickley, A. A.</creatorcontrib><creatorcontrib>Boissevain, J. G.</creatorcontrib><creatorcontrib>Bok, J. S.</creatorcontrib><creatorcontrib>Borel, H.</creatorcontrib><creatorcontrib>Boyle, K.</creatorcontrib><creatorcontrib>Brooks, M. L.</creatorcontrib><creatorcontrib>Buesching, H.</creatorcontrib><creatorcontrib>Bumazhnov, V.</creatorcontrib><creatorcontrib>Bunce, G.</creatorcontrib><creatorcontrib>Butsyk, S.</creatorcontrib><creatorcontrib>Muñoz Camacho, C.</creatorcontrib><creatorcontrib>Campbell, S.</creatorcontrib><creatorcontrib>Chang, B. S.</creatorcontrib><creatorcontrib>Chang, W. C.</creatorcontrib><creatorcontrib>Charvet, J. -L.</creatorcontrib><creatorcontrib>Chen, C. -H.</creatorcontrib><creatorcontrib>Chernichenko, S.</creatorcontrib><creatorcontrib>Chi, C. Y.</creatorcontrib><creatorcontrib>Chiu, M.</creatorcontrib><creatorcontrib>Choi, I. J.</creatorcontrib><creatorcontrib>Choudhury, R. K.</creatorcontrib><creatorcontrib>Christiansen, P.</creatorcontrib><creatorcontrib>Chujo, T.</creatorcontrib><creatorcontrib>Chung, P.</creatorcontrib><creatorcontrib>Churyn, A.</creatorcontrib><creatorcontrib>Chvala, O.</creatorcontrib><creatorcontrib>Cianciolo, V.</creatorcontrib><creatorcontrib>Citron, Z.</creatorcontrib><creatorcontrib>Cole, B. A.</creatorcontrib><creatorcontrib>Connors, M.</creatorcontrib><creatorcontrib>Constantin, P.</creatorcontrib><creatorcontrib>Csanád, M.</creatorcontrib><creatorcontrib>Csörgő, T.</creatorcontrib><creatorcontrib>Dahms, T.</creatorcontrib><creatorcontrib>Dairaku, S.</creatorcontrib><creatorcontrib>Danchev, I.</creatorcontrib><creatorcontrib>Das, K.</creatorcontrib><creatorcontrib>Datta, A.</creatorcontrib><creatorcontrib>David, G.</creatorcontrib><creatorcontrib>Denisov, A.</creatorcontrib><creatorcontrib>d'Enterria, D.</creatorcontrib><creatorcontrib>Deshpande, A.</creatorcontrib><creatorcontrib>Desmond, E. J.</creatorcontrib><creatorcontrib>Dietzsch, O.</creatorcontrib><creatorcontrib>Dion, A.</creatorcontrib><creatorcontrib>Donadelli, M.</creatorcontrib><creatorcontrib>Drapier, O.</creatorcontrib><creatorcontrib>Drees, A.</creatorcontrib><creatorcontrib>Drees, K. A.</creatorcontrib><creatorcontrib>Dubey, A. K.</creatorcontrib><creatorcontrib>Durham, M.</creatorcontrib><creatorcontrib>Durum, A.</creatorcontrib><creatorcontrib>Dutta, D.</creatorcontrib><creatorcontrib>Dzhordzhadze, V.</creatorcontrib><creatorcontrib>Edwards, S.</creatorcontrib><creatorcontrib>Efremenko, Y. V.</creatorcontrib><creatorcontrib>Ellinghaus, F.</creatorcontrib><creatorcontrib>Engelmore, T.</creatorcontrib><creatorcontrib>Enokizono, A.</creatorcontrib><creatorcontrib>En'Yo, H.</creatorcontrib><creatorcontrib>Esumi, S.</creatorcontrib><creatorcontrib>Eyser, K. O.</creatorcontrib><creatorcontrib>Fadem, B.</creatorcontrib><creatorcontrib>Fields, D. E.</creatorcontrib><creatorcontrib>Finger, M.</creatorcontrib><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Adare, A.</au><au>Afanasiev, S.</au><au>Aidala, C.</au><au>Ajitanand, N. N.</au><au>Akiba, Y.</au><au>Al-Bataineh, H.</au><au>Alexander, J.</au><au>Alho, T.</au><au>Aoki, K.</au><au>Aphecetche, Laurent</au><au>Aramaki, Y.</au><au>Asai, J.</au><au>Atomssa, E. T.</au><au>Averbeck, R.</au><au>Awes, T. C.</au><au>Azmoun, B.</au><au>Babintsev, V.</au><au>Bai, M.</au><au>Baksay, G.</au><au>Baksay, L.</au><au>Baldisseri, A.</au><au>Barish, K. N.</au><au>Barnes, P. D.</au><au>Bassalleck, B.</au><au>Basye, A. T.</au><au>Bathe, S.</au><au>Batsouli, S.</au><au>Baublis, V.</au><au>Baumann, Cédric</au><au>Bazilevsky, A.</au><au>Belikov, S.</au><au>Belmont, R.</au><au>Bennett, R.</au><au>Berdnikov, A.</au><au>Berdnikov, Y.</au><au>Bickley, A. A.</au><au>Boissevain, J. G.</au><au>Bok, J. S.</au><au>Borel, H.</au><au>Boyle, K.</au><au>Brooks, M. L.</au><au>Buesching, H.</au><au>Bumazhnov, V.</au><au>Bunce, G.</au><au>Butsyk, S.</au><au>Muñoz Camacho, C.</au><au>Campbell, S.</au><au>Chang, B. S.</au><au>Chang, W. C.</au><au>Charvet, J. -L.</au><au>Chen, C. -H.</au><au>Chernichenko, S.</au><au>Chi, C. Y.</au><au>Chiu, M.</au><au>Choi, I. J.</au><au>Choudhury, R. K.</au><au>Christiansen, P.</au><au>Chujo, T.</au><au>Chung, P.</au><au>Churyn, A.</au><au>Chvala, O.</au><au>Cianciolo, V.</au><au>Citron, Z.</au><au>Cole, B. A.</au><au>Connors, M.</au><au>Constantin, P.</au><au>Csanád, M.</au><au>Csörgő, T.</au><au>Dahms, T.</au><au>Dairaku, S.</au><au>Danchev, I.</au><au>Das, K.</au><au>Datta, A.</au><au>David, G.</au><au>Denisov, A.</au><au>d'Enterria, D.</au><au>Deshpande, A.</au><au>Desmond, E. J.</au><au>Dietzsch, O.</au><au>Dion, A.</au><au>Donadelli, M.</au><au>Drapier, O.</au><au>Drees, A.</au><au>Drees, K. A.</au><au>Dubey, A. K.</au><au>Durham, M.</au><au>Durum, A.</au><au>Dutta, D.</au><au>Dzhordzhadze, V.</au><au>Edwards, S.</au><au>Efremenko, Y. V.</au><au>Ellinghaus, F.</au><au>Engelmore, T.</au><au>Enokizono, A.</au><au>En'Yo, H.</au><au>Esumi, S.</au><au>Eyser, K. O.</au><au>Fadem, B.</au><au>Fields, D. E.</au><au>Finger, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions</atitle><jtitle>Physical review letters</jtitle><date>2010</date><risdate>2010</risdate><volume>104</volume><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>Fast parton probes produced by hard scattering and embedded within collisions of large nuclei have shown that partons suffer large energy loss and that the produced medium may respond collectively to the lost energy. We present measurements of neutral pion trigger particles at transverse momenta p^t_T = 4-12 GeV/c and associated charged hadrons (p^a_T = 0.5-7 GeV/c) as a function of relative azimuthal angle Delta Phi at midrapidity in Au+Au and p+p collisions at sqrt(s_NN) = 200 GeV. These data lead to two major observations. First, the relative angular distribution of low momentum hadrons, whose shape modification has been interpreted as a medium response to parton energy loss, is found to be modified only for p^t_T < 7 GeV/c. At higher p^t_T, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p^a_T. This observation presents a quantitative challenge to medium response scenarios. Second, the associated yield of hadrons opposite to the trigger particle in Au+Au relative to that in p+p (I_AA) is found to be suppressed at large momentum (IAA ~ 0.35-0.5), but less than the single particle nuclear modification factor (R_AA ~0.2).</abstract><pub>American Physical Society</pub><doi>10.1103/PhysRevLett.104.252301</doi><orcidid>https://orcid.org/0000-0002-4202-3740</orcidid><orcidid>https://orcid.org/0000-0003-3701-8119</orcidid><orcidid>https://orcid.org/0000-0001-7662-3878</orcidid><orcidid>https://orcid.org/0000-0003-0866-7523</orcidid><orcidid>https://orcid.org/0000-0002-1275-7292</orcidid><orcidid>https://orcid.org/0000-0002-4202-3740</orcidid><orcidid>https://orcid.org/0000-0001-7662-3878</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2010, Vol.104 |
| issn | 0031-9007 1079-7114 |
| language | eng |
| recordid | cdi_hal_primary_oai_HAL_in2p3_00497570v1 |
| source | American Physical Society Journals |
| subjects | Nuclear Experiment Physics |
| title | Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions |
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