Photon and neutral pion production in Au plus Au collisions at √sNN=130 GeV -: art. no. 044902

被引：19

作者：

Adams, J ^{[1
]}

Adler, C

Aggarwal, MM

Ahammed, Z

Amonett, J

Anderson, BD

Anderson, M

Arkhipkin, D

Averichev, GS

Badyal, SK

Balewski, J

Barannikova, O

Barnby, LS

Baudot, J

Bekele, S

Belaga, VV

Bellwied, R

Berger, J

Bezverkhny, BI

Bhardwaj, S

Bhaskar, P

Bhati, AK

Bichsel, H

Billmeier, A

Bland, LC

Blyth, CO

Bonner, BE

Botje, M

Boucham, A

Brandin, A

Bravar, A

Cadman, RV

Cai, XZ

Caines, H

Sánchez, MCD

Carroll, J

Castillo, J

Castro, M

Cebra, D

Chaloupka, P

Chattopadhyay, S

Chen, HF

Chen, Y

Chernenko, SP

Cherney, M

Chikanian, A

Choi, B

Christie, W

Coffin, JP

Cormier, TM

机构：

[1] Univ Birmingham, Birmingham, W Midlands, England

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

[4] Univ Calif Berkeley, Berkeley, CA 94720 USA

[5] Univ Calif Davis, Davis, CA 95616 USA

[6] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[7] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[8] Creighton Univ, Omaha, NE 68178 USA

[9] AS CR, Inst Nucl Phys, Prague, Czech Republic

[10] JINR, Lab High Energy, Dubna, Russia

[11] JINR, Particle Phys Lab, Dubna, Russia

[12] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[13] Indiana Univ, Bloomington, IN 47408 USA

[14] Inst Phys, Bhubaneswar 751005, Orissa, India

[15] Inst Rech Subatom, Strasbourg, France

[16] Univ Jammu, Jammu 180001, India

[17] Kent State Univ, Kent, OH 44242 USA

[18] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[19] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[20] Michigan State Univ, E Lansing, MI 48824 USA

[21] Moscow Engn Phys Inst, Moscow 115409, Russia

[22] CUNY City Coll, New York, NY 10031 USA

[23] NIKHEF, Amsterdam, Netherlands

[24] Ohio State Univ, Columbus, OH 43210 USA

[25] Panjab Univ, Chandigarh 160014, India

[26] Penn State Univ, University Pk, PA 16802 USA

[27] Inst High Energy Phys, Protvino, Russia

[28] Purdue Univ, W Lafayette, IN 47907 USA

[29] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[30] Rice Univ, Houston, TX 77251 USA

[31] Univ Sao Paulo, Sao Paulo, Brazil

[32] Univ Sci & Technol China, Anhui 230027, Peoples R China

[33] Shanghai Inst Nucl Res, Shanghai 201800, Peoples R China

[34] SUBATECH, Nantes, France

[35] Texas A&M, College Stn, TX 77843 USA

[36] Univ Texas, Austin, TX 78712 USA

[37] Valparaiso Univ, Valparaiso, IN 46383 USA

[38] Variable Energy Cyclotron Ctr, Kolkata 700064, W Bengal, India

[39] Warsaw Univ Technol, Warsaw, Poland

[40] Univ Washington, Seattle, WA 98195 USA

[41] Wayne State Univ, Detroit, MI 48201 USA

[42] HZNU, CCNU, Inst Particle Phys, Wuhan 430079, Peoples R China

[43] Yale Univ, New Haven, CT 06520 USA

[44] Univ Zagreb, HR-10002 Zagreb, Croatia

来源：

PHYSICAL REVIEW C | 2004年 / 70卷 / 04期

基金：

巴西圣保罗研究基金会; 英国工程与自然科学研究理事会; 中国国家自然科学基金;

关键词：

D O I：

10.1103/PhysRevC.70.044902

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We report inclusive photon measurements about midrapidity (\y\<0.5) from Au-197+Au-197 collisions at roots(NN)=130 GeV at RHIC. Photon pair conversions were reconstructed from electron and positron tracks measured with the Time Projection Chamber (TPC) of the STAR experiment. With this method, an energy resolution of DeltaE/Eapproximate to2% at 0.5 GeV has been achieved. Reconstructed photons have also been used to measure the transverse momentum (p(t)) spectra of pi(0) mesons about midrapidity (\y\<1) via the pi(0)-->gammagamma decay channel. The fractional contribution of the pi(0)-->gammagamma decay to the inclusive photon spectrum decreases by 20%+/-5% between p(t)=1.65 GeV/c and p(t)=2.4 GeV/c in the most central events, indicating that relative to pi(0)-->gammagamma decay the contribution of other photon sources is substantially increasing.

引用

页码：044902 / 1

页数：12

共 22 条

[1] Elliptic flow in Au plus Au collisions at √sNN=130 GeV [J].

Ackermann, KH ;

Adams, N ;

Adler, C ;

Ahammed, Z ;

Ahmad, S ;

Allgower, C ;

Amsbaugh, J ;

Anderson, M ;

Anderssen, E ;

Arnesen, H ;

Arnold, L ;

Averichev, GS ;

Baldwin, A ;

Balewski, J ;

Barannikova, O ;

Barnby, LS ;

Baudot, J ;

Beddo, M ;

Bekele, S ;

Belaga, VV ;

Bellwied, R ;

Bennett, S ;

Bercovitz, J ;

Berger, J ;

Betts, W ;

Bichsel, H ;

Bieser, F ;

Bland, LC ;

Bloomer, M ;

Blyth, CO ;

Boehm, J ;

Bonner, BE ;

Bonnet, D ;

Bossingham, R ;

Botlo, M ;

Boucham, A ;

Bouillo, N ;

Bouvier, S ;

Bradley, K ;

Brady, FP ;

Braithwaite, ES ;

Braithwaite, W ;

Brandin, A ;

Brown, RL ;

Brugalette, G ;

Byrd, C ;

Caines, H ;

Sánchez, MCD ;

Cardenas, A ;

Carr, L .

PHYSICAL REVIEW LETTERS, 2001, 86 (03) :402-407

[2]

Adcox K, 2002, PHYS REV LETT, V88, DOI [10.1103/PhysRevLett.88.242301, 10.1103/PhysRevLett.88.022301]

[3] Centrality dependence of π±, K±, p, and (p)over-bar production from √SNN = 130 GeV Au+Au collisions at RHIC -: art. no. 242301 [J].

Adcox, K ;

Adler, SS ;

Ajitanand, NN ;

Akiba, Y ;

Alexander, J ;

Aphecetche, L ;

Arai, Y ;

Aronson, SH ;

Averbeck, R ;

Awes, TC ;

Barish, KN ;

Barnes, PD ;

Barrette, J ;

Bassalleck, B ;

Bathe, S ;

Baublis, V ;

Bazilevsky, A ;

Belikov, S ;

Bellaiche, FG ;

Belyaev, ST ;

Bennett, MJ ;

Berdnikov, Y ;

Botelho, S ;

Brooks, ML ;

Brown, DS ;

Bruner, N ;

Bucher, D ;

Buesching, H ;

Bumazhnov, V ;

Bunce, G ;

Burward-Hoy, J ;

Butsyk, S ;

Carey, TA ;

Chand, P ;

Chang, J ;

Chang, WC ;

Chavez, LL ;

Chernichenko, S ;

Chi, CY ;

Chiba, J ;

Chiu, M ;

Choudhury, RK ;

Christ, T ;

Chujo, T ;

Chung, MS ;

Chung, P ;

Cianciolo, V ;

Cole, BA ;

D'Enterria, DG ;

David, G .

PHYSICAL REVIEW LETTERS, 2002, 88 (24)

[4]

Adler C, 2002, PHYS REV LETT, V89, DOI [10.1103/PhysRevLett.89.132301, 10.1103/PhysRevLett.89.202301]

[5] Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at √sNN=130 GeV -: art. no. 112303 [J].

Adler, C ;

Ahammed, Z ;

Allgower, C ;

Amonett, J ;

Anderson, BD ;

Anderson, M ;

Averichev, GS ;

Balewski, J ;

Barannikova, O ;

Barnby, LS ;

Baudot, J ;

Bekele, S ;

Belaga, VV ;

Bellwied, R ;

Berger, J ;

Bichsel, H ;

Bland, LC ;

Blyth, CO ;

Bonner, BE ;

Bossingham, R ;

Boucham, A ;

Brandin, A ;

Caines, H ;

Sánchez, MCD ;

Cardenas, A ;

Carroll, J ;

Castillo, J ;

Castro, M ;

Cebra, D ;

Chattopadhyay, S ;

Chen, ML ;

Chen, Y ;

Chernenko, SP ;

Cherney, M ;

Chikanian, A ;

Choi, B ;

Christie, W ;

Coffin, JP ;

Conin, L ;

Cormier, TM ;

Cramer, JG ;

Crawford, HJ ;

DeMello, M ;

Deng, WS ;

Derevschikov, AA ;

Didenko, L ;

Draper, JE ;

Dunin, VB ;

Dunlop, JC ;

Eckardt, V .

PHYSICAL REVIEW LETTERS, 2001, 87 (11) :112303-112303

[6] Observation of direct photons in central 158A GeV 208Pb+208Pb collisions [J].

Aggarwal, MM ;

Agnihotri, A ;

Ahammed, Z ;

Angelis, ALS ;

Antonenko, V ;

Arefiev, V ;

Astakhov, V ;

Avdeitchikov, V ;

Awes, TC ;

Baba, PVKS ;

Badyal, SK ;

Barlag, C ;

Bathe, S ;

Batiounia, B ;

Bernier, T ;

Bhalla, KB ;

Bhatia, VS ;

Blume, C ;

Bock, R ;

Bohne, EM ;

Böröcz, Z ;

Bucher, D ;

Buijs, A ;

Büsching, H ;

Carlen, L ;

Chalyshev, V ;

Chattopadhyay, S ;

Cherbatchev, R ;

Chujo, T ;

Claussen, A ;

Das, AC ;

Decowski, MP ;

Delagrange, H ;

Djordjadze, V ;

Donni, P ;

Doubovik, I ;

Dutt, S ;

Majumdar, MRD ;

El Chenawi, K ;

Eliseev, S ;

Enosawa, K ;

Foka, P ;

Fokin, S ;

Ganti, MS ;

Garpman, S ;

Gavrishchuk, O ;

Geurts, FJM ;

Ghosh, TK ;

Glasow, R ;

Gupta, SK .

PHYSICAL REVIEW LETTERS, 2000, 85 (17) :3595-3599

[7] Photon interferometry and size of the hot zone in relativistic heavy ion collisions [J].

Alam, JE ;

Mohanty, B ;

Roy, P ;

Sarkar, S ;

Sinha, B .

PHYSICAL REVIEW C, 2003, 67 (05) :6

[8] The STAR time projection chamber: a unique tool for studying high multiplicity events at RHIC [J].

Anderson, M ;

Berkovitz, J ;

Betts, W ;

Bossingham, R ;

Bieser, F ;

Brown, R ;

Burks, M ;

Sanchez, MCD ;

Cebra, D ;

Cherney, M ;

Chrin, J ;

Edwards, WR ;

Ghazikhanian, V ;

Greiner, D ;

Gilkes, M ;

Hardtke, D ;

Harper, G ;

Hjort, E ;

Huang, H ;

Igo, G ;

Jacobson, S ;

Keane, D ;

Klein, SR ;

Koehler, G ;

Kotchenda, L ;

Lasiuk, B ;

Lebedev, A ;

Lin, J ;

Lisa, M ;

Matis, HS ;

Nystrand, J ;

Panitkin, S ;

Reichold, D ;

Retiere, F ;

Sakrejda, I ;

Schweda, K ;

Shuman, D ;

Snellings, R ;

Stone, N ;

Stringfellow, B ;

Thomas, JH ;

Trainor, T ;

Trentalange, S ;

Wells, R ;

Whitten, C ;

Wieman, H ;

Yamamoto, E ;

Zhang, W .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 499 (2-3) :659-678

[9] Bremsstrahlung and photon production in thermal QCD [J].

Aurenche, P ;

Gelis, F ;

Zaraket, H ;

Kobes, R .

PHYSICAL REVIEW D, 1998, 58 (08)

[10]

Back BB, 2001, PHYS REV LETT, V87, DOI 10.1103/PhysRevLett.87.102303

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