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Adare A, Afanasiev S, Aidala C, et al. Observation of direct-photon collective flow in Au + Au collisions at √s(NN)] = 200 GeV. Phys Rev Lett. 2012;109(12):122302doi: 10.1103/PhysRevLett.109.122302.
Adare, A., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Bataineh, H., Alexander, J., Aoki, K., Aramaki, Y., Atomssa, E. T., Averbeck, R., Awes, T. C., Azmoun, B., Babintsev, V., Bai, M., Baksay, G., Baksay, L., Barish, K. N., Bassalleck, B., Basye, A. T., Bathe, S., Baublis, V., Baumann, C., Bazilevsky, A., Belikov, S., Belmont, R., Bennett, R., Berdnikov, A., Berdnikov, Y., Bickley, A. A., Bok, J. S., Boyle, K., Brooks, M. L., Buesching, H., Bumazhnov, V., Bunce, G., Butsyk, S., Camacho, C. M., Campbell, S., Chen, C. H., Chi, C. Y., Chiu, M., Choi, I. J., Choudhury, R. K., Christiansen, P., Chujo, T., Chung, P., 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., Deshpande, A., Desmond, E. J., Dietzsch, O., Dion, A., Donadelli, M., Drapier, O., Drees, A., Drees, K. A., Durham, J. M., Durum, A., Dutta, D., Edwards, S., Efremenko, Y. V., Ellinghaus, F., Engelmore, T., Enokizono, A., En'yo, H., Esumi, S., Fadem, B., Fields, D. E., Finger, M., Finger, M., Fleuret, F., Fokin, S. L., Fraenkel, Z., Frantz, J. E., Franz, A., Frawley, A. D., Fujiwara, K., Fukao, Y., Fusayasu, T., Garishvili, I., Glenn, A., Gong, H., Gonin, M., Goto, Y., Granier de Cassagnac, R., Grau, N., Greene, S. V., Grosse Perdekamp, M., Gunji, T., Gustafsson, H. �. �., Haggerty, J. S., Hahn, K. I., Hamagaki, H., Hamblen, J., Han, R., Hanks, J., Hartouni, E. P., Haslum, E., Hayano, R., He, X., Heffner, M., Hemmick, T. K., Hester, T., Hill, J. C., Hohlmann, M., Holzmann, W., Homma, K., Hong, B., Horaguchi, T., Hornback, D., Huang, S., Ichihara, T., Ichimiya, R., Ide, J., Ikeda, Y., Imai, K., Inaba, M., Isenhower, D., Ishihara, M., Isobe, T., Issah, M., Isupov, A., Ivanischev, D., Jacak, B. V., Jia, J., Jin, J., Johnson, B. M., Joo, K. S., Jouan, D., Jumper, D. S., Kajihara, F., Kametani, S., Kamihara, N., Kamin, J., Kang, J. H., Kapustinsky, J., Karatsu, K., Kawall, D., Kawashima, M., Kazantsev, A. V., Kempel, T., Khanzadeev, A., Kijima, K. M., Kim, B. I., Kim, D. H., Kim, D. J., Kim, E., Kim, E. J., Kim, S. H., Kim, Y. J., Kinney, E., Kiriluk, K., Kiss, A., Kistenev, E., Klein-Boesing, C., Kochenda, L., Komkov, B., Konno, M., Koster, J., Kotchetkov, D., Kozlov, A., Král, A., Kravitz, A., Kunde, G. J., Kurita, K., Kurosawa, M., Kwon, Y., Kyle, G. S., Lacey, R., Lai, Y. S., Lajoie, J. G., Lebedev, A., Lee, D. M., Lee, J., Lee, K., Lee, K. B., Lee, K. S., Leitch, M. J., Leite, M. A., Leitner, E., Lenzi, B., Li, X., Liebing, P., Linden Levy, L. A., Liška, T., Litvinenko, A., Liu, H., Liu, M. X., Love, B., Luechtenborg, R., Lynch, D., Maguire, C. F., Makdisi, Y. I., Malakhov, A., Malik, M. D., Manko, V. I., Mannel, E., Mao, Y., Masui, H., Matathias, F., McCumber, M., McGaughey, P. L., Means, N., Meredith, B., Miake, Y., Mignerey, A. C., Mikeš, P., Miki, K., Milov, A., Mishra, M., Mitchell, J. T., Mohanty, A. K., Morino, Y., Morreale, A., Morrison, D. P., Moukhanova, T. V., Murata, J., Nagamiya, S., Nagle, J. L., Naglis, M., Nagy, M. I., Nakagawa, I., Nakamiya, Y., Nakamura, T., Nakano, K., Newby, J., Nguyen, M., Nouicer, R., Nyanin, A. S., O'Brien, E., Oda, S. X., Ogilvie, C. A., Oka, M., Okada, K., Onuki, Y., Oskarsson, A., Ouchida, M., Ozawa, K., Pak, R., Pantuev, V., Papavassiliou, V., Park, I. H., Park, J., Park, S. K., Park, W. J., Pate, S. F., Pei, H., Peng, J. C., Pereira, H., Peresedov, V., Peressounko, D. Y., Pinkenburg, C., Pisani, R. P., Proissl, M., Purschke, M. L., Purwar, A. K., Qu, H., Rak, J., Rakotozafindrabe, A., Ravinovich, I., Read, K. F., Reygers, K., Riabov, V., Riabov, Y., Richardson, E., Roach, D., Roche, G., Rolnick, S. D., Rosati, M., Rosen, C. A., Rosendahl, S. S., Rosnet, P., Rukoyatkin, P., Ružička, P., Sahlmueller, B., Saito, N., Sakaguchi, T., Sakashita, K., Samsonov, V., Sano, S., Sato, T., Sawada, S., Sedgwick, K., Seele, J., Seidl, R., Semenov, A. Y., Seto, R., Sharma, D., Shein, I., Shibata, T. A., Shigaki, K., Shimomura, M., Shoji, K., Shukla, P., Sickles, A., Silva, C. L., Silvermyr, D., Silvestre, C., Sim, K. S., Singh, B. K., Singh, C. P., Singh, V., Slunečka, M., Soltz, R. A., Sondheim, W. E., Sorensen, S. P., Sourikova, I. V., Sparks, N. A., Stankus, P. W., Stenlund, E., Stoll, S. P., Sugitate, T., Sukhanov, A., Sziklai, J., Takagui, E. M., Taketani, A., Tanabe, R., Tanaka, Y., Tanida, K., Tannenbaum, M. J., Tarafdar, S., Taranenko, A., Tarján, P., Themann, H., Thomas, T. L., Togawa, M., Toia, A., Tomášek, L., Torii, H., Towell, R. S., Tserruya, I., Tsuchimoto, Y., Vale, C., Valle, H., van Hecke, H. W., Vazquez-Zambrano, E., Veicht, A., Velkovska, J., Vértesi, R., Vinogradov, A. A., Virius, M., Vrba, V., Vznuzdaev, E., Wang, X. R., Watanabe, D., Watanabe, K., Watanabe, Y., Wei, F., Wei, R., Wessels, J., White, S. N., Winter, D., Wood, J. P., Woody, C. L., Wright, R. M., Wysocki, M., Xie, W., Yamaguchi, Y. L., Yamaura, K., Yang, R., Yanovich, A., Ying, J., Yokkaichi, S., You, Z., Young, G. R., Younus, I., Yushmanov, I. E., Zajc, W. A., Zhang, C., Zhou, S., Zolin, L. (2012). Observation of direct-photon collective flow in Au + Au collisions at √s(NN)] = 200 GeV. Physical review letters, 109(12), 122302. https://doi.org/10.1103/PhysRevLett.109.122302
Adare, A, et al. "Observation of direct-photon collective flow in Au + Au collisions at √s(NN)] = 200 GeV." Physical review letters vol. 109,12 (2012): 122302. doi: https://doi.org/10.1103/PhysRevLett.109.122302
Adare A, Afanasiev S, Aidala C, Ajitanand NN, Akiba Y, Al-Bataineh H, Alexander J, Aoki K, Aramaki Y, Atomssa ET, Averbeck R, Awes TC, Azmoun B, Babintsev V, Bai M, Baksay G, Baksay L, Barish KN, Bassalleck B, Basye AT, Bathe S, Baublis V, Baumann C, Bazilevsky A, Belikov S, Belmont R, Bennett R, Berdnikov A, Berdnikov Y, Bickley AA, Bok JS, Boyle K, Brooks ML, Buesching H, Bumazhnov V, Bunce G, Butsyk S, Camacho CM, Campbell S, Chen CH, Chi CY, Chiu M, Choi IJ, Choudhury RK, Christiansen P, Chujo T, Chung P, Chvala O, Cianciolo V, Citron Z, Cole BA, Connors M, Constantin P, Csanád M, Csörgő T, Dahms T, Dairaku S, Danchev I, Das K, Datta A, David G, Denisov A, Deshpande A, Desmond EJ, Dietzsch O, Dion A, Donadelli M, Drapier O, Drees A, Drees KA, Durham JM, Durum A, Dutta D, Edwards S, Efremenko YV, Ellinghaus F, Engelmore T, Enokizono A, En'yo H, Esumi S, Fadem B, Fields DE, Finger M, Finger M, Fleuret F, Fokin SL, Fraenkel Z, Frantz JE, Franz A, Frawley AD, Fujiwara K, Fukao Y, Fusayasu T, Garishvili I, Glenn A, Gong H, Gonin M, Goto Y, Granier de Cassagnac R, Grau N, Greene SV, Grosse Perdekamp M, Gunji T, Gustafsson HÅ, Haggerty JS, Hahn KI, Hamagaki H, Hamblen J, Han R, Hanks J, Hartouni EP, Haslum E, Hayano R, He X, Heffner M, Hemmick TK, Hester T, Hill JC, Hohlmann M, Holzmann W, Homma K, Hong B, Horaguchi T, Hornback D, Huang S, Ichihara T, Ichimiya R, Ide J, Ikeda Y, Imai K, Inaba M, Isenhower D, Ishihara M, Isobe T, Issah M, Isupov A, Ivanischev D, Jacak BV, Jia J, Jin J, Johnson BM, Joo KS, Jouan D, Jumper DS, Kajihara F, Kametani S, Kamihara N, Kamin J, Kang JH, Kapustinsky J, Karatsu K, Kawall D, Kawashima M, Kazantsev AV, Kempel T, Khanzadeev A, Kijima KM, Kim BI, Kim DH, Kim DJ, Kim E, Kim EJ, Kim SH, Kim YJ, Kinney E, Kiriluk K, Kiss A, Kistenev E, Klein-Boesing C, Kochenda L, Komkov B, Konno M, Koster J, Kotchetkov D, Kozlov A, Král A, Kravitz A, Kunde GJ, Kurita K, Kurosawa M, Kwon Y, Kyle GS, Lacey R, Lai YS, Lajoie JG, Lebedev A, Lee DM, Lee J, Lee K, Lee KB, Lee KS, Leitch MJ, Leite MA, Leitner E, Lenzi B, Li X, Liebing P, Linden Levy LA, Liška T, Litvinenko A, Liu H, Liu MX, Love B, Luechtenborg R, Lynch D, Maguire CF, Makdisi YI, Malakhov A, Malik MD, Manko VI, Mannel E, Mao Y, Masui H, Matathias F, McCumber M, McGaughey PL, Means N, Meredith B, Miake Y, Mignerey AC, Mikeš P, Miki K, Milov A, Mishra M, Mitchell JT, Mohanty AK, Morino Y, Morreale A, Morrison DP, Moukhanova TV, Murata J, Nagamiya S, Nagle JL, Naglis M, Nagy MI, Nakagawa I, Nakamiya Y, Nakamura T, Nakano K, Newby J, Nguyen M, Nouicer R, Nyanin AS, O'Brien E, Oda SX, Ogilvie CA, Oka M, Okada K, Onuki Y, Oskarsson A, Ouchida M, Ozawa K, Pak R, Pantuev V, Papavassiliou V, Park IH, Park J, Park SK, Park WJ, Pate SF, Pei H, Peng JC, Pereira H, Peresedov V, Peressounko DY, Pinkenburg C, Pisani RP, Proissl M, Purschke ML, Purwar AK, Qu H, Rak J, Rakotozafindrabe A, Ravinovich I, Read KF, Reygers K, Riabov V, Riabov Y, Richardson E, Roach D, Roche G, Rolnick SD, Rosati M, Rosen CA, Rosendahl SS, Rosnet P, Rukoyatkin P, Ružička P, Sahlmueller B, Saito N, Sakaguchi T, Sakashita K, Samsonov V, Sano S, Sato T, Sawada S, Sedgwick K, Seele J, Seidl R, Semenov AY, Seto R, Sharma D, Shein I, Shibata TA, Shigaki K, Shimomura M, Shoji K, Shukla P, Sickles A, Silva CL, Silvermyr D, Silvestre C, Sim KS, Singh BK, Singh CP, Singh V, Slunečka M, Soltz RA, Sondheim WE, Sorensen SP, Sourikova IV, Sparks NA, Stankus PW, Stenlund E, Stoll SP, Sugitate T, Sukhanov A, Sziklai J, Takagui EM, Taketani A, Tanabe R, Tanaka Y, Tanida K, Tannenbaum MJ, Tarafdar S, Taranenko A, Tarján P, Themann H, Thomas TL, Togawa M, Toia A, Tomášek L, Torii H, Towell RS, Tserruya I, Tsuchimoto Y, Vale C, Valle H, van Hecke HW, Vazquez-Zambrano E, Veicht A, Velkovska J, Vértesi R, Vinogradov AA, Virius M, Vrba V, Vznuzdaev E, Wang XR, Watanabe D, Watanabe K, Watanabe Y, Wei F, Wei R, Wessels J, White SN, Winter D, Wood JP, Woody CL, Wright RM, Wysocki M, Xie W, Yamaguchi YL, Yamaura K, Yang R, Yanovich A, Ying J, Yokkaichi S, You Z, Young GR, Younus I, Yushmanov IE, Zajc WA, Zhang C, Zhou S, Zolin L. Observation of direct-photon collective flow in Au + Au collisions at √s(NN)] = 200 GeV. Phys Rev Lett. 2012 Sep 21;109(12):122302. doi: 10.1103/PhysRevLett.109.122302. Epub 2012 Sep 19. PMID: 23005942.
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Phys Rev Lett. 2012 Sep 21;109(12):122302. doi: 10.1103/PhysRevLett.109.122302. Epub 2012 Sep 19.

Observation of direct-photon collective flow in Au + Au collisions at √s(NN)] = 200 GeV.

Physical review letters

A Adare, S Afanasiev, C Aidala, N N Ajitanand, Y Akiba, H Al-Bataineh, J Alexander, K Aoki, Y Aramaki, E T Atomssa, R Averbeck, T C Awes, B Azmoun, V Babintsev, M Bai, G Baksay, L Baksay, K N Barish, B Bassalleck, A T Basye, S Bathe, V Baublis, C Baumann, A Bazilevsky, S Belikov, R Belmont, R Bennett, A Berdnikov, Y Berdnikov, A A Bickley, J S Bok, K Boyle, M L Brooks, H Buesching, V Bumazhnov, G Bunce, S Butsyk, C M Camacho, S Campbell, C-H Chen, C Y Chi, M Chiu, I J Choi, R K Choudhury, P Christiansen, T Chujo, P Chung, O Chvala, V Cianciolo, Z Citron, B A Cole, M Connors, P Constantin, M Csanád, T Csörgő, T Dahms, S Dairaku, I Danchev, K Das, A Datta, G David, A Denisov, A Deshpande, E J Desmond, O Dietzsch, A Dion, M Donadelli, O Drapier, A Drees, K A Drees, J M Durham, A Durum, D Dutta, S Edwards, Y V Efremenko, F Ellinghaus, T Engelmore, A Enokizono, H En'yo, S Esumi, B Fadem, D E Fields, M Finger, M Finger, F Fleuret, S L Fokin, Z Fraenkel, J E Frantz, A Franz, A D Frawley, K Fujiwara, Y Fukao, T Fusayasu, I Garishvili, A Glenn, H Gong, M Gonin, Y Goto, R Granier de Cassagnac, N Grau, S V Greene, M Grosse Perdekamp, T Gunji, H-Å Gustafsson, J S Haggerty, K I Hahn, H Hamagaki, J Hamblen, R Han, J Hanks, E P Hartouni, E Haslum, R Hayano, X He, M Heffner, T K Hemmick, T Hester, J C Hill, M Hohlmann, W Holzmann, K Homma, B Hong, T Horaguchi, D Hornback, S Huang, T Ichihara, R Ichimiya, J Ide, Y Ikeda, K Imai, M Inaba, D Isenhower, M Ishihara, T Isobe, M Issah, A Isupov, D Ivanischev, B V Jacak, J Jia, J Jin, B M Johnson, K S Joo, D Jouan, D S Jumper, F Kajihara, S Kametani, N Kamihara, J Kamin, J H Kang, J Kapustinsky, K Karatsu, D Kawall, M Kawashima, A V Kazantsev, T Kempel, A Khanzadeev, K M Kijima, B I Kim, D H Kim, D J Kim, E Kim, E J Kim, S H Kim, Y J Kim, E Kinney, K Kiriluk, A Kiss, E Kistenev, C Klein-Boesing, L Kochenda, B Komkov, M Konno, J Koster, D Kotchetkov, A Kozlov, A Král, A Kravitz, G J Kunde, K Kurita, M Kurosawa, Y Kwon, G S Kyle, R Lacey, Y S Lai, J G Lajoie, A Lebedev, D M Lee, J Lee, K Lee, K B Lee, K S Lee, M J Leitch, M A L Leite, E Leitner, B Lenzi, X Li, P Liebing, L A Linden Levy, T Liška, A Litvinenko, H Liu, M X Liu, B Love, R Luechtenborg, D Lynch, C F Maguire, Y I Makdisi, A Malakhov, M D Malik, V I Manko, E Mannel, Y Mao, H Masui, F Matathias, M McCumber, P L McGaughey, N Means, B Meredith, Y Miake, A C Mignerey, P Mikeš, K Miki, A Milov, M Mishra, J T Mitchell, A K Mohanty, Y Morino, A Morreale, D P Morrison, T V Moukhanova, J Murata, S Nagamiya, J L Nagle, M Naglis, M I Nagy, I Nakagawa, Y Nakamiya, T Nakamura, K Nakano, J Newby, M Nguyen, R Nouicer, A S Nyanin, E O'Brien, S X Oda, C A Ogilvie, M Oka, K Okada, Y Onuki, A Oskarsson, M Ouchida, K Ozawa, R Pak, V Pantuev, V Papavassiliou, I H Park, J Park, S K Park, W J Park, S F Pate, H Pei, J-C Peng, H Pereira, V Peresedov, D Yu Peressounko, C Pinkenburg, R P Pisani, M Proissl, M L Purschke, A K Purwar, H Qu, J Rak, A Rakotozafindrabe, I Ravinovich, K F Read, K Reygers, V Riabov, Y Riabov, E Richardson, D Roach, G Roche, S D Rolnick, M Rosati, C A Rosen, S S E Rosendahl, P Rosnet, P Rukoyatkin, P Ružička, B Sahlmueller, N Saito, T Sakaguchi, K Sakashita, V Samsonov, S Sano, T Sato, S Sawada, K Sedgwick, J Seele, R Seidl, A Yu Semenov, R Seto, D Sharma, I Shein, T-A Shibata, K Shigaki, M Shimomura, K Shoji, P Shukla, A Sickles, C L Silva, D Silvermyr, C Silvestre, K S Sim, B K Singh, C P Singh, V Singh, M Slunečka, R A Soltz, W E Sondheim, S P Sorensen, I V Sourikova, N A Sparks, P W Stankus, E Stenlund, S P Stoll, T Sugitate, A Sukhanov, J Sziklai, E M Takagui, A Taketani, R Tanabe, Y Tanaka, K Tanida, M J Tannenbaum, S Tarafdar, A Taranenko, P Tarján, H Themann, T L Thomas, M Togawa, A Toia, L Tomášek, H Torii, R S Towell, I Tserruya, Y Tsuchimoto, C Vale, H Valle, H W van Hecke, E Vazquez-Zambrano, A Veicht, J Velkovska, R Vértesi, A A Vinogradov, M Virius, V Vrba, E Vznuzdaev, X R Wang, D Watanabe, K Watanabe, Y Watanabe, F Wei, R Wei, J Wessels, S N White, D Winter, J P Wood, C L Woody, R M Wright, M Wysocki, W Xie, Y L Yamaguchi, K Yamaura, R Yang, A Yanovich, J Ying, S Yokkaichi, Z You, G R Young, I Younus, I E Yushmanov, W A Zajc, C Zhang, S Zhou, L Zolin,

Affiliations

  1. University of Colorado, Boulder, 80309, USA.

PMID: 23005942 DOI: 10.1103/PhysRevLett.109.122302

Abstract

The second Fourier component v(2) of the azimuthal anisotropy with respect to the reaction plane is measured for direct photons at midrapidity and transverse momentum (p(T)) of 1-12 GeV/c in Au + Au collisions at √s(NN)] = 200 GeV. Previous measurements of this quantity for hadrons with p(T) < 6 GeV/c indicate that the medium behaves like a nearly perfect fluid, while for p(T) > 6 GeV/c a reduced anisotropy is interpreted in terms of a path-length dependence for parton energy loss. In this measurement with the PHENIX detector at the Relativistic Heavy Ion Collider we find that for p(T) > 4 GeV/c the anisotropy for direct photons is consistent with zero, which is as expected if the dominant source of direct photons is initial hard scattering. However, in the p(T) < 4 GeV/c region dominated by thermal photons, we find a substantial direct-photon v(2) comparable to that of hadrons, whereas model calculations for thermal photons in this kinematic region underpredict the observed v(2).

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