Measurement of dielectron production in central Pb-Pb collisions at root
S-NN=2.76 TeV

Acharya, S. and Acosta, F. T. and Adamova, D. and Adolfsson, J. and
Aggarwal, M. M. and Rinella, G. Aglieri and Agnello, M. and Agrawal, N.
and Ahammed, Z. and Ahn, S. U. and Aiola, S. and Akindinov, A. and
Al-Turany, M. and Alam, S. N. and Albuquerque, D. S. D. and Aleksandrov,
D. and Alessandro, B. and Alfaro Molina, R. and Ali, Y. and Alici, A.
and Alkin, A. and Alme, J. and Alt, T. and Altenkamper, L. and
Altsybeev, I and Anaam, M. N. and Andrei, C. and Andreou, D. and
Andrews, H. A. and Andronic, A. and Angeletti, M. and Anguelov, V and
Anson, C. and Anticic, T. and Antinori, F. and Antonioli, P. and Anwar,
R. and Apadula, N. and Aphecetche, L. and Appelshaeuser, H. and Arcelli,
S. and Arnaldi, R. and Arnold, O. W. and Arsene, I. C. and Arslandok, M.
and Augustinus, A. and Averbeck, R. and Azmi, M. D. and Badala, A. and
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Baldisseri, A. and Ball, M. and Baral, R. C. and Barbano, A. M. and
Barbera, R. and Barile, F. and Barioglio, L. and Barnafoldi, G. G. and
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Batzing, P. C. and Bazo Alba, J. L. and Bearden, I. G. and Beck, H. and
Bedda, C. and Behera, N. K. and Belikov, I and Bellini, F. and Bello
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D. and Bertens, R. A. and Berzano, D. and Betev, L. and Bhaduri, P. P.
and Bhasin, A. and Bhat, I. R. and Bhatt, H. and Bhattacharjee, B. and
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Botta, E. and Bourjau, C. and Bratrud, L. and Braun-Munzinger, P. and
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and Caliva, A. and Calvo Villar, E. and Camacho, R. S. and Camerini, P.
and Capon, A. A. and Carena, F. and Carena, W. and Carnesecchi, F. and
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Ceballos Sanchez, C. and Chandra, S. and Chang, B. and Chang, W. and
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Colamaria, F. and Colella, D. and Collu, A. and Colocci, M. and Concas,
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A. and Delsanto, S. and Deplano, C. and Dhankher, P. and Di Bari, D. and
Di Mauro, A. and Di Ruzza, B. and Diaz, R. A. and Dietel, T. and
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Doremalen, L. V. R. and Dubey, A. K. and Dubla, A. and Ducroux, L. and
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Ehlers, R. J. and Elia, D. and Endress, E. and Engel, H. and Epple, E.
and Erazmus, B. and Erhardt, F. and Ersdal, M. R. and Espagnon, B. and
Eulisse, G. and Eum, J. and Evans, D. and Evdokimov, S. and Fabbietti,
L. and Faggin, M. and Faivre, J. and Fantoni, A. and Fasel, M. and
Feldkamp, L. and Feliciello, A. and Feofilov, G. and Fernndez Tellez, A.
and Ferretti, A. and Festanti, A. and Feuillard, V. J. G. and Figiel, J.
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F. M. and Fiorenza, G. and Flor, F. and Floris, M. and Foertsch, S. and
Foka, P. and Fokin, S. and Fragiacomo, E. and Francescon, A. and
Francisco, A. and Frankenfeld, U. and Fronze, G. G. and Fuchs, U. and
Furget, C. and Furs, A. and Girard, M. Fusco and Gaardhoje, J. J. and
Gagliardi, M. and Gago, A. M. and Gajdosova, K. and Gallio, M. and
Galvan, C. D. and Ganoti, P. and Garabatos, C. and Garcia-Solis, E. and
Garg, K. and Gargiulo, C. and Gasik, P. and Gauger, E. F. and Gay
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K. and Gianotti, P. and Giubellino, P. and Giubilato, P. and Glaessel,
P. and Gomz Coral, D. M. and Ramirez, A. Gomez and Gonzalez, V and
Gonzalez-Zamora, P. and Gorbunov, S. and Gorlich, L. and Gotovac, S. and
Grabski, V and Graczykowski, L. K. and Graham, K. L. and Greiner, L. and
Grelli, A. and Grigoras, C. and Grigoriev, V and Grigoryan, A. and
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J. F. and Grosso, R. and Guernane, R. and Guerzoni, B. and Guittiere, M.
and Gulbrandsen, K. and Gunji, T. and Gupta, A. and Gupta, R. and
Guzman, I. B. and Haake, R. and Habib, M. K. and Hadjidakis, C. and
Hamagaki, H. and Hamar, G. and Hamid, M. and Hamon, J. C. and Hannigan,
R. and Haque, M. R. and Harlenderova, A. and Harris, J. W. and Harton,
A. and Hassan, H. and Hatzifotiadou, D. and Hayashi, S. and Heckel, S.
T. and Hellbaer, E. and Helstrup, H. and Herghelegiu, A. and Hernandez,
E. G. and Herrera Corral, G. and Herrmann, F. and Hetland, K. F. and
Hilden, T. E. and Hillemanns, H. and Hills, C. and Hippolyte, B. and
Hohlweger, B. and Horak, D. and Hornung, S. and Hosokawa, R. and Hota,
J. and Hristov, P. and Huang, C. and Hughes, C. and Huhn, P. and
Humanic, T. J. and Hushnud, H. and Hussain, N. and Hussain, T. and
Hutter, D. and Hwang, D. S. and Iddon, J. P. and Iga Buitron, S. A. and
Ilkaev, R. and Inaba, M. and Ippolitov, M. and Islam, M. S. and Ivanov,
M. and Ivanov, V and Izucheev, V and Jacak, B. and Jacazio, N. and
Jacobs, P. M. and Jadhav, M. B. and Jadlovska, S. and Jadlovsky, J. and
Jaelani, S. and Jahnke, C. and Jakubowska, M. J. and Janik, M. A. and
Jena, C. and Jercic, M. and Jevons, O. and Bustamante, R. T. Jimenez and
Jin, M. and Jones, P. G. and Jusko, A. and Kalinak, P. and Kalweit, A.
and Kang, J. H. and Kaplin, V and Kar, S. and Uysal, A. Karasu and
Karavichev, O. and Karavicheva, T. and Karczmarczyk, P. and Karpechev,
E. and Kebschull, U. and Keidel, R. and Keijdener, D. L. D. and Keil, M.
and Ketzer, B. and Khabanova, Z. and Khan, A. M. and Khan, S. and Khan,
S. A. and Khanzadeev, A. and Kharlov, Y. and Khatun, A. and Khuntia, A.
and Kielbowicz, M. M. and Kileng, B. and Kim, B. and Kim, D. and Kim, D.
J. and Kim, E. J. and Kim, H. and Kim, J. S. and Kim, J. and Kim, M. and
Kim, S. and Kim, T. and Kirsch, S. and Kisel, I and Kiselev, S. and
Kisiel, A. and Klay, J. L. and Klein, C. and Klein, J. and
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Knospe, A. G. and Kobdaj, C. and Kofarago, M. and Koehler, M. K. and
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and Kovalenko, V and Kowalski, M. and Kralik, I and Kravcakova, A. and
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Maevskaya, A. and Mager, M. and Mahmood, S. M. and Maire, A. and Majka,
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and Matuoka, P. F. T. and Matyja, A. and Mayer, C. and Mazzilli, M. and
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and Zherebchevskii, V and Zhigareva, N. and Zhou, D. and Zhou, Y. and
Zhou, Z. and Zhu, H. and Zhu, J. and Zhu, Y. and Zichichi, A. and
Zimmermann, M. B. and Zinovjev, G. and Zmeskal, J. and Zou, S. and ALICE
Collaboration

Acharya, S. and Acosta, F. T. and Adamova, D. and Adolfsson, J. and Aggarwal, M. M. and Rinella, G. Aglieri and Agnello, M. and Agrawal, N. and Ahammed, Z. and Ahn, S. U. and Aiola, S. and Akindinov, A. and Al-Turany, M. and Alam, S. N. and Albuquerque, D. S. D. and Aleksandrov, D. and Alessandro, B. and Alfaro Molina, R. and Ali, Y. and Alici, A. and Alkin, A. and Alme, J. and Alt, T. and Altenkamper, L. and Altsybeev, I and Anaam, M. N. and Andrei, C. and Andreou, D. and Andrews, H. A. and Andronic, A. and Angeletti, M. and Anguelov, V and Anson, C. and Anticic, T. and Antinori, F. and Antonioli, P. and Anwar, R. and Apadula, N. and Aphecetche, L. and Appelshaeuser, H. and Arcelli, S. and Arnaldi, R. and Arnold, O. W. and Arsene, I. C. and Arslandok, M. and Augustinus, A. and Averbeck, R. and Azmi, M. D. and Badala, A. and Baek, Y. W. and Bagnasco, S. and Bailhache, R. and Bala, R. and Baldisseri, A. and Ball, M. and Baral, R. C. and Barbano, A. 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A. and Volpe, G. and von Haller, B. and Vorobyev, I and Voscek, D. and Vranic, D. and Vrlakova, J. and Wagner, B. and Wang, H. and Wang, M. and Watanabe, Y. and Weber, M. and Weber, S. G. and Wegrzynek, A. and Weiser, D. F. and Wenzel, S. C. and Wessels, J. P. and Westerhoff, U. and Whitehead, A. M. and Wiechula, J. and Wikne, J. and Wilk, G. and Wilkinson, J. and Willems, G. A. and Williams, M. C. S. and Willsher, E. and Windelband, B. and Witt, W. E. and Xu, R. and Yalcin, S. and Yamakawa, K. and Yano, S. and Yin, Z. and Yokoyama, H. and Yoo, I-K and Yoon, J. H. and Yurchenko, V and Zaccolo, V and Zaman, A. and Zampolli, C. and Zanoli, H. J. C. and Zardoshti, N. and Zarochentsev, A. and Zavada, P. and Zaviyalov, N. and Zbroszczyk, H. and Zhalov, M. and Zhang, X. and Zhang, Y. and Zhang, Z. and Zhao, C. and Zherebchevskii, V and Zhigareva, N. and Zhou, D. and Zhou, Y. and Zhou, Z. and Zhu, H. and Zhu, J. and Zhu, Y. and Zichichi, A. and Zimmermann, M. B. and Zinovjev, G. and Zmeskal, J. and Zou, S. and ALICE Collaboration... Show more Show less

Date

2019

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http://hdl.handle.net/20.500.12498/4435

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Abstract

The first measurement of dielectron (e(+)e(-)) production in central (0-10\%) Pb-Pb collisions at root S-NN = 2.76 TeV at the LHC is presented. The dielectron invariant-mass spectrum is compared to the expected contributions from hadron decays in the invariant-mass range 0 < m(ee) < 3.5 GeV/c(2). The ratio of data and the cocktail of hadronic contributions without vacuum rho(0) is measured in the invariant-mass range 0.15 < m(ee) < 0.7 GeV/c(2), where an excess of dielectrons is observed in otheer experiments, and its value is 1.40 +/- 0.28 (stat.) +/- 0.08 (syst.) +/- 0.27 (cocktail). The dielectron spectrum measured in the invariant mass range 0 < m(ee) < 1 GeV/c(2) is consistent with the predictions from two theoretical model calculations that include thermal dielectron production from both partonic and hadronic phases with in-medium broadened rho(0) meson. The fraction of direct virtual photons over inclusive virtual photons is extracted for dielectron pairs with invariant mass 0.1 < m(ee) < 0.3 GeV/c(2) and in the transverse-momentum intervals 1 <( )p(T,ee) < 2 GeV/c and 2 < p(T,ee) < 4 GeV/c. The measured fraction of virtual direct photons is consistent with the measurement of real direct photons by ALICE and with the expectations from previous dielectron measurements at RHIC within the experimental uncertainties.... Show more Show less

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WoS İndeksli Yayınlar Koleksiyonu [274]