@article{3185911,
    title = "Measurement of dielectron production in central Pb-Pb collisions at root
S-NN=2.76 TeV",
    author = "Acharya, S. and Acosta, F. T. and Adamova, D. and Adolfsson, J. and and Aggarwal, M. M. and Rinella, G. Aglieri and Agnello, M. and Agrawal, N. and and Ahammed, Z. and Ahn, S. U. and Aiola, S. and Akindinov, A. and and Al-Turany, M. and Alam, S. N. and Albuquerque, D. S. D. and Aleksandrov, and D. and Alessandro, B. and Alfaro Molina, R. and Ali, Y. and Alici, A. and and Alkin, A. and Alme, J. and Alt, T. and Altenkamper, L. and and Altsybeev, I and Anaam, M. N. and Andrei, C. and Andreou, D. and and Andrews, H. A. and Andronic, A. and Angeletti, M. and Anguelov, V and and Anson, C. and Anticic, T. and Antinori, F. and Antonioli, P. and Anwar, and R. and Apadula, N. and Aphecetche, L. and Appelshaeuser, H. and Arcelli, and S. and Arnaldi, R. and Arnold, O. W. and Arsene, I. C. and Arslandok, M. and and Augustinus, A. and Averbeck, R. and Azmi, M. D. and Badala, A. and and Baek, Y. W. and Bagnasco, S. and Bailhache, R. and Bala, R. and and Baldisseri, A. and Ball, M. and Baral, R. C. and Barbano, A. M. and and Barbera, R. and Barile, F. and Barioglio, L. and Barnafoldi, G. G. and and Barnby, L. S. and Barret, V and Bartalini, P. and Barth, K. and Bartsch, and E. and Bastid, N. and Basu, S. and Batigne, G. and Batyunya, B. and and Batzing, P. C. and Bazo Alba, J. L. and Bearden, I. G. and Beck, H. and and Bedda, C. and Behera, N. K. and Belikov, I and Bellini, F. and Bello and Martinez, H. and Bellwied, R. and Beltran, L. G. E. and Belyaev, V and and Bencedi, G. and Beole, S. and Bercuci, A. and Berdnikov, Y. and Berenyi, and D. and Bertens, R. A. and Berzano, D. and Betev, L. and Bhaduri, P. P. and and Bhasin, A. and Bhat, I. R. and Bhatt, H. and Bhattacharjee, B. and and Bhom, J. and Bianchi, A. and Bianchi, L. and Bianchi, N. and Bielcik, J. and and Bielcikova, J. and Bilandzic, A. and Biro, G. and Biswas, R. and and Biswas, S. and Blair, J. 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C. and Wessels, and J. P. and Westerhoff, U. and Whitehead, A. M. and Wiechula, J. and and Wikne, J. and Wilk, G. and Wilkinson, J. and Willems, G. A. and and Williams, M. C. S. and Willsher, E. and Windelband, B. and Witt, W. E. and and Xu, R. and Yalcin, S. and Yamakawa, K. and Yano, S. and Yin, Z. and and Yokoyama, H. and Yoo, I-K and Yoon, J. H. and Yurchenko, V and Zaccolo, and V and Zaman, A. and Zampolli, C. and Zanoli, H. J. C. and Zardoshti, N. and and Zarochentsev, A. and Zavada, P. and Zaviyalov, N. and Zbroszczyk, H. and and Zhalov, M. and Zhang, X. and Zhang, Y. and Zhang, Z. and Zhao, C. and and Zherebchevskii, V and Zhigareva, N. and Zhou, D. and Zhou, Y. and and Zhou, Z. and Zhu, H. and Zhu, J. and Zhu, Y. and Zichichi, A. and and Zimmermann, M. B. and Zinovjev, G. and Zmeskal, J. and Zou, S. and ALICE and Collaboration",
    journal = "Physical Review C",
    year = "2019",
    volume = "99",
    number = "2",
    publisher = "AMER PHYSICAL SOC",
    issn = "2469-9985, 2469-9993",
    doi = "10.1103/PhysRevC.99.024002",
    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 other 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."
}