Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at sNN=5.02TeV

S. Acharya, D. Adamová, J. Adolfsson, M. M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S. U. Ahn, S. Aiola, A. Akindinov, M. Al-Turany, S. N. Alam, D. S.D. Albuquerque, D. Aleksandrov, B. Alessandro, R. Alfaro Molina, Y. Ali, A. Alici, A. AlkinJ. Alme, T. Alt, L. Altenkamper, I. Altsybeev, C. Andrei, D. Andreou, H. A. Andrews, A. Andronic, M. Angeletti, V. Anguelov, C. Anson, T. Antičić, F. Antinori, P. Antonioli, N. Apadula, L. Aphecetche, H. Appelshäuser, S. Arcelli, R. Arnaldi, O. W. Arnold, I. C. Arsene, M. Arslandok, B. Audurier, A. Augustinus, G. Feofilov, V. Kondratiev, V. Kovalenko, V. Vechernin, L. Vinogradov, A. Zarochentsev

Результат исследований: Научные публикации в периодических изданияхстатья

6 Цитирования (Scopus)

Аннотация

The production of Z0 bosons at large rapidities in Pb–Pb collisions at sNN=5.02TeV is reported. Z0 candidates are reconstructed in the dimuon decay channel (Z0→μ+μ), based on muons selected with pseudo-rapidity −4.0<η<−2.5 and pT>20GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of RAA for the 0–20% central Pb–Pb collisions is 0.67±0.11(stat.)±0.03(syst.)±0.06(corr. syst.), exhibiting a deviation of 2.6σ from unity. The results are well-described by calculations that include nuclear modifications of the parton distribution functions, while the predictions using vacuum PDFs deviate from data by 2.3σ in the 0–90% centrality class and by 3σ in the 0–20% central collisions.

Язык оригиналаанглийский
Страницы (с-по)372-383
Число страниц12
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том780
DOI
СостояниеОпубликовано - 10 мая 2018

Предметные области Scopus

  • Ядерная физика и физика высоких энергий

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  • Цитировать

    Acharya, S., Adamová, D., Adolfsson, J., Aggarwal, M. M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S. U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, S. N., Albuquerque, D. S. D., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, Y., Alici, A., ... Zarochentsev, A. (2018). Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at sNN=5.02TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 780, 372-383. https://doi.org/10.1016/j.physletb.2018.03.010