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

Acharya, S.; Adamová, D.; Adolfsson, J.; Aggarwal, M. M.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Bufalino, S.; Concas, M.; Grosa, F.; Ravasenga, I

doi:10.1016/j.physletb.2018.03.010

The production of Z(0) bosons at large rapidities in Pb-Pb collisions at root s(NN) = 5.02 TeV is reported. Z(0) candidates are reconstructed in the dimuon decay channel (Z(0) -> mu(+) mu(-)), based on muons selected with pseudo-rapidity -4.0 < eta < -2.5 and p(T) > 20 GeV/c. The invariant yield and the nuclear modification factor, RAA, are presented as a function of rapidity and collision centrality. The value of R-AA for the 0-20% central Pb-Pb collisions is 0.67 +/- 0.11(stat.) +/- 0.03 (syst.) f 0.06(corr. syst.), exhibiting a deviation of 2.6 sigma 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 2.3 sigma in the 0-90% centrality class and by 3 sigma in the 0-20% central collisions.

Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at sNN=5.02TeV / Acharya, S.; Adamová, D.; Adolfsson, J.; Aggarwal, M. M.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Bufalino, S.; Concas, M.; Grosa, F.; Ravasenga, I. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 780(2018), pp. 372-383.

Titolo:	Measurement of Z0-boson production at large rapidities in Pb–Pb collisions at sNN=5.02TeV
Autori:	Acharya, S. Adamová, D. Adolfsson, J. Aggarwal, M. M. Aglieri Rinella, G. AGNELLO, MICHELANGELO Agrawal, N. BUFALINO, STEFANIA CONCAS, MATTEO GROSA, FABRIZIO RAVASENGA, IVAN mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2018
Rivista:	PHYSICS LETTERS. SECTION B
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.physletb.2018.03.010
Appare nelle tipologie:	1.1 Articolo in rivista

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