Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV

S. Acharya; D. Adamova; J Adolfsson; MM. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; S.U. Ahn; S. Aiola; A. Akindinov; M. Al-Turany; SN Alam; DSD Albuquerque; D. Aleksandrov; B Alessandro; Rafael A. Molina; Yusuf Ali; A. Alici; C. Andrei; Ian Bearden; Christian Alexander Bourjau; Ante Bilandzic; Ozelin De Lima Pimentel Lais; Jens Jørgen Gaardhøje; Marek Chojnacki; bsm989 bsm989; Freja Thoresen; Børge Svane Nielsen; Vojtech Pacik; You Zhou; Vytautas Vislavicius; Katarina Gajdosova; rtc312 rtc312

doi:10.1016/j.physletb.2018.03.010

Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV

S. Acharya, D. Adamova, J Adolfsson, MM. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, S. Aiola, A. Akindinov, M. Al-Turany, SN Alam, DSD Albuquerque, D. Aleksandrov, B Alessandro, Rafael A. Molina, Yusuf Ali, A. Alici, C. AndreiIan Bearden, Christian Alexander Bourjau, Ante Bilandzic, Ozelin De Lima Pimentel Lais, Jens Jørgen Gaardhøje, Marek Chojnacki, bsm989 bsm989, Freja Thoresen, Børge Svane Nielsen, Vojtech Pacik, You Zhou, Vytautas Vislavicius, Katarina Gajdosova, rtc312 rtc312

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Abstract

The production of Z⁰ bosons at large rapidities in Pb–Pb collisions at s_NN=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 p_T>20GeV/c. The invariant yield and the nuclear modification factor, R_AA, 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.)±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.

Originalsprog	Engelsk
Tidsskrift	Physics Letters B
Vol/bind	780
Sider (fra-til)	372-383
Antal sider	12
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2018.03.010
Status	Udgivet - 10 maj 2018

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10.1016/j.physletb.2018.03.010Licens: CC BY

1-s2.0-S0370269318301977-mainForlagets udgivne version, 690 KBLicens: CC BY

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Acharya, S., Adamova, D., Adolfsson, J., Aggarwal, MM., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S. U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Molina, R. A., Ali, Y., Alici, A., ... rtc312, R. (2018). Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV. Physics Letters B, 780, 372-383. https://doi.org/10.1016/j.physletb.2018.03.010

Acharya, S, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU, Aiola, S, Akindinov, A, Al-Turany, M, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Molina, RA, Ali, Y, Alici, A, Andrei, C, Bearden, I, Bourjau, CA, Bilandzic, A, Lais, ODLP, Gaardhøje, JJ, Chojnacki, M, bsm989, B, Thoresen, F, Nielsen, BS, Pacik, V, Zhou, Y, Vislavicius, V, Gajdosova, K & rtc312, R 2018, 'Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV', Physics Letters B, bind 780, s. 372-383. https://doi.org/10.1016/j.physletb.2018.03.010

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title = "Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV",

abstract = "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.",

author = "S. Acharya and D. Adamova and J Adolfsson and MM. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and S.U. Ahn and S. Aiola and A. Akindinov and M. Al-Turany and SN Alam and DSD Albuquerque and D. Aleksandrov and B Alessandro and Molina, {Rafael A.} and Yusuf Ali and A. Alici and C. Andrei and Ian Bearden and Bourjau, {Christian Alexander} and Ante Bilandzic and Lais, {Ozelin De Lima Pimentel} and Gaardh{\o}je, {Jens J{\o}rgen} and Marek Chojnacki and bsm989 bsm989 and Freja Thoresen and Nielsen, {B{\o}rge Svane} and Vojtech Pacik and You Zhou and Vytautas Vislavicius and Katarina Gajdosova and rtc312 rtc312",

year = "2018",

month = may,

day = "10",

doi = "10.1016/j.physletb.2018.03.010",

language = "English",

volume = "780",

pages = "372--383",

journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",

issn = "0370-2693",

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TY - JOUR

T1 - Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV

AU - Acharya, S.

AU - Adamova, D.

AU - Adolfsson, J

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S.U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B

AU - Molina, Rafael A.

AU - Ali, Yusuf

AU - Alici, A.

AU - Andrei, C.

AU - Bearden, Ian

AU - Bourjau, Christian Alexander

AU - Bilandzic, Ante

AU - Lais, Ozelin De Lima Pimentel

AU - Gaardhøje, Jens Jørgen

AU - Chojnacki, Marek

AU - bsm989, bsm989

AU - Thoresen, Freja

AU - Nielsen, Børge Svane

AU - Pacik, Vojtech

AU - Zhou, You

AU - Vislavicius, Vytautas

AU - Gajdosova, Katarina

AU - rtc312, rtc312

PY - 2018/5/10

Y1 - 2018/5/10

N2 - 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.

AB - 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.

U2 - 10.1016/j.physletb.2018.03.010

DO - 10.1016/j.physletb.2018.03.010

M3 - Journal article

SN - 0370-2693

VL - 780

SP - 372

EP - 383

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

ER -

Measurement of Z(0)-boson production at large rapidities in Pb-Pb collisions at root s(NN)=5.02 TeV

Abstract

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