Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV

CMS Collaboration; Shimaa Abu Zeid; Freya Blekman; Jorgen D'Hondt; Isabelle Helena De Bruyn; Kevin Deroover; Steven Lowette; Seth Moortgat; Lieselotte Moreels; Quentin Python; Kirill Skovpen; Stefaan Tavernier; Walter Van Doninck; Petra Van Mulders; Isis Marina Van Parijs; Annik Olbrechts; Nadir Daci

doi:10.1103/PhysRevLett.120.142301

Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV

CMS Collaboration, Shimaa Abu Zeid, Freya Blekman, Jorgen D'Hondt, Isabelle Helena De Bruyn, Kevin Deroover, Steven Lowette, Seth Moortgat, Lieselotte Moreels, Quentin Python, Kirill Skovpen, Stefaan Tavernier, Walter Van Doninck, Petra Van Mulders, Isis Marina Van Parijs, Annik Olbrechts, Nadir Daci

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

The relative yields of Υ mesons produced in pp and PbPb collisions at √sNN = 5.02TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, Υ(2S) and Υ(3S), to the ground state, Υ(1S), in both PbPb and pp collisions at the same center-of-mass energy. The double ratios, [Υ(nS)/Υ(1S)]PbPb/[Υ(nS)/Υ(1S)]pp, are measured to be 0.308±0.055(stat)± 0.019(syst) for the Υ(2S) and less than 0.26 at 95% conﬁdence level for the Υ(3S). No signiﬁcant Υ(3S) signal is found in the PbPb data. The double ratios are studied as a function of collision centrality, as well as Υ transverse momentum and rapidity. No signiﬁcant dependencies are observed.

Original language	English
Article number	142301
Number of pages	17
Journal	Physical Review Letters
Volume	120
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.120.142301
Publication status	Published - 2 Apr 2018

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10.1103/PhysRevLett.120.142301

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CMS Collaboration, Abu Zeid, S., Blekman, F., D'Hondt, J., De Bruyn, I. H., Deroover, K., Lowette, S., Moortgat, S., Moreels, L., Python, Q., Skovpen, K., Tavernier, S., Van Doninck, W., Van Mulders, P., Van Parijs, I. M., Olbrechts, A., & Daci, N. (2018). Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV. Physical Review Letters, 120(14), [142301]. https://doi.org/10.1103/PhysRevLett.120.142301

CMS Collaboration ; Abu Zeid, Shimaa ; Blekman, Freya ; D'Hondt, Jorgen ; De Bruyn, Isabelle Helena ; Deroover, Kevin ; Lowette, Steven ; Moortgat, Seth ; Moreels, Lieselotte ; Python, Quentin ; Skovpen, Kirill ; Tavernier, Stefaan ; Van Doninck, Walter ; Van Mulders, Petra ; Van Parijs, Isis Marina ; Olbrechts, Annik ; Daci, Nadir. / Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV. In: Physical Review Letters. 2018 ; Vol. 120, No. 14.

@article{327820ce712c4d05b4603b4ca8ccd4a4,

title = "Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV",

abstract = "The relative yields of Υ mesons produced in pp and PbPb collisions at √sNN = 5.02TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, Υ(2S) and Υ(3S), to the ground state, Υ(1S), in both PbPb and pp collisions at the same center-of-mass energy. The double ratios, [Υ(nS)/Υ(1S)]PbPb/[Υ(nS)/Υ(1S)]pp, are measured to be 0.308±0.055(stat)± 0.019(syst) for the Υ(2S) and less than 0.26 at 95% conﬁdence level for the Υ(3S). No signiﬁcant Υ(3S) signal is found in the PbPb data. The double ratios are studied as a function of collision centrality, as well as Υ transverse momentum and rapidity. No signiﬁcant dependencies are observed.",

author = "{CMS Collaboration} and {Abu Zeid}, Shimaa and Freya Blekman and Jorgen D'Hondt and {De Bruyn}, {Isabelle Helena} and Kevin Deroover and Steven Lowette and Seth Moortgat and Lieselotte Moreels and Quentin Python and Kirill Skovpen and Stefaan Tavernier and {Van Doninck}, Walter and {Van Mulders}, Petra and {Van Parijs}, {Isis Marina} and Annik Olbrechts and Nadir Daci",

year = "2018",

month = apr,

day = "2",

doi = "10.1103/PhysRevLett.120.142301",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "14",

}

CMS Collaboration, Abu Zeid, S, Blekman, F , D'Hondt, J, De Bruyn, IH, Deroover, K, Lowette, S, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, IM, Olbrechts, A & Daci, N 2018, 'Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV', Physical Review Letters, vol. 120, no. 14, 142301. https://doi.org/10.1103/PhysRevLett.120.142301

Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV. / CMS Collaboration; Abu Zeid, Shimaa; Blekman, Freya ; D'Hondt, Jorgen; De Bruyn, Isabelle Helena; Deroover, Kevin; Lowette, Steven; Moortgat, Seth; Moreels, Lieselotte; Python, Quentin; Skovpen, Kirill; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Parijs, Isis Marina; Olbrechts, Annik; Daci, Nadir.

In: Physical Review Letters, Vol. 120, No. 14, 142301, 02.04.2018.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV

AU - CMS Collaboration

AU - Abu Zeid, Shimaa

AU - Blekman, Freya

AU - D'Hondt, Jorgen

AU - De Bruyn, Isabelle Helena

AU - Deroover, Kevin

AU - Lowette, Steven

AU - Moortgat, Seth

AU - Moreels, Lieselotte

AU - Python, Quentin

AU - Skovpen, Kirill

AU - Tavernier, Stefaan

AU - Van Doninck, Walter

AU - Van Mulders, Petra

AU - Van Parijs, Isis Marina

AU - Olbrechts, Annik

AU - Daci, Nadir

PY - 2018/4/2

Y1 - 2018/4/2

N2 - The relative yields of Υ mesons produced in pp and PbPb collisions at √sNN = 5.02TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, Υ(2S) and Υ(3S), to the ground state, Υ(1S), in both PbPb and pp collisions at the same center-of-mass energy. The double ratios, [Υ(nS)/Υ(1S)]PbPb/[Υ(nS)/Υ(1S)]pp, are measured to be 0.308±0.055(stat)± 0.019(syst) for the Υ(2S) and less than 0.26 at 95% conﬁdence level for the Υ(3S). No signiﬁcant Υ(3S) signal is found in the PbPb data. The double ratios are studied as a function of collision centrality, as well as Υ transverse momentum and rapidity. No signiﬁcant dependencies are observed.

AB - The relative yields of Υ mesons produced in pp and PbPb collisions at √sNN = 5.02TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, Υ(2S) and Υ(3S), to the ground state, Υ(1S), in both PbPb and pp collisions at the same center-of-mass energy. The double ratios, [Υ(nS)/Υ(1S)]PbPb/[Υ(nS)/Υ(1S)]pp, are measured to be 0.308±0.055(stat)± 0.019(syst) for the Υ(2S) and less than 0.26 at 95% conﬁdence level for the Υ(3S). No signiﬁcant Υ(3S) signal is found in the PbPb data. The double ratios are studied as a function of collision centrality, as well as Υ transverse momentum and rapidity. No signiﬁcant dependencies are observed.

UR - http://www.scopus.com/inward/record.url?scp=85045020611&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.120.142301

DO - 10.1103/PhysRevLett.120.142301

M3 - Article

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

M1 - 142301

ER -

Suppression of excited Υ states relative to the ground state in PbPb collisions at √sNN = 5.02TeV

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