Measurement of charged hadron production in Z-tagged jets in proton-proton collisions at √s = 8 TeV

LHCb Collaboration; William Barter; Peter Clarke; Robert Currie; Stephan Eisenhardt; Silvia Gambetta; Franz Muheim; Matthew Needham; Marco Pappagallo; Mark Williams

doi:10.1103/PhysRevLett.123.232001

Measurement of charged hadron production in Z-tagged jets in proton-proton collisions at √s = 8 TeV

LHCb Collaboration, William Barter, Peter Clarke, Robert Currie, Stephan Eisenhardt, Silvia Gambetta, Franz Muheim, Matthew Needham, Marco Pappagallo, Mark Williams

School of Physics and Astronomy

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

Abstract

The production of charged hadrons within jets recoiling against a Z boson is measured in proton-proton collision data at √s=8 TeV recorded by the LHCb experiment. The charged-hadron structure of the jet is studied longitudinally and transverse to the jet axis for jets with transverse momentum pT>20 GeV and in the pseudorapidity range 2.5<η<4. These are the first measurements of jet hadronization at these forward rapidities and also the first where the jet is produced in association with a Z boson. In contrast to previous hadronization measurements at the Large Hadron Collider, which are dominated by gluon jets, these measurements probe predominantly light-quark jets which are found to be more longitudinally and transversely collimated with respect to the jet axis when compared to the previous gluon dominated measurements. Therefore, these results provide valuable information on differences between quarks and gluons regarding nonperturbative hadronization dynamics.

Original language	English
Article number	232001
Pages (from-to)	1-11
Number of pages	11
Journal	Physical Review Letters
Volume	123
Issue number	23
Early online date	4 Dec 2019
DOIs	https://doi.org/10.1103/PhysRevLett.123.232001
Publication status	Published - 6 Dec 2019

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@article{86b9675b03644d78af0dd54c90186bdd,

title = "Measurement of charged hadron production in Z-tagged jets in proton-proton collisions at √s = 8 TeV",

abstract = "The production of charged hadrons within jets recoiling against a Z boson is measured in proton-proton collision data at √s=8 TeV recorded by the LHCb experiment. The charged-hadron structure of the jet is studied longitudinally and transverse to the jet axis for jets with transverse momentum pT>20 GeV and in the pseudorapidity range 2.5<η<4. These are the first measurements of jet hadronization at these forward rapidities and also the first where the jet is produced in association with a Z boson. In contrast to previous hadronization measurements at the Large Hadron Collider, which are dominated by gluon jets, these measurements probe predominantly light-quark jets which are found to be more longitudinally and transversely collimated with respect to the jet axis when compared to the previous gluon dominated measurements. Therefore, these results provide valuable information on differences between quarks and gluons regarding nonperturbative hadronization dynamics.",

author = "LHCb Collaboration and William Barter and Peter Clarke and Robert Currie and Stephan Eisenhardt and Silvia Gambetta and Franz Muheim and Matthew Needham and Marco Pappagallo and Mark Williams",

note = "Acceptance date not found on publisher site but needed in order to add gold 'exception'. Used date revised.",

year = "2019",

month = dec,

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doi = "10.1103/PhysRevLett.123.232001",

language = "English",

volume = "123",

pages = "1--11",

journal = "Physical Review Letters",

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T1 - Measurement of charged hadron production in Z-tagged jets in proton-proton collisions at √s = 8 TeV

AU - Collaboration, LHCb

AU - Barter, William

AU - Clarke, Peter

AU - Currie, Robert

AU - Eisenhardt, Stephan

AU - Gambetta, Silvia

AU - Muheim, Franz

AU - Needham, Matthew

AU - Pappagallo, Marco

AU - Williams, Mark

N1 - Acceptance date not found on publisher site but needed in order to add gold 'exception'. Used date revised.

PY - 2019/12/6

Y1 - 2019/12/6

N2 - The production of charged hadrons within jets recoiling against a Z boson is measured in proton-proton collision data at √s=8 TeV recorded by the LHCb experiment. The charged-hadron structure of the jet is studied longitudinally and transverse to the jet axis for jets with transverse momentum pT>20 GeV and in the pseudorapidity range 2.5<η<4. These are the first measurements of jet hadronization at these forward rapidities and also the first where the jet is produced in association with a Z boson. In contrast to previous hadronization measurements at the Large Hadron Collider, which are dominated by gluon jets, these measurements probe predominantly light-quark jets which are found to be more longitudinally and transversely collimated with respect to the jet axis when compared to the previous gluon dominated measurements. Therefore, these results provide valuable information on differences between quarks and gluons regarding nonperturbative hadronization dynamics.

AB - The production of charged hadrons within jets recoiling against a Z boson is measured in proton-proton collision data at √s=8 TeV recorded by the LHCb experiment. The charged-hadron structure of the jet is studied longitudinally and transverse to the jet axis for jets with transverse momentum pT>20 GeV and in the pseudorapidity range 2.5<η<4. These are the first measurements of jet hadronization at these forward rapidities and also the first where the jet is produced in association with a Z boson. In contrast to previous hadronization measurements at the Large Hadron Collider, which are dominated by gluon jets, these measurements probe predominantly light-quark jets which are found to be more longitudinally and transversely collimated with respect to the jet axis when compared to the previous gluon dominated measurements. Therefore, these results provide valuable information on differences between quarks and gluons regarding nonperturbative hadronization dynamics.

U2 - 10.1103/PhysRevLett.123.232001

DO - 10.1103/PhysRevLett.123.232001

M3 - Article

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SP - 1

EP - 11

JO - Physical Review Letters

JF - Physical Review Letters

IS - 23

M1 - 232001

ER -

Measurement of charged hadron production in Z-tagged jets in proton-proton collisions at √s = 8 TeV

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