The University of Southampton
University of Southampton Institutional Repository

Measurement of the Splitting Function in pp and Pb-Pb Collisions at √ sNN = 5.02 TeV

Measurement of the Splitting Function in pp and Pb-Pb Collisions at √ sNN = 5.02 TeV
Measurement of the Splitting Function in pp and Pb-Pb Collisions at √ sNN = 5.02 TeV
Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.
1079-7114
1-17
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Sirunyan, A.M. , The CMS Collaboration (2018) Measurement of the Splitting Function in pp and Pb-Pb Collisions at √ sNN = 5.02 TeV. Physical Review Letters, 120 (14), 1-17, [142302]. (doi:10.1103/PhysRevLett.120.142302).

Record type: Article

Abstract

Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.

Text
PhysRevLett.120.142302 - Version of Record
Available under License Creative Commons Attribution.
Download (620kB)

More information

e-pub ahead of print date: 3 April 2018
Published date: 6 April 2018

Identifiers

Local EPrints ID: 419640
URI: http://eprints.soton.ac.uk/id/eprint/419640
ISSN: 1079-7114
PURE UUID: ba2696e0-c995-4ec3-8ebd-70075fbb6558
ORCID for A. Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 18 Apr 2018 16:30
Last modified: 16 Mar 2024 03:55

Export record

Altmetrics

Contributors

Author: A.M. Sirunyan
Author: A. Belyaev ORCID iD
Corporate Author: The CMS Collaboration

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×