The University of Southampton
University of Southampton Institutional Repository

Measurement of the Λb polarization and angular parameters in Λb → J/ψΛ decays from pp collisions at √s = 7 and 8 TeV

Measurement of the Λb polarization and angular parameters in Λb → J/ψΛ decays from pp collisions at √s = 7 and 8 TeV
Measurement of the Λb polarization and angular parameters in Λb → J/ψΛ decays from pp collisions at √s = 7 and 8 TeV
An analysis of the bottom baryon decay ΛbJ/ψ(→μ+μ)Λ(→) is performed to measure the Λb polarization and three angular parameters in data from pp collisions at √s=7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be 0.00±0.06(stat)±0.06(syst) and the parity-violating asymmetry parameter is determined to be 0.14±0.14(stat)±0.10(syst). The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics.
1550-7998
1-20
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, Alexander , The CMS Collaboration (2018) Measurement of the Λb polarization and angular parameters in Λb → J/ψΛ decays from pp collisions at √s = 7 and 8 TeV. Physical Review D, 97 (7), 1-20, [072010]. (doi:10.1103/PhysRevD.97.072010).

Record type: Article

Abstract

An analysis of the bottom baryon decay ΛbJ/ψ(→μ+μ)Λ(→) is performed to measure the Λb polarization and three angular parameters in data from pp collisions at √s=7 and 8 TeV, collected by the CMS experiment at the Large Hadron Collider. The Λb polarization is measured to be 0.00±0.06(stat)±0.06(syst) and the parity-violating asymmetry parameter is determined to be 0.14±0.14(stat)±0.10(syst). The measurements are compared to various theoretical predictions, including those from perturbative quantum chromodynamics.

Text
PhysRevD.97.072010 - Version of Record
Available under License Creative Commons Attribution.
Download (562kB)

More information

Accepted/In Press date: 13 February 2018
e-pub ahead of print date: 17 April 2018
Published date: April 2018

Identifiers

Local EPrints ID: 421309
URI: http://eprints.soton.ac.uk/id/eprint/421309
ISSN: 1550-7998
PURE UUID: 2ec2bc7f-7773-4364-892e-75e4d3e36b36
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 01 Jun 2018 16:30
Last modified: 17 Dec 2019 01:44

Export record

Altmetrics

Contributors

University divisions

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.

×