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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 Λb→J/ψ(→μ+μ−)Λ(→pπ−) 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

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 Λb→J/ψ(→μ+μ−)Λ(→pπ−) 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.

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PhysRevD.97.072010 - Version of Record
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Accepted/In Press date: 13 February 2018
e-pub ahead of print date: 17 April 2018
Published date: April 2018
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Identifiers

Local EPrints ID: 421309
URI: http://eprints.soton.ac.uk/id/eprint/421309
DOI: doi:10.1103/PhysRevD.97.072010
ISSN: 1550-7998
PURE UUID: 2ec2bc7f-7773-4364-892e-75e4d3e36b36
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 01 Jun 2018 16:30
Last modified: 05 Oct 2024 01:43

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Contributors

Author: Alexander Belyaev ORCID iD
Corporate Author: The CMS Collaboration

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