Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment

G. Aad; T. Abajyan; B. Abbott; J. Abdallah; S. Khalek; Mogens Dam; Jørgen Beck Hansen; Peter Henrik Hansen; John Renner Hansen; Jørn Dines Hansen; Nele Maria Philomena Boelaert; Simon Johann Franz Heisterkamp; Morten Dam Jørgensen; Esben Bryndt Klinkby; Ask Emil Løvschall-Jensen; Sascha Mehlhase; Björn Stefan Nilsson; Troels Christian Petersen; Stefania Xella

doi:10.1103/PhysRevD.87.032002

Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment

G. Aad, T. Abajyan, B. Abbott, J. Abdallah, S. Khalek, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Nele Maria Philomena Boelaert, Simon Johann Franz Heisterkamp, Morten Dam Jørgensen, Esben Bryndt Klinkby, Ask Emil Løvschall-Jensen, Sascha Mehlhase, Björn Stefan Nilsson, Troels Christian Petersen, Stefania Xella

Experimental Particle Physics

34 Citations (Scopus)

Abstract

A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ⁺μ^-)Λ0(pπ ^-) is presented. The analysis uses a signal sample of about 2200 Λb0 and Λ̄b0 decays that are reconstructed in 4.9 fb ^-1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τ_Λb=1.449±0.036(stat) ±0.017(syst) ps and m_Λb=5619.7±0. 7(stat)±1.1(syst) MeV.

Original language	English
Article number	032002
Journal	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Volume	87
Issue number	2
ISSN	1550-7998
DOIs	https://doi.org/10.1103/PhysRevD.87.032002
Publication status	Published - 4 Feb 2013

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10.1103/PhysRevD.87.032002

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Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S., Dam, M., Hansen, J. B., Hansen, P. H., Hansen, J. R., Hansen, J. D., Boelaert, N. M. P., Heisterkamp, S. J. F., Jørgensen, M. D., Klinkby, E. B., Løvschall-Jensen, A. E., Mehlhase, S., Nilsson, B. S., Petersen, T. C., & Xella, S. (2013). Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment. Physical Review D (Particles, Fields, Gravitation and Cosmology), 87(2), Article 032002. https://doi.org/10.1103/PhysRevD.87.032002

Aad, G, Abajyan, T, Abbott, B, Abdallah, J, Khalek, S, Dam, M , Hansen, JB , Hansen, PH , Hansen, JR , Hansen, JD, Boelaert, NMP, Heisterkamp, SJF, Jørgensen, MD, Klinkby, EB, Løvschall-Jensen, AE, Mehlhase, S, Nilsson, BS, Petersen, TC & Xella, S 2013, 'Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment', Physical Review D (Particles, Fields, Gravitation and Cosmology), vol. 87, no. 2, 032002. https://doi.org/10.1103/PhysRevD.87.032002

@article{41dff3e10ed349b3adcafcfee920fe85,

title = "Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment",

abstract = "A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ+μ-)Λ0(pπ -) is presented. The analysis uses a signal sample of about 2200 Λb0 and {\=Λ}b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τΛb=1.449±0.036(stat) ±0.017(syst) ps and mΛb=5619.7±0. 7(stat)±1.1(syst) MeV.",

author = "G. Aad and T. Abajyan and B. Abbott and J. Abdallah and S. Khalek and Mogens Dam and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {John Renner} and Hansen, {J{\o}rn Dines} and Boelaert, {Nele Maria Philomena} and Heisterkamp, {Simon Johann Franz} and J{\o}rgensen, {Morten Dam} and Klinkby, {Esben Bryndt} and L{\o}vschall-Jensen, {Ask Emil} and Sascha Mehlhase and Nilsson, {Bj{\"o}rn Stefan} and Petersen, {Troels Christian} and Stefania Xella",

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doi = "10.1103/PhysRevD.87.032002",

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T1 - Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Khalek, S.

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, John Renner

AU - Hansen, Jørn Dines

AU - Boelaert, Nele Maria Philomena

AU - Heisterkamp, Simon Johann Franz

AU - Jørgensen, Morten Dam

AU - Klinkby, Esben Bryndt

AU - Løvschall-Jensen, Ask Emil

AU - Mehlhase, Sascha

AU - Nilsson, Björn Stefan

AU - Petersen, Troels Christian

AU - Xella, Stefania

PY - 2013/2/4

Y1 - 2013/2/4

N2 - A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ+μ-)Λ0(pπ -) is presented. The analysis uses a signal sample of about 2200 Λb0 and Λ̄b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τΛb=1.449±0.036(stat) ±0.017(syst) ps and mΛb=5619.7±0. 7(stat)±1.1(syst) MeV.

AB - A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ+μ-)Λ0(pπ -) is presented. The analysis uses a signal sample of about 2200 Λb0 and Λ̄b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τΛb=1.449±0.036(stat) ±0.017(syst) ps and mΛb=5619.7±0. 7(stat)±1.1(syst) MeV.

U2 - 10.1103/PhysRevD.87.032002

DO - 10.1103/PhysRevD.87.032002

M3 - Journal article

SN - 1550-7998

VL - 87

JO - Physical Review D (Particles, Fields, Gravitation and Cosmology)

JF - Physical Review D (Particles, Fields, Gravitation and Cosmology)

IS - 2

M1 - 032002

ER -

Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment

Abstract

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