A measurement of the Lambda(0)(b) lifetime and mass in the decay channel Lambda(0)(b) -> J/psi (mu(+) mu(-))Lambda(0)(p pi(-)) is presented. The analysis uses a signal sample of about 2200 Lambda(0)(b) and (Lambda) over bar (0)(b) 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 Lambda(0)(b) lifetime and mass. They are measured to be tau(Lambda b) = 1.449 +/- 0.036(stat) +/- 0.017(syst) ps and m(Lambda b) = 5619.7 +/- 0.7(stat) +/- 1.1(syst) MeV. DOI: 10.1103/PhysRevD.87.032002

Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment / G., A., T., A., B., A., J., A., S. A., K., A. A., A., O., A., R., A., B., A., M., A., O. S., A., H., A., H., A., E., A., B. S., A., L., A., D. L., A., T. N., A., J., A., S., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 87:(2013), p. 032002. [10.1103/physrevd.87.032002]

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

BAGNAIA, Paolo;BINI, Cesare;DIONISI, Carlo;GAUZZI, Paolo;GENTILE, Simonetta;GIAGU, Stefano;LACAVA, Francesco;LUCI, Claudio;MESSINA, Andrea;MONZANI, SIMONE;A. Policicchio;SOLFAROLI CAMILLOCCI, ELENA;VERDUCCI, MONICA;
2013

Abstract

A measurement of the Lambda(0)(b) lifetime and mass in the decay channel Lambda(0)(b) -> J/psi (mu(+) mu(-))Lambda(0)(p pi(-)) is presented. The analysis uses a signal sample of about 2200 Lambda(0)(b) and (Lambda) over bar (0)(b) 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 Lambda(0)(b) lifetime and mass. They are measured to be tau(Lambda b) = 1.449 +/- 0.036(stat) +/- 0.017(syst) ps and m(Lambda b) = 5619.7 +/- 0.7(stat) +/- 1.1(syst) MeV. DOI: 10.1103/PhysRevD.87.032002
2013
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment / G., A., T., A., B., A., J., A., S. A., K., A. A., A., O., A., R., A., B., A., M., A., O. S., A., H., A., H., A., E., A., B. S., A., L., A., D. L., A., T. N., A., J., A., S., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 87:(2013), p. 032002. [10.1103/physrevd.87.032002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/555884
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