The LHCb measurement of the lifetime ratio of the Λ0b baryon to the anti-B0 meson is updated using data corresponding to an integrated luminosity of 3.0 fb^−1 collected using 7 and 8 TeV centre-of-mass energy pp collisions at the LHC. The decay modes used are Λ0b → J/ψ p K− and anti-B0 → J/ψ π+ K−, where the π+ K− mass is consistent with that of the anti-K∗0(892) meson. The lifetime ratio is determined with unprecedented precision to be 0.974 ± 0.006 ± 0.004, where the first uncertainty is statistical and the second systematic. This result is in agreement with original theoretical predictions based on the heavy quark expansion. Using the current world average of the anti-B0 lifetime, the Λ0b lifetime is found to be 1.479 ± 0.009 ± 0.010 ps.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. (2014). Precision Measurement of the Ratio of the Λ0b to anti-B0 Lifetimes. PHYSICS LETTERS. SECTION B, 734, 122-130 [10.1016/j.physletb.2014.05.021].

Precision Measurement of the Ratio of the Λ0b to anti-B0 Lifetimes

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

The LHCb measurement of the lifetime ratio of the Λ0b baryon to the anti-B0 meson is updated using data corresponding to an integrated luminosity of 3.0 fb^−1 collected using 7 and 8 TeV centre-of-mass energy pp collisions at the LHC. The decay modes used are Λ0b → J/ψ p K− and anti-B0 → J/ψ π+ K−, where the π+ K− mass is consistent with that of the anti-K∗0(892) meson. The lifetime ratio is determined with unprecedented precision to be 0.974 ± 0.006 ± 0.004, where the first uncertainty is statistical and the second systematic. This result is in agreement with original theoretical predictions based on the heavy quark expansion. Using the current world average of the anti-B0 lifetime, the Λ0b lifetime is found to be 1.479 ± 0.009 ± 0.010 ps.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. (2014). Precision Measurement of the Ratio of the Λ0b to anti-B0 Lifetimes. PHYSICS LETTERS. SECTION B, 734, 122-130 [10.1016/j.physletb.2014.05.021].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A.A. Alves...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/292116
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