We report a measurement of the lifetime of the Lambda0(b) baryon in decays to the Lambda+_c pi+- final state in a sample corresponding to 1.1 fb-1 collected in p anti-p collisions at s**(1/2) = 1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Lambda0(b) events we measure tau(Lambda0(b)) = 1.401 +/- 0.046 (stat) +/- 0.035 (syst) ps (corresponding to c tau(Lambda0(b)) = 420.1 +/- 13.7 (stat) +/- 10.6 (syst) mu m, where c is the speed of light). The ratio of this result and the world average B0 lifetime yields tau (Lambda0(b))/tau(B0) = 0.918 +/- 0.038 (stat and syst), in good agreement with recent theoretical predictions.

T. AALTONEN, B.ALVAREZ GONZALEZV, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2010). Measurement of the Lambda0(b) Lifetime in Lambda0(b) --> Lambda+_c pi+- Decays in p anti-p Collisions at s**(1/2) =1.96 TeV. PHYSICAL REVIEW LETTERS, 104, 102002-1-102002-8 [10.1103/PhysRevLett.104.102002].

Measurement of the Lambda0(b) Lifetime in Lambda0(b) --> Lambda+_c pi+- Decays in p anti-p Collisions at s**(1/2) =1.96 TeV

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MARGAROLI, FABRIZIO;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2010

Abstract

We report a measurement of the lifetime of the Lambda0(b) baryon in decays to the Lambda+_c pi+- final state in a sample corresponding to 1.1 fb-1 collected in p anti-p collisions at s**(1/2) = 1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Lambda0(b) events we measure tau(Lambda0(b)) = 1.401 +/- 0.046 (stat) +/- 0.035 (syst) ps (corresponding to c tau(Lambda0(b)) = 420.1 +/- 13.7 (stat) +/- 10.6 (syst) mu m, where c is the speed of light). The ratio of this result and the world average B0 lifetime yields tau (Lambda0(b))/tau(B0) = 0.918 +/- 0.038 (stat and syst), in good agreement with recent theoretical predictions.
2010
T. AALTONEN, B.ALVAREZ GONZALEZV, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2010). Measurement of the Lambda0(b) Lifetime in Lambda0(b) --> Lambda+_c pi+- Decays in p anti-p Collisions at s**(1/2) =1.96 TeV. PHYSICAL REVIEW LETTERS, 104, 102002-1-102002-8 [10.1103/PhysRevLett.104.102002].
T. AALTONEN; B.ALVAREZ GONZALEZV; S. AMERIO; D. AMIDEI; A. ANASTASSOV; A. ANNOVI; J. ANTOS; G. APOLLINARI; J.A. APPEL; A. APRESYAN; T. ARISAWA; A. AR...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/99390
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