We present the first observation of the baryon decay Λb0→ Λc+π- followed by Λc+→pK-π+ in 106pb-1 pp̄ collisions at s=1.96TeV in the CDF experiment. In order to reduce systematic error, the measured rate for Λb0 decay is normalized to the kinematically similar meson decay B̄0→D+π- followed by D+→π+K-π+. We report the ratio of production cross sections (σ) times the ratio of branching fractions (B) for the momentum region integrated above pT>6GeV/c and pseudorapidity range |η|<1.3: σ(pp̄→Λb0X)/ σ(pp̄→B̄0X)×B(Λb0→Λc+π-)/ B(B̄0→D+π-)=0.82±0.08(stat)±0.11(syst)±0. 22[B(Λc+→pK-π+)]

A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, D. Ambrose, et al. (2007). Measurement of sigma_Lambda0(b)/sigma B-bar0 x B(Lambda0(b) --> Lambda+_c pi+-)/B(B0 --> D+ pi+-) in p anti-p Collisions at s**(1/2) = 1.96 TeV. PHYSICAL REVIEW LETTERS, 98(12), 1-7 [10.1103/PhysRevLett.98.122002].

Measurement of sigma_Lambda0(b)/sigma B-bar0 x B(Lambda0(b) --> Lambda+_c pi+-)/B(B0 --> D+ pi+-) in p anti-p Collisions at s**(1/2) = 1.96 TeV

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2007

Abstract

We present the first observation of the baryon decay Λb0→ Λc+π- followed by Λc+→pK-π+ in 106pb-1 pp̄ collisions at s=1.96TeV in the CDF experiment. In order to reduce systematic error, the measured rate for Λb0 decay is normalized to the kinematically similar meson decay B̄0→D+π- followed by D+→π+K-π+. We report the ratio of production cross sections (σ) times the ratio of branching fractions (B) for the momentum region integrated above pT>6GeV/c and pseudorapidity range |η|<1.3: σ(pp̄→Λb0X)/ σ(pp̄→B̄0X)×B(Λb0→Λc+π-)/ B(B̄0→D+π-)=0.82±0.08(stat)±0.11(syst)±0. 22[B(Λc+→pK-π+)]
2007
A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, D. Ambrose, et al. (2007). Measurement of sigma_Lambda0(b)/sigma B-bar0 x B(Lambda0(b) --> Lambda+_c pi+-)/B(B0 --> D+ pi+-) in p anti-p Collisions at s**(1/2) = 1.96 TeV. PHYSICAL REVIEW LETTERS, 98(12), 1-7 [10.1103/PhysRevLett.98.122002].
A. Abulencia; J. Adelman; T. Affolder; T. Akimoto; M. G. Albrow; D. Ambrose; S. Amerio; D. Amidei; A. Anastassov; K. Anikeev; A. Annovi; J. Antos; M. ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/54423
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