2001/01/29 by C. Bauer, Christian W. Bauer, Bauer, Christian W. +4
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0101328
9 pages, 5 figures. Manuscript has considerable overlap with hep-ph/0007054. Invited talk presented by Michael Luke at the 5th International Symposium on Radiative Corrections (RADCOR 2000) Carmel CA, USA, 11-15 September, 2000
arxiv created 2001/01/29 · openalex publication_date 2001/01/29 · arxiv updated 2009/11/30 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
The invariant mass spectrum of the lepton pair in inclusive semileptonic B→ Xu ℓν decay yields a model independent determination of |Vub|. Unlike the lepton energy and hadronic invariant mass spectra, nonperturbative effects are only important in the resonance region, and play a parametrically suppressed role when dΓ/ dq2 is integrated over q2 > (mB-mD)2, which is required to eliminate the B→ Xc ℓν background. We discuss these backgrounds for q2 slightly below (mB-mD)2, and point out that instead of q2 > (mB-mD)2 = 11.6 GeV2, the cut can be lowered to q2 \gtrsim 10.5 GeV2. This is important experimentally, particularly when effects of a finite neutrino reconstruction resolution are included.