ExtractingVubwithout recourse to structure functions
نویسندگان
چکیده
منابع مشابه
Vub Without Recourse to Structure Functions
We present a closed form expression for |Vub|/|VtbV ∗ ts| in terms of the endpoint photon and lepton spectra from the inclusive decays B → Xs γ and B → Xu l ν, respectively, which includes the resummation of the endpoint logs at next to leading order and is completely independent of the B meson structure function. The use of this expression for extracting Vub would eliminate the large systemati...
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ν = q · P M = E − E′ is the lepton’s energy loss in the nucleon rest frame (in earlier literature sometimes ν = q · P ). Here, E and E′ are the initial and final lepton energies in the nucleon rest frame. Q = −q2 = 2(EE′−−→k · −→k )−ml −m2l′ where ml(ml′) is the initial (final) lepton mass. If EE′ sin(θ/2) ≫ m2l , m2l′ , then ≈ 4EE′ sin(θ/2), where θ is the lepton’s scattering angle with respec...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2000
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.61.053006