Subleading Shape Functions in Inclusive B Decays

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Subleading Shape Functions in Inclusive B Decays

The contributions of subleading shape functions to inclusive decay distributions of B mesons are derived from a systematic two-step matching of QCD current correlators onto soft-collinear and heavy-quark effective theory. At tree-level, the results can be expressed in terms of forward matrix elements of bi-local light-cone operators. Fourquark operators, which arise at O(αs), are included. Our ...

متن کامل

Subleading Jet Functions in Inclusive B Decays

The contribution of subleading jet functions to inclusive decay distributions of B mesons are derived from a systematic two-step matching of QCD current correlators onto soft collinear and heavy quark effective theory. Focusing on the tree level matching of QCD onto soft collinear effective theory, the subleading jet functions are defined to all orders in αs(μi) (with μ 2 i ∼ mbΛQCD) and are ca...

متن کامل

Light - cone distribution functions for B decays at subleading order in 1 / m b

We construct the higher twist structure functions that describe inclusive b hadron decays in regions of phase space where the hadronic decay products carry high energy but have low invariant mass. We show that, for B meson decays, there are four new non-vanishing matrix elements of non-local operators. We show that to subleading twist these decays are parametrized in terms of four functions. We...

متن کامل

Subleading Light - cone distributions functions in the decays Λ b → X s γ and Λ b →

In this paper we investigate the subleading twist corrections to the photon energy spectrum in the decay Λb → Xsγ and to the lepton energy spectrum in Λb → Xulν̄l. As a first step we rederive the matching coefficients of the subleading twist using a much simpler method. Parametrizing the matrix elements for Λb and using reparametrization invariance, we show that the energy spectra close to the e...

متن کامل

Inclusive semileptonic B decays

In the framework of the Standard Model, the quark sector is characterised by a rich pattern of flavourchanging transitions, described by the CabibboKobayashi-Maskawa (CKM) matrix. The quark transitions B → Xclν and B → Xulν provide a way for determining these CKM matrix elements. This report reviews the experimental measurements used to extract the quark mixing parameters |Vcb| and |Vub| from t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of High Energy Physics

سال: 2004

ISSN: 1029-8479

DOI: 10.1088/1126-6708/2004/11/073