Determination of |V| using N3LO perturbative corrections to ?(B ? X??) and 1S masses
نویسندگان
چکیده
We determine |Vcb| using the third-order perturbative series for inclusive semileptonic B decay width and masses of bottomonium 1S states. use ?b(1S) ?(1S) as short-distance point out that there is a sizable difference between two mass schemes. This dominant error our determination stems from insufficiency to describe theoretically observed splitting also study significance O(?MS?2) non-perturbative effects in HQET with respect current accuracy. Our result |Vcb|=0.0425(11) consistent PDG value determined decays has slightly larger error.
منابع مشابه
Perturbative and Non-perturbative Corrections to B → Dlν
The ratios R+, R1, and RA are defined at zero recoil; the ratio R− is defined in the limit of zero recoil. The ρ are matching factors, needed to patch radiative corrections from short distances. The ratios R+ and R− directly give the form factors h+ and h−, which together form the hadronic amplitude for B → Dlν. Information from R+, R1, and RA must be extracted from their heavy quark expansions...
متن کاملPerturbative corrections to semileptonic b decay distributions
We compute O(αs) and O(α n sβ n−1 0 ) (BLM) corrections to the five structure functions relevant for b → qlν̄ decays and apply the results to the moments of a few distributions of phenomenological importance. We present compact analytic one-loop formulae for the structure functions, with proper subtraction of the soft divergence.
متن کاملPerturbative corrections to zero recoil inclusive B decay sum rules
Comparing the result of inserting a complete set of physical states in a time ordered product of b decay currents with the operator product expansion gives a class of zero recoil sum rules. They sum over physical states with excitation energies less than ∆, where ∆ is much greater than the QCD scale and much less than the heavy charm and bottom quark masses. These sum rules have been used to de...
متن کاملthe innovation of a statistical model to estimate dependable rainfall (dr) and develop it for determination and classification of drought and wet years of iran
آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
15 صفحه اولdevelopment of different optical methods for determination of glucose using cadmium telluride quantum dots and silver nanoparticles
a simple, rapid and low-cost scanner spectroscopy method for the glucose determination by utilizing glucose oxidase and cdte/tga quantum dots as chromoionophore has been described. the detection was based on the combination of the glucose enzymatic reaction and the quenching effect of h2o2 on the cdte quantum dots (qds) photoluminescence.in this study glucose was determined by utilizing glucose...
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: Physics Letters B
سال: 2022
ISSN: ['0370-2693', '1873-2445']
DOI: https://doi.org/10.1016/j.physletb.2022.137068