Prospects for the spin structure study of hyperons using heavy quark decays at Belle II

QCD corrections to heavy quark decays

Canadian Journal of Physics ◽

10.1139/p07-054 ◽

2007 ◽

Vol 85 (6) ◽

pp. 613-617

Author(s):

I Blokland

Keyword(s):

Heavy Quark ◽

Symbolic Computation ◽

Decay Rates ◽

Special Cases ◽

Quark Decays ◽

Quark Decay

The calculation of QCD corrections to heavy quark decay rates has progressed steadily in recent years. With the help of specialized techniques, symbolic computation, and a growing base of experience, a wide variety of special cases have been evaluated. These results have been applied to decays such as t → bW, b → s γ, b → u[Formula: see text]ν, and b → c[Formula: see text]ν. PACS Nos.: 12.38.Bx, 13.30.Ce

Download Full-text

Recent Perturbative Results on Heavy Quark Decays

Continuous Advances in QCD 2008 ◽

10.1142/9789812838667_0002 ◽

2008 ◽

Author(s):

J. H. Piclum ◽

M. Dowling ◽

A. Pak

Keyword(s):

Heavy Quark ◽

Quark Decays

Download Full-text

Heavy quark spin structure in Z_b resonances

10.22323/1.171.0156 ◽

2013 ◽

Cited By ~ 1

Author(s):

Roman Mizuk

Keyword(s):

Heavy Quark ◽

Spin Structure ◽

Quark Spin

Download Full-text

Impact of background effects on the inclusive Vcb determination

Journal of High Energy Physics ◽

10.1007/jhep09(2021)051 ◽

2021 ◽

Vol 2021 (9) ◽

Author(s):

Thomas Mannel ◽

Muslem Rahimi ◽

K. Keri Vos

Keyword(s):

Monte Carlo ◽

Heavy Quark ◽

High Precision ◽

Monte Carlo Methods ◽

Monte Carlo Data ◽

Theoretical Predictions ◽

Experimental Side ◽

Belle Ii

Abstract The determination of the CKM element Vcb from inclusive semileptonic b → cℓ$$ \overline{\nu} $$ ν ¯ decays has reached a high precision thanks to a combination of theoretical and experimental efforts. Aiming towards even higher precision, we discuss two processes that contaminate the inclusive Vcb determination; the b → u background and the contribution of the tauonic mode: b → c(τ → μν$$ \overline{\nu} $$ ν ¯ )$$ \overline{\nu} $$ ν ¯ . Both of these contributions are dealt with at the experimental side, using Monte-Carlo methods and momentum cuts. However, these contributions can be calculated with high precision within the Heavy-Quark Expansion. In this note, we calculate the theoretical predictions for these two processes. We compare our b → u results qualitatively with generator-level Monte-Carlo data used at Belle and Belle II. Finally, we suggest to change the strategy for the extraction of Vcb by comparing the data on B → Xℓ directly with the theoretical expressions, to which our paper facilitates.

Download Full-text