Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S masses
We determine |Vcb| using the third-order perturbative series for the inclusive semileptonic B decay width and for the masses of the bottomonium 1S states. We use the masses of ηb(1S) and ϒ(1S) as short-distance masses and point out that there is a sizable difference of |Vcb| between the two 1S mass...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-06-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322002027 |
| _version_ | 1818474823808974848 |
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| author | Yuuki Hayashi Yukinari Sumino Hiromasa Takaura |
| author_facet | Yuuki Hayashi Yukinari Sumino Hiromasa Takaura |
| author_sort | Yuuki Hayashi |
| collection | DOAJ |
| description | We determine |Vcb| using the third-order perturbative series for the inclusive semileptonic B decay width and for the masses of the bottomonium 1S states. We use the masses of ηb(1S) and ϒ(1S) as short-distance masses and point out that there is a sizable difference of |Vcb| between the two 1S mass schemes. This is the dominant error of our determination and stems from insufficiency to describe theoretically the observed mass splitting of the bottomonium 1S states. We also study the significance of the O(ΛMS‾2) non-perturbative effects in HQET with respect to the current perturbative accuracy. Our result |Vcb|=0.0425(11) is consistent with the PDG value determined from the inclusive decays and has a slightly larger error. |
| first_indexed | 2024-04-14T04:42:25Z |
| format | Article |
| id | doaj.art-11fdce1d94454bc8b7ba506bedf66d7a |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-14T04:42:25Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-11fdce1d94454bc8b7ba506bedf66d7a2022-12-22T02:11:37ZengElsevierPhysics Letters B0370-26932022-06-01829137068Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S massesYuuki Hayashi0Yukinari Sumino1Hiromasa Takaura2Department of Physics, Tohoku University, Sendai, 980–8578, JapanDepartment of Physics, Tohoku University, Sendai, 980–8578, JapanTheory Center, KEK, Tsukuba, Ibaraki 305-0801, Japan; Corresponding author.We determine |Vcb| using the third-order perturbative series for the inclusive semileptonic B decay width and for the masses of the bottomonium 1S states. We use the masses of ηb(1S) and ϒ(1S) as short-distance masses and point out that there is a sizable difference of |Vcb| between the two 1S mass schemes. This is the dominant error of our determination and stems from insufficiency to describe theoretically the observed mass splitting of the bottomonium 1S states. We also study the significance of the O(ΛMS‾2) non-perturbative effects in HQET with respect to the current perturbative accuracy. Our result |Vcb|=0.0425(11) is consistent with the PDG value determined from the inclusive decays and has a slightly larger error.http://www.sciencedirect.com/science/article/pii/S0370269322002027 |
| spellingShingle | Yuuki Hayashi Yukinari Sumino Hiromasa Takaura Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S masses Physics Letters B |
| title | Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S masses |
| title_full | Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S masses |
| title_fullStr | Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S masses |
| title_full_unstemmed | Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S masses |
| title_short | Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xcℓν) and 1S masses |
| title_sort | determination of vcb using n3lo perturbative corrections to γ b xclν and 1s masses |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322002027 |
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