QCD corrections at subleading power for inclusive nonleptonic $b\rightarrow c\bar u d$ decays
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911986615320576 |
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| author | Mannel, Thomas Moreno, Daniel Pivovarov, Alexei A. |
| author_facet | Mannel, Thomas Moreno, Daniel Pivovarov, Alexei A. |
| contents | In this paper we compute the NLO QCD corrections for the inclusive nonleptonic decay rates of $B$-hadrons at subleading power of the heavy quark expansion. In particular, we discuss the coefficient of the chromomagnetic moment parameter $μ_G$ which has a large uncertainty at leading order due to its dependence on the renormalization scale. We find that the renormalization-scale dependence of this coefficient is significantly reduced, thereby reducing the theoretical uncertainty of the coefficient and consequently of the rates. The sign of the coefficient becomes stable, and we estimate that the NLO corrections will increase the decay rates by around $2\%$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_06767 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | QCD corrections at subleading power for inclusive nonleptonic $b\rightarrow c\bar u d$ decays Mannel, Thomas Moreno, Daniel Pivovarov, Alexei A. High Energy Physics - Phenomenology In this paper we compute the NLO QCD corrections for the inclusive nonleptonic decay rates of $B$-hadrons at subleading power of the heavy quark expansion. In particular, we discuss the coefficient of the chromomagnetic moment parameter $μ_G$ which has a large uncertainty at leading order due to its dependence on the renormalization scale. We find that the renormalization-scale dependence of this coefficient is significantly reduced, thereby reducing the theoretical uncertainty of the coefficient and consequently of the rates. The sign of the coefficient becomes stable, and we estimate that the NLO corrections will increase the decay rates by around $2\%$. |
| title | QCD corrections at subleading power for inclusive nonleptonic $b\rightarrow c\bar u d$ decays |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2408.06767 |