تقرير
A closer look at the extraction of $|V_{ub}|$ from $B\to\pi l\nu$
| العنوان: | A closer look at the extraction of $|V_{ub}|$ from $B\to\pi l\nu$ |
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| المؤلفون: | Biswas, Aritra, Nandi, Soumitra, Patra, Sunando Kumar, Ray, Ipsita |
| سنة النشر: | 2021 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Lattice High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment, High Energy Physics - Lattice |
| الوصف: | To extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $|V_{ub}|$, we have re-analyzed all the available inputs (data and theory) on the $B\to\pi l\nu$ decays including the newly available inputs on the form-factors from light cone sum rule (LCSR) approach. We have reproduced and compared the results with the procedure taken up by the Heavy Flavor Averaging Group (HFLAV), while commenting on the effect of outliers on the fits. After removing the outliers and creating a comparable group of data-sets, we mention a few scenarios in the extraction of $|V_{ub}|$. In all those scenarios, the extracted values of $|V_{ub}|$ are higher than that obtained by HFLAV. Our best results for $|V_{ub}|^{exc.}$ are $(3.88 \pm 0.13)\times 10^{-3}$ and $(3.87 \pm 0.13)\times 10^{-3}$ in frequentist and Bayesian approaches, respectively, which are consistent with that extracted from inclusive decays $|V_{ub}|^{inc}$ within $1~\sigma$ confidence interval. Comment: Two figures added, version accepted for publication in JHEP |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1007/JHEP07(2021)082 |
| URL الوصول: | http://arxiv.org/abs/2103.01809 |
| رقم الأكسشن: | edsarx.2103.01809 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1007/JHEP07(2021)082 |
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