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@ARTICLE{Cao:455041,
author = {Cao, L. and Sutcliffe, W. and Van Tonder, R. and
Bernlochner, F. U. and Adachi, I. and Aihara, H. and Al
Said, S. and Asner, D. M. and Atmacan, H. and Aushev, T. and
Ayad, R. and Babu, Varghese and Bauer, M. and Behera, P. and
Belous, K. and Bennett, J. and Bessner, M. and Bhardwaj, V.
and Bilka, T. and Biswal, J. and Bonvicini, G. and Bozek, A.
and Bračko, M. and Browder, T. E. and Campajola, M. and
Červenkov, D. and Chang, M.-C. and Chang, P. and Chekelian,
V. and Chen, A. and Cheon, B. G. and Chilikin, K. and Cho,
H. E. and Cho, K. and Cho, S.-J. and Choi, S.-K. and Choi,
Y. and Choudhury, S. and Cinabro, D. and Cunliffe, S. and
Das, S. and Dash, N. and De Nardo, G. and Di Capua, F. and
Dingfelder, J. and Doležal, Z. and Dong, T. V. and Dubey,
S. and Eidelman, S. and Epifanov, D. and Ferber, T. and
Ferlewicz, D. and Frey, A. and Fulsom, B. G. and Garg, R.
and Gaur, V. and Garmash, A. and Giri, A. and Goldenzweig,
P. and Guan, Y. and Hadjivasiliou, C. and Hara, T. and
Hartbrich, O. and Hayasaka, K. and Hayashii, H. and Hedges,
M. T. and Hernandez Villanueva, M. and Hou, W.-S. and Hsu,
C.-L. and Iijima, T. and Inami, K. and Ishikawa, A. and
Itoh, R. and Iwasaki, M. and Iwasaki, Y. and Jacobs, W. W.
and Jang, E.-J. and Jeon, H. B. and Jia, S. and Jin, Y. and
Joo, C. W. and Joo, K. K. and Kang, K. H. and Karyan, G. and
Kawasaki, T. and Kichimi, H. and Kiesling, C. and Kim, B. H.
and Kim, C. H. and Kim, D. Y. and Kim, H. J. and Kim, K.-H.
and Kim, S. H. and Kim, Y.-K. and Kinoshita, K. and Kodyš,
P. and Konno, T. and Korobov, A. and Korpar, S. and
Kotchetkov, D. and Kovalenko, E. and Križan, P. and
Kroeger, R. and Krokovny, P. and Kuhr, T. and Kumar, M. and
Kumar, R. and Kumara, K. and Kuzmin, A. and Kwon, Y.-J. and
Lalwani, K. and Lange, J. S. and Lee, I. S. and Lee, S. C.
and Lewis, P. and Li, C. H. and Li, J. and Li, L. K. and Li,
Y. B. and Li Gioi, L. and Libby, J. and Lieret, K. and
Liptak, Z. and Liventsev, D. and MacNaughton, J. and
MacQueen, C. and Masuda, M. and Matsuda, T. and Matvienko,
D. and Merola, M. and Metzner, F. and Miyabayashi, K. and
Mizuk, R. and Mohanty, G. B. and Moon, T. J. and Mori, T.
and Mrvar, M. and Mussa, R. and Nakao, M. and Natkaniec, Z.
and Natochii, A. and Nayak, L. and Nayak, M. and Niiyama, M.
and Nisar, N. K. and Nishida, S. and Nishimura, K. and
Ogawa, S. and Ono, H. and Onuki, Y. and Oskin, P. and
Pakhlov, P. and Pakhlova, G. and Pang, T. and Pardi, S. and
Park, C. W. and Park, H. and Park, S.-H. and Patra, S. and
Paul, S. and Pedlar, T. K. and Pestotnik, R. and Piilonen,
L. E. and Podobnik, T. and Popov, V. and Prencipe, E. and
Prim, M. T. and Ritter, M. and Roehrken, Markus and
Rostomyan, A. and Rout, N. and Rozanska, M. and Russo, G.
and Sahoo, D. and Sakai, Y. and Sandilya, S. and Sangal, A.
and Santelj, L. and Sanuki, T. and Savinov, V. and Schnell,
G. and Schueler, J. and Schwanda, C. and Schwartz, A. J. and
Seino, Y. and Senyo, K. and Sevior, M. E. and Shapkin, M.
and Sharma, C. and Shen, C. P. and Shiu, J.-G. and Simon, F.
and Sokolov, A. and Solovieva, E. and Stanič, S. and
Starič, M. and Stottler, Z. S. and Strube, J. F. and
Sumiyoshi, T. and Takizawa, M. and Tamponi, U. and Tanida,
K. and Tenchini, Francesco and Trabelsi, K. and Uchida, M.
and Uglov, T. and Unno, Y. and Uno, S. and Urquijo, P. and
Usov, Y. and Vahsen, S. E. and Varner, G. and Varvell, K. E.
and Vinokurova, A. and Vorobyev, V. and Vossen, A. and
Waheed, E. and Wang, C. H. and Wang, E. and Wang, M.-Z. and
Wang, P. and Watanabe, M. and Watanuki, S. and Wehle, S. and
Wiechczynski, J. and Won, E. and Xu, X. and Yabsley, B. D.
and Yan, W. and Yang, S. B. and Ye, Hua and Yin, J. H. and
Yuan, C. Z. and Yusa, Y. and Zhang, Z. P. and Zhilich, V.
and Zhukova, V. and Zhulanov, V. and {Belle Collaboration}},
title = {{M}easurements of {P}artial {B}ranching {F}ractions of
{I}nclusive ${B} \to {X}_u \, \ell^+\, \nu_{\ell}$ {D}ecays
with {H}adronic {T}agging},
reportid = {PUBDB-2021-00901, arXiv:2102.00020. Belle Preprint 2020-22.
KEK Preprint 2020-39},
year = {2021},
note = {31 pages, 22 figures, 7 tables. To be submitted to Phys.
Rev. D 29.01.2021},
abstract = {We present measurements of partial branching fractions of
inclusive semileptonic $B \to X_u \, \ell^+\, \nu_{\ell}$
decays using the full Belle data set of 711 fb$^{-1}$ of
integrated luminosity at the $\Upsilon(4S)$ resonance and
for $\ell = e, \mu$. Inclusive semileptonic $B \to X_u \,
\ell^+\, \nu_{\ell}$ decays are CKM suppressed and
measurements are complicated by the large background from
CKM-favored $B \to X_c \, \ell^+\, \nu_{\ell}$ transitions,
which have a similar signature. Using machine learning
techniques, we reduce this and other backgrounds
effectively, whilst retaining access to a large fraction of
the $B \to X_u \, \ell^+\, \nu_{\ell}$ phase space and high
signal efficiency. We measure partial branching fractions in
three phase-space regions covering about $31\\%$ to $86\\%$
of the accessible $B \to X_u \, \ell^+\, \nu_{\ell}$ phase
space. The most inclusive measurement corresponds to the
phase space with lepton energies of $E_\ell^B > 1 $ GeV, and
we obtain $\Delta \mathcal{B}(B \to X_u \ell^+ \, \nu_\ell)
= \left( 1.59 \pm 0.07 \pm 0.17 \right) \times 10^{-3}$ from
a two-dimensional fit of the hadronic mass spectrum and the
four-momentum-transfer squared distribution, with the
uncertainties denoting the statistical and systematic error.
We find $\left| V_{ub} \right| = \left( 4.10 \pm 0.09 \pm
0.22 \pm 0.15 \right) \times 10^{-3}$ from an average of
four calculations for the partial decay rate with the third
uncertainty denoting the average theory error. This value is
higher but compatible with the determination from exclusive
semileptonic decays within 1.3 standard deviations. In
addition, we report charmless inclusive partial branching
fractions separately for $B^+$ and $B^0$ mesons as well as
for electron and muon final states. No isospin breaking or
lepton flavor universality violating effects are observed.},
keywords = {* Automatic Keywords * (INSPIRE) / lepton: universality:
violation (INSPIRE) / lepton: flavor: universality (INSPIRE)
/ universality: violation (INSPIRE) / flavor: universality
(INSPIRE) / muon: final state (INSPIRE) / lepton: energy
(INSPIRE) / lepton: flavor (INSPIRE) / dimension: 2
(INSPIRE) / branching ratio (INSPIRE) / phase space
(INSPIRE) / background (INSPIRE) / semileptonic decay
(INSPIRE) / Upsilon(10570) (INSPIRE) / mass spectrum
(INSPIRE) / statistical (INSPIRE) / suppression (INSPIRE) /
efficiency (INSPIRE) / decay rate (INSPIRE) / signature
(INSPIRE) / electron (INSPIRE) / isospin (INSPIRE) / BELLE
(INSPIRE) / meson (INSPIRE) / GeV (INSPIRE)},
cin = {Belle},
cid = {I:(DE-H253)Belle-20160426},
pnm = {611 - Fundamental Particles and Forces (POF4-611)},
pid = {G:(DE-HGF)POF4-611},
experiment = {EXP:(DE-H253)BELLE-20150101},
typ = {PUB:(DE-HGF)25},
eprint = {2102.00020},
howpublished = {arXiv:2102.00020},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2102.00020;\%\%$},
doi = {10.3204/PUBDB-2021-00901},
url = {https://bib-pubdb1.desy.de/record/455041},
}
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