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Book ; Online: Angular analysis of $B^+ \to \rho^+\rho^0$ decays reconstructed in 2019, 2020, and 2021 Belle II data

Belle II Collaboration / Abudinén, F. / Adachi, I. / Adamczyk, K. / Aggarwal, L. / Ahlburg, P. / Ahmed, H. / Ahn, J. K. / Aihara, H. / Akopov, N. / Aloisio, A. / Ameli, F. / Andricek, L. / Ky, N. Anh / Asner, D. M. / Atmacan, H. / Aulchenko, V. / Aushev, T. / Aushev, V. /

Aziz, T. / Babu, V. / Bacher, S. / Bae, H. / Baehr, S. / Bahinipati, S. / Bakich, A. M. / Bambade, P. / Banerjee, Sw. / Bansal, S. / Barrett, M. / Batignani, G. / Baudot, J. / Bauer, M. / Baur, A. / Beaubien, A. / Beaulieu, A. / Becker, J. / Behera, P. K. / Bennett, J. V. / Bernieri, E. / Bernlochner, F. U. / Bertacchi, V. / Bertemes, M. / Bertholet, E. / Bessner, M. / Bettarini, S. / Bhardwaj, V. / Bhuyan, B. / Bianchi, F. / Bilka, T.

2022

Abstract: We report on a Belle II measurement of the branching fraction ($\mathcal{B}$), longitudinal polarization fraction ($f_L$), and CP asymmetry ($\mathcal{A}_{CP}$) of $B^+\to \rho^+\rho^0$ decays. We reconstruct $B^+\to \rho^+(\to \pi^+\pi^0(\to \gamma\ ... ...

Abstract	We report on a Belle II measurement of the branching fraction ($\mathcal{B}$), longitudinal polarization fraction ($f_L$), and CP asymmetry ($\mathcal{A}_{CP}$) of $B^+\to \rho^+\rho^0$ decays. We reconstruct $B^+\to \rho^+(\to \pi^+\pi^0(\to \gamma\gamma))\rho^0(\to \pi^+\pi^-)$ decays in a sample of SuperKEKB electron-positron collisions collected by the Belle II experiment in 2019, 2020, and 2021 at the $\Upsilon$(4S) resonance and corresponding to 190 fb$^{-1}$ of integrated luminosity. We fit the distributions of the difference between expected and observed $B$ candidate energy, continuum-suppression discriminant, dipion masses, and decay angles of the selected samples, to determine a signal yield of $345 \pm 31$ events. The signal yields are corrected for efficiencies determined from simulation and control data samples to obtain $\mathcal{B}(B^+ \to \rho^+\rho^0) = [23.2^{+\ 2.2}_{-\ 2.1} (\rm stat) \pm 2.7 (\rm syst)]\times 10^{-6}$, $f_L = 0.943 ^{+\ 0.035}_{-\ 0.033} (\rm stat)\pm 0.027(\rm syst)$, and $\mathcal{A}_{CP}=-0.069 \pm 0.068(\rm stat) \pm 0.060 (\rm syst)$. The results agree with previous measurements. This is the first measurement of $\mathcal{A}_{CP}$ in $B^+\to \rho^+\rho^0$ decays reported by Belle II.
Keywords	High Energy Physics - Experiment ; High Energy Physics - Phenomenology
Subject code	571
Publishing date	2022-06-24
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Measurements of the branching fraction, isospin asymmetry, and lepton-universality ratio in $B \to J/\psi K$ decays at Belle II

Belle II Collaboration / Abudinén, F. / Adachi, I. / Adak, R. / Adamczyk, K. / Aggarwal, L. / Ahlburg, P. / Ahmed, H. / Ahn, J. K. / Aihara, H. / Akopov, N. / Aloisio, A. / Ameli, F. / Andricek, L. / Ky, N. Anh / Asner, D. M. / Atmacan, H. / Aulchenko, V. / Aushev, T. /

Aushev, V. / Aziz, T. / Babu, V. / Bacher, S. / Bae, H. / Baehr, S. / Bahinipati, S. / Bakich, A. M. / Bambade, P. / Banerjee, Sw. / Bansal, S. / Barrett, M. / Batignani, G. / Baudot, J. / Bauer, M. / Baur, A. / Beaubien, A. / Beaulieu, A. / Becker, J. / Behera, P. K. / Bennett, J. V. / Bernieri, E. / Bernlochner, F. U. / Bertemes, M. / Bertholet, E. / Bessner, M. / Bettarini, S. / Bhardwaj, V. / Bhuyan, B. / Bianchi, F. / Bilka, T.

2022

Abstract: We report a study of $B \to J/\psi(\ell^{+}\ell^{-})K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $\Upsilon(4S)$ resonance. The data were collected by the Belle II experiment at the SuperKEKB asymmetric- ... ...

Abstract	We report a study of $B \to J/\psi(\ell^{+}\ell^{-})K$ decays, where $\ell$ represents an electron or a muon, using $e^{+}e^{-}$ collisions at the $\Upsilon(4S)$ resonance. The data were collected by the Belle II experiment at the SuperKEKB asymmetric-energy collider during 2019-2021, corresponding to an integrated luminosity of $189$ fb$^{-1}$. The measured quantities are the branching fractions (${\mathcal B}$) of the decay channels $B^{+} \to J/\psi(e^{+}e^{-})K^{+}$, $B^{+} \to J/\psi(\mu^{+}\mu^{-}) K^{+}$, $B^{0} \to J/\psi(e^{+}e^{-}) K^{0}_{S}$, and $B^{0} \to J/\psi(\mu^{+}\mu^{-})K^{0}_{S}$; the lepton-flavor-dependent isospin asymmetries for the electron [$A_{I}\left(B \to J/\psi(e^{+}e^{-}) K\right)$] and muon [$A_{I}\left(B \to J/\psi(\mu^{+} \mu^{-}) K\right)$] channels; and the ratios of branching fractions between the muon and electron channels for the charged [$R_{K^{+}}\left(J/\psi\right)$] and neutral kaon [$R_{K^{0}}\left(J/\psi\right)$] case. The measurements are consistent with the world-average values.
Keywords	High Energy Physics - Experiment
Subject code	612
Publishing date	2022-07-22
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Multielectron transitions above the krypton K edge.

Bernieri / Burattini

Physical review. A, General physics

1987 Volume 35, Issue 8, Page(s) 3322–3326

Language	English
Publishing date	1987-04-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	209769-2
ISSN	0556-2791 ; 2469-9926 ; 1050-2947
ISSN	0556-2791 ; 2469-9926 ; 1050-2947
DOI	10.1103/physreva.35.3322
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Multielectron excitations in x-ray-absorption spectra of a-Si:H.

Filipponi / Bernieri / Mobilio

Physical review. B, Condensed matter

1988 Volume 38, Issue 5, Page(s) 3298–3304

Language	English
Publishing date	1988-08-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	209770-9
ISSN	1095-3795 ; 1550-235X ; 0163-1829 ; 2469-9950 ; 1098-0121 ; 0556-2805
ISSN (online)	1095-3795 ; 1550-235X
ISSN	0163-1829 ; 2469-9950 ; 1098-0121 ; 0556-2805
DOI	10.1103/physrevb.38.3298
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: Nanoseconds Timing System Based on IEEE 1588 FPGA Implementation

Pedretti, D. / Bellato, M. / Isocrate, R. / Bergnoli, A. / Brugnera, R. / Corti, D. / Corso, F. Dal / Galet, G. / Garfagnini, A. / Giaz, A. / Lippi, I. / Marini, F. / Andronico, G. / Antonelli, V. / Baldoncini, M. / Bernieri, E. / Brigatti, A. / Budano, A. / Buscemi, M. /

Bussino, S. / Caruso, R. / Chiesa, D. / Clementi, C. / Ding, X. F. / Dusini, S. / Fabbri, A. / Ford, R. / Formozov, A. / Giammarchi, M. / Grassi, M. / Insolia, A. / Lombardi, P. / Mantovani, F. / Mari, S. M. / Martellini, C. / Martini, A. / Meroni, E. / Miramonti, L. / Monforte, S. / Montini, P. / Montuschi, M. / Nastasi, M. / Ortica, F. / Paoloni, A. / Previtali, E. / Ranucci, G. / Re, A. C. / Ricci, B. / Romani, A. / Salamanna, G. / Sawy, F. H. / Settanta, G. / Sisti, M. / Sirignano, C. / Stanco, L. / Strati, V. / Verde, G.

2018

Abstract: Clock synchronization procedures are mandatory in most physical experiments where event fragments are readout by spatially dislocated sensors and must be glued together to reconstruct key parameters (e.g. energy, interaction vertex etc.) of the process ... ...

Abstract	Clock synchronization procedures are mandatory in most physical experiments where event fragments are readout by spatially dislocated sensors and must be glued together to reconstruct key parameters (e.g. energy, interaction vertex etc.) of the process under investigation. These distributed data readout topologies rely on an accurate time information available at the frontend, where raw data are acquired and tagged with a precise timestamp prior to data buffering and central data collecting. This makes the network complexity and latency, between frontend and backend electronics, negligible within upper bounds imposed by the frontend data buffer capability. The proposed research work describes an FPGA implementation of IEEE 1588 Precision Time Protocol (PTP) that exploits the CERN Timing, Trigger and Control (TTC) system as a multicast messaging physical and data link layer. The hardware implementation extends the clock synchronization to the nanoseconds range, overcoming the typical accuracy limitations inferred by computers Ethernet based Local Area Network (LAN). Establishing a reliable communication between master and timing receiver nodes is essential in a message-based synchronization system. In the backend electronics, the serial data streams synchronization with the global clock domain is guaranteed by an hardware-based finite state machine that scans the bit period using a variable delay chain and finds the optimal sampling point. The validity of the proposed timing system has been proved in point-to-point data links as well as in star topology configurations over standard CAT-5e cables. The results achieved together with weaknesses and possible improvements are hereby detailed. Comment: 8 pages, 14 figures, proceedings of 21st IEEE Real Time Conference Colonial Williamsburg 9-15 June 2018
Keywords	Computer Science - Networking and Internet Architecture
Subject code	006
Publishing date	2018-06-04
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: GIGJ: A Crustal Gravity Model of the Guangdong Province for Predicting the Geoneutrino Signal at the JUNO Experiment

Reguzzoni, M. / Rossi, L. / Baldoncini, M. / Callegari, I. / Poli, P. / Sampietro, D. / Strati, V. / Mantovani, F. / Andronico, G. / Antonelli, V. / Bellato, M. / Bernieri, E. / Brigatti, A. / Brugnera, R. / Budano, A. / Buscemi, M. / Bussino, S. / Caruso, R. / Chiesa, D. /

Corti, D. / Dal Corso, F. / Ding, X.F. / Dusini, S. / Fabbri, A. / Fiorentini, G. / Ford, R. / Formozov, A. / Galet, G. / Garfagnini, A. / Giammarchi, M. / Giaz, A. / Grassi, M. / Insolia, A. / Isocrate, R. / Lippi, I. / Longhitano, F. / Lo Presti, D. / Lombardi, P. / Malyshkin, Y. / Marini, F. / Mari, S.M. / Martellini, C. / Meroni, E. / Mezzetto, M. / Miramonti, L. / Monforte, S. / Montuschi, M. / Nastasi, M. / Ortica, F. / Paoloni, A. / Parmeggiano, S. / Pedretti, D. / Pelliccia, N. / Pompilio, R. / Previtali, E. / Ranucci, G. / Re, A.C. / Ricci, B. / Romani, A. / Saggese, P. / Salamanna, G. / Sawy, F.H. / Settanta, G. / Sisti, M. / Sirignano, C. / Spinetti, M. / Stanco, L. / Verde, G. / Votano, L.

Journal of geophysical research. 2019 Apr., v. 124, no. 4

2019

Abstract: Gravimetric methods are expected to play a decisive role in geophysical modeling of the regional crustal structure applied to geoneutrino studies. GIGJ (GOCE Inversion for Geoneutrinos at JUNO) is a 3‐D numerical model constituted by ~46 × 10³ voxels of ... ...

Abstract	Gravimetric methods are expected to play a decisive role in geophysical modeling of the regional crustal structure applied to geoneutrino studies. GIGJ (GOCE Inversion for Geoneutrinos at JUNO) is a 3‐D numerical model constituted by ~46 × 10³ voxels of 50 × 50 × 0.1 km, built by inverting GOCE (Gravity field and steady‐state Ocean Circulation Explorer) gravimetric data over the 6° × 4° area centered at the JUNO (Jiangmen Underground Neutrino Observatory) experiment, currently under construction in the Guangdong Province (China). The a priori modeling is based on the adoption of deep seismic sounding profiles, receiver functions, teleseismic P wave velocity models, and Moho depth maps, according to their own accuracy and spatial resolution. The inversion method allowed for integrating GOCE data with the a priori information and some regularization conditions through a Bayesian approach and a stochastic optimization. GIGJ fits the highly accurate and homogeneously distributed GOCE gravity data with a ~1 mGal standard deviation of the residuals, compatible with the observation accuracy. GIGJ provides a site‐specific subdivision of the crustal layers masses, of which uncertainties include estimation errors, associated to the gravimetric solution, and systematic uncertainties, related to the adoption of a fixed sedimentary layer. A consequence of this local rearrangement of the crustal layer thicknesses is a ~21% reduction and a ~24% increase of the middle and lower crust geoneutrino signal, respectively. The geophysical uncertainties of geoneutrino signals at JUNO produced by unitary uranium and thorium abundances distributed in the upper, middle, and lower crust are reduced by 77%, 55%, and 78%, respectively. The numerical model is available at this site (http://www.fe.infn.it/radioactivity/GIGJ).
Keywords	Bayesian theory ; geophysics ; gravity ; mathematical models ; research ; standard deviation ; thorium ; uranium ; China
Language	English
Dates of publication	2019-04
Size	p. 4231-4249.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ISSN	2169-9313
DOI	10.1029/2018JB016681
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online: Distillation and stripping pilot plants for the JUNO neutrino detector

Lombardi, P. / Montuschi, M. / Formozov, A. / Brigatti, A. / Parmeggiano, S. / Pompilio, R. / Depnering, W. / Franke, S. / Gaigher, R. / Joutsenvaara, J. / Mengucci, A. / Meroni, E. / Steiger, H. / Mantovani, F. / Ranucci, G. / Andronico, G. / Antonelli, V. / Baldoncini, M. / Bellato, M. /

Bernieri, E. / Brugnera, R. / Budano, A. / Buscemi, M. / Bussino, S. / Caruso, R. / Chiesa, D. / Clementi, C. / Corti, D. / Corso, F. Dal / Ding, X. F. / Dusini, S. / Fabbri, A. / Fiorentini, G. / Ford, R. / Galet, G. / Garfagnini, A. / Giammarchi, M. / Giaz, A. / Grassi, M. / Insolia, A. / Isocrate, R. / Lippi, I. / Malyshkin, Y. / Mari, S. M. / Marini, F. / Martellini, C. / Martini, A. / Mezzetto, M. / Miramonti, L. / Monforte, S. / Montini, P. / Nastasi, M. / Ortica, F. / Paoloni, A. / Pedretti, D. / Pelliccia, N. / Previtali, E. / Re, A. C. / Ricci, B. / Riondino, D. / Romani, A. / Saggese, P. / Salamanna, G. / Sawy, F. H. / Settanta, G. / Sisti, M. / Sirignano, C. / Stanco, L. / Strati, V. / Verde, G. / Votano, L.

design, operations and reliability

2019

Abstract: This paper describes the design, construction principles and operations of the distillation and stripping pilot plants tested at the Daya Bay Neutrino Laboratory, with the perspective to adapt this processes, system cleanliness and leak-tightness to the ... ...

Abstract	This paper describes the design, construction principles and operations of the distillation and stripping pilot plants tested at the Daya Bay Neutrino Laboratory, with the perspective to adapt this processes, system cleanliness and leak-tightness to the final full scale plants that will be used for the purification of the liquid scintillator used in the JUNO neutrino detector. The main goal of these plants is to remove radio impurities from the liquid scintillator while increasing its optical attenuation length. Purification of liquid scintillator will be performed with a system combining alumina oxide, distillation, water extraction and steam (or N2 gas) stripping. Such a combined system will aim at obtaining a total attenuation length greater than 20 m at 430 nm, and a bulk radiopurity for 238U and 232Th in the 10-15 to 10-17 g/g range. The pilot plants commissioning and operation have also provided valuable information on the degree of reliability of their main components, which will be particularly useful for the design of the final full scale purification equipment for the JUNO liquid scintillator. This paper describe two of the five pilot plants since the Alumina Column, Fluor mixing and the Water Extraction plants are in charge of the Chinese part of the collaboration.
Keywords	Physics - Instrumentation and Detectors
Subject code	621
Publishing date	2019-02-14
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Search for Lepton-Flavor-Violating τ Decays to a Lepton and an Invisible Boson at Belle II.

Adachi, I / Adamczyk, K / Aggarwal, L / Ahmed, H / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Aushev, T / Aushev, V / Bae, H / Bahinipati, S / Bambade, P / Banerjee, Sw / Baudot, J / Bauer, M / Baur, A / Beaubien, A /

Becker, J / Behera, P K / Bennett, J V / Bernieri, E / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhuyan, B / Bianchi, F / Bilka, T / Bilokin, S / Biswas, D / Bodrov, D / Bolz, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Cecchi, C / Chang, M-C / Chang, P / Cheaib, R / Cheema, P / Chekelian, V / Chen, Y Q / Cheon, B G / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Cho, S-J / Choi, S-K / Choudhury, S / Cinabro, D / Corona, L / Cunliffe, S / Das, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dey, S / De Yta-Hernandez, A / Dhamija, R / Di Canto, A / Di Capua, F / Dingfelder, J / Doležal, Z / Domínguez Jiménez, I / Dong, T V / Dorigo, M / Dort, K / Dossett, D / Dreyer, S / Dubey, S / Dujany, G / Ecker, P / Eliachevitch, M / Epifanov, D / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finck, C / Finocchiaro, G / Flood, K / Fodor, A / Forti, F / Fulsom, B G / Gabrielli, A / Ganiev, E / Garcia-Hernandez, M / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Goldenzweig, P / Gradl, W / Granderath, S / Graziani, E / Greenwald, D / Gruberová, Z / Gu, T / Gudkova, K / Guilliams, J / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hohmann, M / Hsu, C-L / Humair, T / Iijima, T / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Ito, S / Itoh, R / Iwasaki, M / Jackson, P / Jacobs, W W / Jaffe, D E / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Junkerkalefeld, H / Kakuno, H / Kaliyar, A B / Kandra, J / Kang, K H / Kang, S / Karl, R / Karyan, G / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Koga, T / Kohani, S / Kojima, K / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Kraetzschmar, T M G / Križan, P / Krokovny, P / Kuhr, T / Kumar, J / Kumar, R / Kumara, K / Kunigo, T / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lam, T / Lanceri, L / Lange, J S / Laurenza, M / Lautenbach, K / Leboucher, R / Le Diberder, F R / Leitl, P / Lewis, P M / Li, C / Li, L K / Li, Y B / Libby, J / Lieret, K / Liptak, Z / Liu, Q Y / Liventsev, D / Longo, S / Lozar, A / Lueck, T / Luo, T / Lyu, C / Maggiora, M / Maiti, R / Maity, S / Manfredi, R / Manoni, E / Manthei, A / Marcello, S / Marinas, C / Martel, L / Martini, A / Martinov, T / Massaccesi, L / Masuda, M / Matsuda, T / Matsuoka, K / Matvienko, D / Maurya, S K / McKenna, J A / Meier, F / Merola, M / Metzner, F / Milesi, M / Miller, C / Miyabayashi, K / Mizuk, R / Mohanty, G B / Molina-Gonzalez, N / Moneta, S / Moser, H-G / Mrvar, M / Mussa, R / Nakamura, I / Nakamura, K R / Nakao, M / Nakayama, H / Nakazawa, Y / Narimani Charan, A / Naruki, M / Natochii, A / Nayak, L / Nayak, M / Nazaryan, G / Niebuhr, C / Nisar, N K / Nishida, S / Ogawa, S / Ono, H / Onuki, Y / Oskin, P / Pakhlov, P / Pakhlova, G / Paladino, A / Panta, A / Paoloni, E / Pardi, S / Parham, K / Park, H / Park, S-H / Paschen, B / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Pham, F / Piccolo, M / Piilonen, L E / Pinna Angioni, G / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Polat, L / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Rados, P / Raeuber, G / Raiz, S / Ramirez Morales, A / Reif, M / Reiter, S / Remnev, M / Ripp-Baudot, I / Rizzo, G / Robertson, S H / Rodríguez Pérez, D / Roney, J M / Rostomyan, A / Rout, N / Russo, G / Sanders, D A / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Savinov, V / Scavino, B / Schueler, J / Schwanda, C / Seino, Y / Selce, A / Senyo, K / Serrano, J / Sevior, M E / Sfienti, C / Shen, C P / Shi, X D / Shillington, T / Shiu, J-G / Shwartz, B / Sibidanov, A / Simon, F / Singh, J B / Skorupa, J / Sobie, R J / Soffer, A / Sokolov, A / Solovieva, E / Spataro, S / Spruck, B / Starič, M / Stefkova, S / Stottler, Z S / Stroili, R / Strube, J / Sue, Y / Sumihama, M / Sumisawa, K / Sutcliffe, W / Suzuki, S Y / Svidras, H / Takizawa, M / Tamponi, U / Tanida, K / Tanigawa, H / Tenchini, F / Thaller, A / Tiwary, R / Tonelli, D / Torassa, E / Toutounji, N / Trabelsi, K / Uchida, M / Ueda, I / Uematsu, Y / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Varvell, K E / Vinokurova, A / Vitale, L / Vobbilisetti, V / Wakeling, H M / Wang, E / Wang, M-Z / Wang, X L / Warburton, A / Watanabe, M / Watanuki, S / Welsch, M / Wessel, C / Wiechczynski, J / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Ye, H / Yelton, J / Yin, J H / Yook, Y M / Yoshihara, K / Yuan, C Z / Yusa, Y / Zani, L / Zhang, Y / Zhilich, V / Zhou, Q D / Zhou, X Y / Zhukova, V I / Žlebčík, R

Physical review letters

2023 Volume 130, Issue 18, Page(s) 181803

Abstract: We search for lepton-flavor-violating τ^{-}→e^{-}α and τ^{-}→μ^{-}α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of 62.8 fb^{-1}, produced by ... ...

Abstract	We search for lepton-flavor-violating τ^{-}→e^{-}α and τ^{-}→μ^{-}α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of 62.8 fb^{-1}, produced by the SuperKEKB collider and collected with the Belle II detector. We search for an excess in the lepton-energy spectrum of the known τ^{-}→e^{-}ν[over ¯]_{e}ν_{τ} and τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ} decays. We report 95% confidence-level upper limits on the branching-fraction ratio B(τ^{-}→e^{-}α)/B(τ^{-}→e^{-}ν[over ¯]_{e}ν_{τ}) in the range (1.1-9.7)×10^{-3} and on B(τ^{-}→μ^{-}α)/B(τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ}) in the range (0.7-12.2)×10^{-3} for α masses between 0 and 1.6 GeV/c^{2}. These results provide the most stringent bounds on invisible boson production from τ decays.
Language	English
Publishing date	2023-03-03
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.130.181803
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic B-Meson Decays at Belle II.

Aggarwal, L / Ahmed, H / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Atmacan, H / Aushev, T / Aushev, V / Bae, H / Bahinipati, S / Bambade, P / Banerjee, Sw / Bansal, S / Barrett, M / Baudot, J / Bauer, M / Baur, A /

Beaubien, A / Becker, J / Bennett, J V / Bernieri, E / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhardwaj, V / Bhuyan, B / Bianchi, F / Bilka, T / Bilokin, S / Biswas, D / Bodrov, D / Borah, J / Bozek, A / Bračko, M / Briere, R A / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Cecchi, C / Cerasoli, J / Chang, M-C / Cheaib, R / Cheema, P / Chekelian, V / Cheon, B G / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Cho, S-J / Choi, S-K / Choudhury, S / Cochran, J / Corona, L / Cunliffe, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dhamija, R / Di Capua, F / Dingfelder, J / Doležal, Z / Dong, T V / Dorigo, M / Dossett, D / Dreyer, S / Dubey, S / Dujany, G / Ecker, P / Eliachevitch, M / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finocchiaro, G / Fodor, A / Forti, F / Frey, A / Fulsom, B G / Gabrielli, A / Ganiev, E / Garcia-Hernandez, M / Gaudino, G / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Goldenzweig, P / Gradl, W / Grammatico, T / Granderath, S / Graziani, E / Gruberová, Z / Gu, T / Gudkova, K / Halder, S / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Hedges, M T / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hohmann, M / Hsu, C-L / Iijima, T / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Ito, S / Itoh, R / Iwasaki, M / Jacobs, W W / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Junkerkalefeld, H / Kaleta, M / Kaliyar, A B / Karyan, G / Kawasaki, T / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kinoshita, K / Kodyš, P / Kohani, S / Kojima, K / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Križan, P / Krokovny, P / Kumar, J / Kumar, R / Kumara, K / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lange, J S / Laurenza, M / Leboucher, R / Le Diberder, F R / Levit, D / Lewis, P M / Li, L K / Libby, J / Liptak, Z / Liu, Q Y / Liu, Z Q / Liventsev, D / Longo, S / Lueck, T / Lyu, C / Ma, Y / Maggiora, M / Maharana, S P / Maiti, R / Maity, S / Manfredi, R / Manoni, E / Manthei, A C / Mantovano, M / Marinas, C / Martel, L / Martellini, C / Martini, A / Massaccesi, L / Masuda, M / Matsuoka, K / Matvienko, D / Maurya, S K / McKenna, J A / Meier, F / Merola, M / Metzner, F / Milesi, M / Miller, C / Miyabayashi, K / Mizuk, R / Mohanty, G B / Moneta, S / Mrvar, M / Mussa, R / Nakamura, I / Nakamura, K R / Nakao, M / Nakazawa, Y / Narimani Charan, A / Naruki, M / Narwal, D / Natochii, A / Nayak, L / Nazaryan, G / Nisar, N K / Nishida, S / Ono, H / Onuki, Y / Oskin, P / Pakhlov, P / Pakhlova, G / Paladino, A / Panta, A / Pardi, S / Park, H / Park, J / Paschen, B / Passeri, A / Patra, S / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Piilonen, L E / Pinna Angioni, G / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Polat, L / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Rados, P / Raeuber, G / Reif, M / Reiter, S / Ripp-Baudot, I / Rizzo, G / Rizzuto, L B / Rocchetti, P / Roney, J M / Rostomyan, A / Rout, N / Sanders, D A / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Scavino, B / Schwanda, C / Seino, Y / Selce, A / Senyo, K / Sevior, M E / Sfienti, C / Shan, W / Sharma, C / Shen, C P / Shillington, T / Shiu, J-G / Simon, F / Singh, J B / Skorupa, J / Sobie, R J / Soffer, A / Sokolov, A / Solovieva, E / Spataro, S / Spruck, B / Starič, M / Stefkova, S / Stroili, R / Sue, Y / Sumihama, M / Sutcliffe, W / Suzuki, S Y / Svidras, H / Takizawa, M / Tamponi, U / Tanida, K / Taniguchi, N / Tenchini, F / Tiwary, R / Tonelli, D / Torassa, E / Trabelsi, K / Tsaklidis, I / Ueda, I / Uematsu, Y / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Urquijo, P / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Varvell, K E / Vinokurova, A / Vismaya, V S / Vitale, L / Vossen, A / Wallner, S / Wang, E / Wang, M-Z / Wang, X L / Warburton, A / Watanabe, M / Watanuki, S / Welsch, M / Wessel, C / Won, E / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Ye, H / Yin, J H / Yook, Y M / Yoshihara, K / Zhai, Y / Zhang, Y / Zhilich, V / Zhou, Q D / Zhou, X Y / Zhukova, V I / Žlebčík, R

Physical review letters

2023 Volume 131, Issue 5, Page(s) 51804

Abstract: We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(X_{e/μ})=B(B→Xeν)/B(B→Xμν), a precision test of electron-muon universality, using data corresponding to 189 fb^{-1} from electron-positron ... ...

Abstract	We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(X_{e/μ})=B(B→Xeν)/B(B→Xμν), a precision test of electron-muon universality, using data corresponding to 189 fb^{-1} from electron-positron collisions collected with the Belle II detector. In events where the partner B meson is fully reconstructed, we use fits to the lepton momentum spectra above 1.3 GeV/c to obtain R(X_{e/μ})=1.007±0.009(stat)±0.019(syst), which is the most precise lepton-universality test of its kind and agrees with the standard-model expectation.
Language	English
Publishing date	2023-08-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.051804
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Observation of e^{+}e^{-}→ωχ_{bJ}(1P) and Search for X_{b}→ωϒ(1S) at sqrt[s] near 10.75 GeV.

Adachi, I / Aggarwal, L / Ahmed, H / Aihara, H / Akopov, N / Aloisio, A / Anh Ky, N / Asner, D M / Aushev, T / Aushev, V / Bae, H / Bambade, P / Banerjee, Sw / Baudot, J / Bauer, M / Beaubien, A / Becker, J / Behera, P K / Bennett, J V /

Bernieri, E / Bernlochner, F U / Bertacchi, V / Bertemes, M / Bertholet, E / Bessner, M / Bettarini, S / Bhuyan, B / Bianchi, F / Bilka, T / Biswas, D / Bodrov, D / Bolz, A / Borah, J / Bozek, A / Bračko, M / Branchini, P / Browder, T E / Budano, A / Bussino, S / Campajola, M / Cao, L / Casarosa, G / Chang, M-C / Cheema, P / Chekelian, V / Chen, Y Q / Chilikin, K / Chirapatpimol, K / Cho, H-E / Cho, K / Cho, S-J / Choi, S-K / Choudhury, S / Cinabro, D / Corona, L / Cunliffe, S / Das, S / Dattola, F / De La Cruz-Burelo, E / De La Motte, S A / De Nardo, G / De Nuccio, M / De Pietro, G / de Sangro, R / Destefanis, M / Dey, S / De Yta-Hernandez, A / Dhamija, R / Di Canto, A / Di Capua, F / Doležal, Z / Domínguez Jiménez, I / Dong, T V / Dorigo, M / Dort, K / Dreyer, S / Dubey, S / Dujany, G / Eliachevitch, M / Feichtinger, P / Ferber, T / Ferlewicz, D / Fillinger, T / Finocchiaro, G / Fodor, A / Forti, F / Fulsom, B G / Ganiev, E / Gaur, V / Gaz, A / Gellrich, A / Ghevondyan, G / Giordano, R / Giri, A / Glazov, A / Gobbo, B / Godang, R / Goldenzweig, P / Granderath, S / Graziani, E / Greenwald, D / Gu, T / Guan, Y / Gudkova, K / Guilliams, J / Hara, T / Hayasaka, K / Hayashii, H / Hazra, S / Hearty, C / Heredia de la Cruz, I / Hernández Villanueva, M / Hershenhorn, A / Higuchi, T / Hill, E C / Hirata, H / Hohmann, M / Hsu, C-L / Iijima, T / Inami, K / Inguglia, G / Ipsita, N / Ishikawa, A / Ito, S / Iwasaki, M / Jackson, P / Jacobs, W W / Jaffe, D E / Jang, E-J / Ji, Q P / Jia, S / Jin, Y / Joo, K K / Junkerkalefeld, H / Kaliyar, A B / Kang, K H / Karl, R / Karyan, G / Ketter, C / Kiesling, C / Kim, C-H / Kim, D Y / Kim, K-H / Kim, Y-K / Kindo, H / Kodyš, P / Koga, T / Kohani, S / Kojima, K / Konno, T / Korobov, A / Korpar, S / Kovalenko, E / Kowalewski, R / Kraetzschmar, T M G / Križan, P / Krokovny, P / Kumar, R / Kumara, K / Kunigo, T / Kuzmin, A / Kwon, Y-J / Lacaprara, S / Lam, T / Lanceri, L / Lange, J S / Laurenza, M / Lautenbach, K / Leboucher, R / Lewis, P M / Li, C / Li, L K / Libby, J / Lieret, K / Liptak, Z / Liu, Q Y / Liventsev, D / Longo, S / Lozar, A / Lueck, T / Lyu, C / Maggiora, M / Maiti, R / Manfredi, R / Manoni, E / Marcello, S / Marinas, C / Martel, L / Martini, A / Martinov, T / Massaccesi, L / Masuda, M / Matsuoka, K / Maurya, S K / McKenna, J A / Merola, M / Metzner, F / Milesi, M / Miller, C / Miyabayashi, K / Mizuk, R / Molina-Gonzalez, N / Moneta, S / Moser, H-G / Mrvar, M / Mussa, R / Nakamura, I / Nakao, M / Nakazawa, Y / Narimani Charan, A / Naruki, M / Natkaniec, Z / Natochii, A / Nayak, L / Nayak, M / Nazaryan, G / Nisar, N K / Ogawa, S / Ono, H / Onuki, Y / Oskin, P / Paladino, A / Panta, A / Paoloni, E / Pardi, S / Park, H / Park, S-H / Paschen, B / Passeri, A / Paul, S / Pedlar, T K / Peruzzi, I / Peschke, R / Pestotnik, R / Piccolo, M / Piilonen, L E / Podesta-Lerma, P L M / Podobnik, T / Pokharel, S / Polat, L / Praz, C / Prell, S / Prencipe, E / Prim, M T / Purwar, H / Rad, N / Raiz, S / Ramirez Morales, A / Reif, M / Reiter, S / Remnev, M / Ripp-Baudot, I / Rizzo, G / Robertson, S H / Roney, J M / Rostomyan, A / Rout, N / Russo, G / Sanders, D A / Sandilya, S / Sangal, A / Santelj, L / Sato, Y / Savinov, V / Scavino, B / Schueler, J / Schwanda, C / Seino, Y / Selce, A / Senyo, K / Serrano, J / Sevior, M E / Sfienti, C / Shen, C P / Shi, X D / Shillington, T / Sibidanov, A / Singh, J B / Skorupa, J / Sobie, R J / Soffer, A / Solovieva, E / Spataro, S / Starič, M / Stefkova, S / Stottler, Z S / Stroili, R / Sue, Y / Sumihama, M / Sumisawa, K / Sutcliffe, W / Suzuki, S Y / Svidras, H / Takizawa, M / Tanida, K / Tanigawa, H / Tenchini, F / Thaller, A / Tiwary, R / Tonelli, D / Torassa, E / Toutounji, N / Trabelsi, K / Uchida, M / Ueda, I / Uematsu, Y / Uglov, T / Unger, K / Unno, Y / Uno, K / Uno, S / Ushiroda, Y / Vahsen, S E / van Tonder, R / Varner, G S / Vinokurova, A / Vitale, L / Vobbilisetti, V / Wakeling, H M / Wang, E / Wang, M-Z / Warburton, A / Watanuki, S / Welsch, M / Wessel, C / Won, E / Xu, X P / Yabsley, B D / Yamada, S / Yan, W / Yang, S B / Ye, H / Yelton, J / Yin, J H / Yook, Y M / Yoshihara, K / Yuan, C Z / Zani, L / Zhang, Y / Zhou, X Y / Zhukova, V I / Žlebčík, R

Physical review letters

2023 Volume 130, Issue 9, Page(s) 91902

Abstract: We study the processes e^{+}e^{-}→ωχ_{bJ}(1P) (J=0, 1, or 2) using samples at center-of-mass energies sqrt[s]=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb^{-1} of integrated luminosity, respectively. These data were collected ... ...

Abstract	We study the processes e^{+}e^{-}→ωχ_{bJ}(1P) (J=0, 1, or 2) using samples at center-of-mass energies sqrt[s]=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb^{-1} of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the ϒ(4S) resonance. We report the first observation of ωχ_{bJ}(1P) signals at sqrt[s]=10.745 GeV. By combining Belle II data with Belle results at sqrt[s]=10.867 GeV, we find energy dependencies of the Born cross sections for e^{+}e^{-}→ωχ_{b1,b2}(1P) to be consistent with the shape of the ϒ(10753) state. These data indicate that the internal structures of the ϒ(10753) and ϒ(10860) states may differ. Including data at sqrt[s]=10.653 GeV, we also search for the bottomonium equivalent of the X(3872) state decaying into ωϒ(1S). No significant signal is observed for masses between 10.45 and 10.65 GeV/c^{2}.
Language	English
Publishing date	2023-02-24
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.130.091902
Database	MEDical Literature Analysis and Retrieval System OnLINE

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