First Observation of the Decay 
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 and a Measurement of 
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Aaij, R.; Beteta, C. Abellán; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Albero, A. Alfonso; Aliouche, Z.; Alkhazov, G.; Cartelle, P. Alvarez; Amato, S.; Amhis, Y.; An, L.; Anderlini, L.; Andreianov, A.; Andreotti, M.; Archilli, F.; Артамонов, А.; Artuso, M.; Arzymatov, K.; Aslanides, E.; Atzeni, M.; Audurier, B.; Bachmann, S.; Bachmayer, M.; Back, J. J.; Baker, S.; Rodríguez, P. Baladrón; Balagura, V.; Baldini, W.; Leite, J. Baptista; Barlow, R. J.; Barsuk, S.; Barter, W.; Bartolini, M.; Baryshnikov, F.; Basels, Jan-Marc; Bassi, G.; Batsukh, B.; Battig, A.; Bay, A.; Becker, Maik; Bedeschi, F.; Bediaga, I.; Beiter, A.; Belavin, V.; Belin, S.; Bellée, V.; Belous, K.; Belov, Ilia; Belyaev, I.; Bencivenni, G.; Ben-Haim, E.; Berezhnoy, A.; Bernet, R.; Berninghoff, D.; Bernstein, H. C.; Bertella, C.; Bertholet, E.; Bertolin, A.; Betancourt, C.; Betti, F.; Bettler, M. O.; Bezshyiko, Ia.; Bhasin, S.; Bhom, J.; Bian, L.; Bieker, M. S.; Bifani, S.; Billoir, P.; Birch, Matthew; Bishop, F. C. R.; Bizzeti, A.; Bjørn, M.; Blago, M. P.; Blake, T.; Blanc, F.; Blusk, S.; Bobulska, D.; Boelhauve, J. A.; García, O. Boente; Boettcher, T.; Boldyrev, A. S.; Bondar, A.; Bondar, N.; Borghi, S.; Borisyak, M.; Borsato, M.; Borsuk, J. T.; Bouchiba, Sonia Amina; Bowcock, T. J. V.; Boyer, A.; Bozzi, C.; Bradley, Matthew John; Braun, S.; Rodríguez, A. Brea; Brodski, M.; Brodzicka, J.; Gonzalo, A. Brossa; Brundu, D.; Buonaura, A.; Burr, C.; Bursche, A.; Butkevich, A.; Butter, J. S.; Buytaert, J.; Byczynski, W.; Cadeddu, S.; Cai, H.; Calabrese, R.; Calefice, Lukas; Diaz, L. Calero; Cali, S.; Calladine, R.; Calvi, M.; Gomez, M. Calvo; Magalhães, Patrícia Camargo; Camboni, A.; Campana, P.; Perez, D. H. Campora; Quezada, Angel Fernando Campoverde; Capelli, S.; Capriotti, L.; Carbone, A.; Carboni, G.; Cardinale, R.; Cardini, A.; Carli, I.; Carniti, P.; Carus, Leon David; Akiba, K. Carvalho; Vidal, A. Casais; Casse, G.; Cattaneo, M.; Cavallero, G.; Celani, S.; Cerasoli, J.; Chadwick, Abbie Jane; Chapman, M. G.; Charles, M.; Charpentier, Ph.; Chatzikonstantinidis, G.; Barajas, C. A. Chavez; Chefdeville, M.; Chen, C.; Chen, S.; Chernov, A.; Chitic, S.-G.; Chobanova, V.; Cholak, S.; Chrząszcz, M.; Chubykin, A.; Chulikov, V.; Ciambrone, P.; Cicala, M. F.; Vidal, X. Cid; Ciezarek, G.; Clarke, P. E. L.; Clemencic, M.; Cliff, H. V.; Closier, J.; Cobbledick, J. L.; Coco, V.; Coelho, J. A. B.; Cogan, J.; Cogneras, E.; Cojocariu, L.; Collins, P.; Colombo, T.; Congedo, L.; Contu, A.; Cooke, N.; Coombs, G.; Corti, G.; Sobral, C. M. Costa; Couturier, B.; Craik, D. C.; Crkovská, J.; Torres, M. Cruz; Currie, R.; Silva, C. L. Da; Dall’Occo, E.; Dalseno, J.; D’Ambrosio, C.; Danilina, A.; d’Argent, P.; Davis, A.; Francisco, O. De Aguiar; Bruyn, K. De; Capua, S. De; Cian, M. De; Miranda, J. M. De; Paula, L. De; Serio, M. De; Simone, D. De; Simone, P. De; Vries, J. A. de; Dean, C. T.; Dean, William L.; Décamp, D.; Buono, L. Del; Delaney, B.; Dembinski, H.-P.; Dendek, A.; Denysenko, V.; Деркач, Д.; Deschamps, O.; Desse, F.; Dettori, F.; Dey, B.; Nezza, P. Di; Didenko, S.; Maronas, L. Dieste; Dijkstra, H.; Dobishuk, V.; Donohoe, Amanda May; Dordei, F.; Reis, A. C. dos; Douglas, L.; Dovbnya, A.; Downes, Anthony Gavin; Dreimanis, K.; Dudek, M. W.; Dufour, L.; Duk, V.; Durante, P.; Durham, J. 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Garcia; Rosales, F. A. Garcia; Garrido, L.; Gaspar, C.; Geertsema, R. E.; Gerick, D.; Gerken, Louis Lenard; Gersabeck, E.; Gersabeck, M.; Gershon, T.; Gerstel, D.; Ghez, Ph.; Gibson, V.; Giovannetti, M.; Gioventù, A.; Gironell, P. Gironella; Giubega, L.; Giugliano, C.; Gizdov, K.; Gkougkousis, E. L.; Gligorov, V. V.; Göbel, C.; Golobardes, Elisabet; Golubkov, D.; Golutvin, A.; Gomes, A.; Fernández, Sergio Gómez; Abrantes, F. Goncalves; Goncerz, M.; Gong, Guanghua; Gorbounov, P. A.; Gorelov, I.; Gotti, C.; Говоркова, Е.; Grabowski, J. P.; Diaz, R. Graciani; Grammatico, T.; Cardoso, L. A. Granado; Graugés, E.; Graverini, E.; Graziani, G.; Grecu, A.; Greeven, Lex Marinus; Griffith, P.; Grillo, L.; Gromov, S.; Cazon, B. R. Gruberg; Gu, C.; Guarise, M.; Günther, P. A.; Gushchin, E.; Güth, A.; Guz, Yury; Gys, T.; Hadavizadeh, T.; Haefeli, G.; Haen, C.; Haimberger, Jakob; Halewood-leagas, T.; Hamilton, P. M.; Han, Q.; Han, X.; Hancock, T. H.; Hansmann-Menzemer, S.; Harnew, N.; Harrison, T.; Hasse, C.; Hatch, M.; He, J.; Hecker, M.; Heijhoff, K.; Heinicke, K.; Hennequin, A. M.; Hennessy, K.; Henry, L.; Heuel, J.; Hicheur, A.; Hill, D.; Hilton, M.; Hollitt, S. E.; Hu, J.; Hu, W.; Huang, Wenqian; Huang, X.; Hulsbergen, W.; Hunter, R. J.; Hushchyn, M.; Hutchcroft, D.; Hynds, D.; Ibis, P.; Idzik, M.; Ilin, D.; Ilten, P.; Inglessi, A.; Ishteev, Artur; Ившин, К.; Jacobsson, R.; Jakobsen, S.; Jans, E.; Jashal, B. K.; Jawahery, A.; Jevtic, V.; Jeżabek, M.; Jiang, Feng; John, M.; Johnson, D.; Jones, C. R.; Jones, Thomas Peter; Jost, B.; Jurik, N.; Kandybei, S.; Kang, Y.; Karacson, M.; Karpov, Maksim; Kazeev, N.; Keizer, F.; Kenzie, M.; Ketel, T.; Khanji, B.; Kharisova, A.; Kholodenko, S.; Kim, K. E.; Kirn, T.; Kirsebom, V. 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R.; Mauri, A.; Maurice, E.; Mauricio, J.; Mazurek, M.; McCann, M.; Mcconnell, L.; Mcgrath, Tamaki Holly; McNab, A.; McNulty, R.; Mead, James Vincent; Meadows, B.; Meaux, C.; Meier, G.; Meinert, N.; Melnychuk, D.; Meloni, S.; Merk, M.; Merli, A.; Garcia, L. Meyer; Mikhasenko, M.; Milanes, D. A.; Millard, E.; Milovanovic, Marko; Minard, M.-N.; Minzoni, L.; Mitchell, S. E.; Mitreska, B.; Mitzel, D. S.; Mödden, A.; Mohammed, Rizwaan Adeeb; Moise, R. D.; Mombächer, T.; Monroy, I. A.; Monteil, S.; Morandin, M.; Morello, G.; Morello, M. J.; Moroń, J.; Morris, A. B.; Morris, A. G.; Mountain, R.; Mu, H.; Muheim, F.; Mukherjee, M.; Mulder, M.; Müller, D.; Müller, K.; Murphy, C. H.; Murray, D.; Muzzetto, P.; Naik, P.; Nakada, T.; Nandakumar, R.; Nanut, T.; Nasteva, I.; Needham, M.; Neri, Ilaria; Neri, N.; Neubert, S.; Neufeld, N.; Newcombe, R.; Nguyen, T. D.; Nguyen-Mau, C.; Niel, E. M.; Nieswand, S.; Nikitin, N.; Nolte, N. S.; Nunez, C.; Obłąkowska-Mucha, A.; Obraztsov, V.; O’Hanlon, D. P.; Oldeman, R.; Olivares, Mario Edgardo; Onderwater, C. J. G.; Ossowska, A.; Goicochea, J. M. Otalora; Ovsiannikova, T.; Owen, P.; Oyanguren, A.; Pagare, B.; Pais, P.; Pajero, T.; Palano, A.; Palutan, M.; Pan, Y.; Panshin, G.; Papanestis, A.; Pappagallo, M.; Pappalardo, L. L.; Pappenheimer, C.; Parker, W.; Parkes, C.; Parkinson, C. J.; Passalacqua, B.; Passaleva, G.; Pastore, A.; Patel, M.; Patrignani, C.; Pawley, Christopher James; Pearce, A.; Pellegrino, A.; Altarelli, M. Pepe; Perazzini, S.; Pereima, D.; Perret, P.; Petridis, K.; Petrolini, A.; Petrov, A.; Petrucci, S.; Petruzzo, M.; Pham, Thi Thuy Hang; Philippov, A.; Pica, Lorenzo; Piccini, M.; Pietrzyk, B.; Pietrzyk, G.; Pili, M.; Pinci, D.; Pisani, F.; Piucci, A.; K, Resmi P.; Placinta, V.; Plews, J.; Casasús, M. Pló; Polci, F.; Lener, M. Poli; Poliakova, M.; Poluektov, A.; Polukhina, N.; Polyakov, I.; Polycarpo, E.; Pomery, G. 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doi:10.1103/physrevlett.126.081804

Cited by 41 publications

(19 citation statements)

References 29 publications

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“…These quantities not only depend on the penguin parameters a and θ, but also on an overall normalisation factor. Since we know the penguin parameters from the fit (51) to the CP asymmetries, combining them with the experimental measurements of the branching fractions can give us valuable insights into very difficult to calculate hadronic parameters associated with the normalisation factor (23). In particular, it allows us to determine a decay-specific effective colour-suppression factor.…”

Section: Hadronic Decay Benchmark Parametersmentioning

confidence: 99%

“…The expression in terms of the B 0 s → J/ψK 0 S penguin parameters and colour-suppression factor is analogous to equation (86). A first measurement of the B 0 s → K − + ν branching fraction was recently published by LHCb [51]. However, we will have to wait for a future update that includes a measurement of the differential branching fraction to calculate R K s .…”

Section: Semileptonic Decay Informationmentioning

confidence: 99%

See 1 more Smart Citation

In pursuit of new physics with Bd0→J/ψK0 and Bs0→J/ψϕ decays at the high-precision Frontier

Barel

Bruyn

Fleischer

et al. 2021

J. Phys. G: Nucl. Part. Phys.

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The decays B 0 d → J/ψK 0 S and B 0 s → J/ψφ play a key role for the determination of the B 0 q -B 0 q (q = d, s) mixing phases φ d and φ s , respectively. The theoretical precision of the extraction of these quantities is limited by doubly Cabibbo-suppressed penguin topologies, which can be included through control channels by means of the SU(3) flavour symmetry of strong interactions. Using the currently available data and a new simultaneous analysis, we discuss the state-of-the-art picture of these effects and include them in the extracted φ q values. We have a critical look at the standard model predictions of these phases and explore the room left for new physics. Considering future scenarios for the high-precision era of flavour physics, we illustrate that we may obtain signals for physics beyond the standard model with a significance well above five standard deviations. We also determine effective colour-suppression factors of B 0 d → J/ψK 0 , B 0 s → J/ψK 0 S and B 0 d → J/ψπ 0 decays, which serve as benchmarks for QCD calculations of the underlying decay dynamics, and present a new method using information from semileptonic B 0 d → π − + ν and B 0 s → K − + ν decays.

show abstract

Section: Hadronic Decay Benchmark Parametersmentioning

confidence: 99%

Section: Semileptonic Decay Informationmentioning

confidence: 99%

In pursuit of new physics with Bd0→J/ψK0 and Bs0→J/ψϕ decays at the high-precision Frontier

Barel

Bruyn

Fleischer

et al. 2021

J. Phys. G: Nucl. Part. Phys.

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show abstract

“…A measurement of the B 0 s → µ + µ − γ effective lifetime thus requires both a precise knowledge of the yield and of the di-muon mass distribution of the listed backgrounds. This is not unrealistic, for example a large sample of B 0 s → K − µ + ν µ decays has been recently seen at LHCb [84] and can be used to constrain its equivalent misidentified yield. The lifetime of this decay, being a flavour-specific decay, is precisely known.…”

Section: Experimental Outlook and Conclusionmentioning

confidence: 99%

On the effective lifetime of Bs → μμγ

Carvunis

Dettori

Gangal

et al. 2021

J. High Energ. Phys.

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We consider the $$ {B}_s^0 $$ B s 0 → μ+μ−γ effective lifetime, and the related CP-phase sensitive quantity $$ {A}_{{\Delta \Gamma}_s}^{\mu \mu \gamma} $$ A ΔΓ s μμγ , as a way to obtain qualitatively new insights on the current B-decay discrepancies. Through a fit comparing pre- to post-Moriond-2021 data we identify a few theory benchmark scenarios addressing these discrepancies, and featuring large CP violation in addition. We then explore the possibility of telling apart these scenarios with $$ {A}_{{\Delta \Gamma}_s}^{\mu \mu \gamma} $$ A ΔΓ s μμγ , once resonance-modeling and form-factor uncertainties are taken into account. We do so in both regions of low and high invariant di-lepton mass-squared q2. For low q2, we show how to shape the integration range in order to reduce the impact of the ϕ-resonance modelling on the $$ {A}_{{\Delta \Gamma}_s}^{\mu \mu \gamma} $$ A ΔΓ s μμγ prediction. For high q2, we find that the corresponding pollution from broad-charmonium resonances has a surprisingly small effect on $$ {A}_{{\Delta \Gamma}_s}^{\mu \mu \gamma} $$ A ΔΓ s μμγ . This is due to a number of cancellations, that can be traced back to the complete dominance of semi-leptonic operator contributions for high q2 — at variance with low q2 — and to $$ {A}_{{\Delta \Gamma}_s}^{\mu \mu \gamma} $$ A ΔΓ s μμγ behaving like a ratio-of-amplitudes observable. Our study suggests that $$ {A}_{{\Delta \Gamma}_s}^{\mu \mu \gamma} $$ A ΔΓ s μμγ is — especially at high q2 — a potentially valuable probe of short-distance CP-violating effects in the very same Wilson coefficients that are associated to current b → s discrepancies. Its discriminating power, however, relies on progress in form-factor uncertainties. Interestingly, high q2 is the region where $$ {B}_s^0 $$ B s 0 → μ+μ−γ is already being accessed experimentally, and the region where form factors are more accessible through non-perturbative QCD methods.

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“…[88]. The first experimental determination of the ratio of branching fractions of these modes has been reported while this paper was in writing [89]. In that paper the authors indeed make distinction between the low and high q 2 regions, but with q 2 min = 7 GeV 2 that is perhaps too low.…”

Section: Jhep05(2021)175mentioning

confidence: 84%

New physics effects in leptonic and semileptonic decays

Bečirević

Jaffredo

Peñuelas

et al. 2021

J. High Energ. Phys.

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We discuss the possibilities of extracting the constraints on New Physics by using the current data on the leptonic and semileptonic decays of pseudoscalar mesons. In doing so we use a general low energy Lagrangian that besides the vector and axial operators also includes the (pseudo-)scalar and tensor ones. In obtaining constraints on New Physics couplings, we combine the experimental information concerning several decay modes with the accurate and precise lattice QCD results for the hadronic matrix elements. We propose to study new observables that can be extracted from the angular analysis of the semileptonic decays and discuss their values both in the Standard Model and in some specific scenarios of physics beyond the Standard Model.

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First Observation of the Decay Bs0→K−μ+νμ and a Measurement of

Cited by 41 publications

References 29 publications

In pursuit of new physics with Bd0→J/ψK0 and Bs0→J/ψϕ decays at the high-precision Frontier

In pursuit of new physics with Bd0→J/ψK0 and Bs0→J/ψϕ decays at the high-precision Frontier

On the effective lifetime of Bs → μμγ

New physics effects in leptonic and semileptonic decays

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