Search for the rare decays<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mi>π</mml:mi><mml:msup><mml:mi>ℓ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>ℓ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:mi>η</mml:mi><mml:msup><mml:mi>ℓ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:

Lees, J. P.; Poireau, V.; Tisserand, V.; Graugés, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Koch, H.; Schroeder, T. Vazquez; Hearty, C.; Mattison, T. S.; McKenna, J. A.; So, R. Y.; Khan, A.; Blinov, V.; Buzykaev, A. R.; Дружинин, В. П.; Golubev, V. B.; Kravchenko, E. A.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu; Yushkov, A. N.; Kirkby, D.; Lankford, A. J.; Mandelkern, M.; Dey, B.; Gary, J. W.; Long, O. R.; Vitug, G. M.; Campagnari, C.; Sevilla, M. Franco; Hong, T. M.; Kovalskyi, D.; Richman, J.; West, C.; Eisner, A. M.; Lockman, W. S.; Martínez, A. J.; Schumm, B. A.; Seiden, A.; Chao, D. S.; Cheng, C. H.; Echenard, B.; Flood, K. T.; Hitlin, D. G.; Ongmongkolkul, P.; Porter, F. C.; Andreassen, R.; Huard, Z.; Meadows, B.; Sokoloff, M. D.; Sun, L.; Bloom, P. C.; Ford, W. T.; Gaz, A.; Nauenberg, U.; Smith, J. G.; Wagner, S. R.; Ayad, R.; Toki, W. H.; Spaan, B.; Schubert, K. R.; Schwierz, R.; Bernard, D.; Verderi, M.; Playfer, S.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Piemontese, L.; Santoro, V.; Baldini-Ferroli, R.; Calcaterra, A.; Sangro, R. de; Finocchiaro, G.; Martellotti, S.; Patterí, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Vetere, M. Lo; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Bhuyan, B.; Prasad, V.; Morii, M.; Adametz, A.; Uwer, U.; Lacker, H.; Dauncey, P. D.; Mallik, U.; Chen, C.; Cochran, J.; Meyer, W. T.; Prell, S.; Rubin, A. E.; Gritsan, A. V.; Arnaud, N.; Davier, M.; Деркач, Д.; Grosdidier, G.; Diberder, F. Le; Lutz, A. M.; Malaescu, B.; Roudeau, P.; Stocchi, A.; Wormser, G.; Lange, D.; Wright, D. M.; Coleman, J. P.; Fry, J. R.; Gabathuler, E.; Hutchcroft, D.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Lodovico, F. Di; Sacco, R.; Cowan, G.; Bougher, J.; Davis, C. L.; Denig, A.; Fritsch, M.; Gradl, W.; Grießinger, K.; Hafner, A.; Prencipe, E.; Barlow, R. J.; Lafferty, G. D.; Behn, E.; Cenci, R.; Hamilton, B.; Jawahery, A.; Roberts, D. A.; Cowan, R.; Dujmić, D.; Sciolla, G.; Cheaib, R.; Patel, P. M.; Robertson, S. H.; Biassoni, P.; Neri, N.; Palombo, F.; Cremaldi, L.; Godang, R.; Sonnek, P.; Summers, D. J.; Nguyen, X.; Simard, M.; Taras, P.; Nardo, G. De; Monorchio, D.; Onorato, G.; Sciacca, C.; Martinelli, M.; Raven, G.; Jessop, C. P.; LoSecco, J. M.; Honscheid, K.; Kass, R.; Brau, J. E.; Frey, R.; Sinev, N. B.; Strom, D.; Torrence, E.; Feltresi, E.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben-Haim, E.; Bomben, M.; Bonneaud, G. R.; Briand, H.; Calderini, G.; Chauveau, J.; Leruste, Ph; Marchiori, G.; Ocariz, J.; Sitt, S.; Biasini, M.; Manoni, E.; Pacetti, S.; Rossi, A.; Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Pérez, A.; Rizzo, G.; Walsh, J.; Pegna, D. Lopes; Olsen, J.; Smith, A. J. S.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Gioi, L. Li; Piredda, G.; Bünger, C.; Grünberg, O.; Hartmann, T.; Leddig, T.; Voß, C.; Waldi, R.; Adye, T.; Olaiya, E. O.; Wilson, F. F.; Emery, S.; Monchenault, G. Hamel de; Vasseur, G.; Yèche, Ch; Anulli, F.; Aston, D.; Bard, D. J.; Benitez, J. F.; Cartaro, C.; Convery, M. R.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Ebert, M.; Field, R. C.; Fulsom, B. G.; Gabareen, A. M.; Graham, M. T.; Hast, C.; Innes, W. R.; Kim, P.; Kocian, M.; Leith, D. W. G. S.; Lewis, P.; Lindemann, D.; Lindquist, B.; Luitz, S.; Lüth, V.; Lynch, H. L.; MacFarlane, D. B.; Muller, D. R.; Neal, H. A.; Nelson, S.; Перл, М.; Pulliam, T.; Ratcliff, B. N.; Roodman, A.; Salnikov, A. A.; Schindler, R. H.; Snyder, A.; Su, D.; Sullivan, M. K.; Va’vra, J.; Wagner, A. P.; Wang, W. F.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Ziegler, V.; Park, W.; Purohit, M.; White, R. M.; Wilson, J. R.; Randle-Conde, A.; Sekula, S. J.; Bellis, M.; Burchat, P. R.; Miyashita, T. S.; Puccio, E. M. T.; Alam, M. S.; Ernst, J.; Gorodeisky, R.; Guttman, N.; Peimer, D. R.; Soffer, A.; Spanier, S.; Ritchie, J. L.; Ruland, A. M.; Schwitters, R. F.; Wray, B. C.; Izen, J. M.; Lou, X.; Bianchi, F.; Mori, F. De; Filippi, A.; Gamba, D.; Zambito, S.; Lanceri, L.; Vitale, L.; Martínez-Vidal, F.; Oyanguren, A.; Villanueva-Pérez, P.; Ahmed, H.; Albert, J.; Banerjee, S.; Bernlochner, F. U.; Choi, H. H. F.; King, G. J.; Kowalewski, R.; Lewczuk, M. J.; Lueck, T.; Nugent, I. M.; Roney, J. M.; Sobie, R.; Tasneem, N.; Gershon, T.; Harrison, P. F.; Latham, T.; Band, H. R.; Dasu, S.; Pan, Y. B.; Prepost, R.; Wu, S. L.

doi:10.1103/physrevd.88.032012

Cited by 11 publications

(3 citation statements)

References 40 publications

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“…For the other channels, only the upper bounds are provided in PDG. Further, Belle [90] and BABAR [91,92] collaborations have also performed the search for B 0 → π 0 ℓ + ℓ − with ℓ = e and µ and our results are well within the upper limit. For B + → ρ + ℓ + ℓ − and B 0 → (ρ 0 , ω)ℓ + ℓ − channels, the experimental data is yet to be reported.…”

Section: --supporting

confidence: 74%

Rare $b \to d$ decays in covariant confined quark model

Soni,

Issadykov,

Gadaria

et al. 2020

Preprint

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In this article, we study the rare decays corresponding to b → d transition in the framework of covariant confined quark model. The transition form factors for the channels B +(0) → (π +(0) , ρ +(0) , ω) and B 0 s → K ( * )0 are computed in the entire dynamical range of momentum transfer squared. Using the form factors, we compute the branching fractions of the rare decays and our results are found to be matching well with the experimental data. We also compute the ratios of the branching fractions of the b → s to b → d rare decays using the inputs from previous papers on this model.Further, using the form factors, model dependent and independent parameters, we also compute different other physical observables such as forward backward asymmetry, longitudinal polarization and angular observables in the entire q 2 range as well as in q 2 bins [0.1 -0.98] GeV 2 and [1.1 -6]GeV 2 . We also compare our findings with different theoretical predictions.

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Section: --supporting

confidence: 74%

Rare $b \to d$ decays in covariant confined quark model

Soni,

Issadykov,

Gadaria

et al. 2020

Preprint

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show abstract

“…The LHCb experiment recently made the first observation of B + → π + µ + µ − [11], while the B-factories have set limits on the e + e − and τ + τ − channels [12][13][14]. Below we present the first calculations of B → π + − ( = e, µ, τ ) observables in the Standard Model using form factors with fully controlled uncertainties.…”

mentioning

confidence: 99%

B→πllForm Factors for New Physics Searches from Lattice QCD

et al. 2015

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The rare decay B → πl þ l − arises from b → d flavor-changing neutral currents and could be sensitive to physics beyond the standard model. Here, we present the first ab initio QCD calculation of the B → π tensor form factor f T . Together with the vector and scalar form factors f þ and f 0 from our companion work [J. A. Bailey et al., Phys. Rev. D 92, 014024 (2015)], these parametrize the hadronic contribution to B → π semileptonic decays in any extension of the standard model. We obtain the total branching ratio BRðB þ → π þ μ þ μ − Þ ¼ 20.4ð2.1Þ × 10 −9 in the standard model, which is the most precise theoretical determination to date, and agrees with the recent measurement from the LHCb experiment [R. Aaij et al., J. High Energy Phys. 12 (2012) Motivation.-Hadron decays that proceed through flavor-changing neutral currents may be sensitive to new physics, because their leading standard model contributions are loop suppressed. Here we study the semileptonic decay B → πl þ l − , which proceeds through a b → d transition. Hadronic effects in this decay are parametrized by three form factors. In this Letter, we present the first ab initio QCD calculation of the tensor form factor f T , based on lattice-QCD work that also yielded the vector and scalar form factors, f þ and f 0 [1]. Lattice QCD has several advantages over other approaches to the form factors [2][3][4][5][6][7][8][9], particularly in providing a path to controlled uncertainties that can be systematically reduced [10].The LHCb experiment recently made the first observation of B þ → π þ μ þ μ − [11], while the B factories have set limits on the e þ e − and τ þ τ − channels [12][13][14]. Below we

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“…Other than that, upper limits on exclusive decays include Belle constraint Br(B + → π + + − ) < 4.9 • 10 −8 (90% C.L.) [109] and BaBar result [110]:…”

Section: Jhep10(2021)079mentioning

confidence: 99%

Are the CKM anomalies induced by vector-like quarks? Limits from flavor changing and Standard Model precision tests

Belfatto

Berezhiani

2021

J. High Energ. Phys.

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Recent high precision determinations of Vus and Vud indicate towards anomalies in the first row of the CKM matrix. Namely, determination of Vud from beta decays and of Vus from kaon decays imply a violation of first row unitarity at about 3σ level. Moreover, there is tension between determinations of Vus obtained from leptonic Kμ2 and semileptonic Kℓ3 kaon decays. These discrepancies can be explained if there exist extra vector-like quarks at the TeV scale, which have large enough mixings with the lighter quarks. In particular, extra vector-like weak singlets quarks can be thought as a solution to the CKM unitarity problem and an extra vector-like weak doublet can in principle resolve all tensions. The implications of this kind of mixings are examined against the flavour changing phenomena and SM precision tests. We consider separately the effects of an extra down-type isosinglet, up-type isosinglet and an isodoublet containing extra quarks of both up and down type, and determine available parameter spaces for each case. We find that the experimental constraints on flavor changing phenomena become more stringent with larger masses, so that the extra species should have masses no more than few TeV. Moreover, only one type of extra multiplet cannot entirely explain all the discrepancies, and some their combination is required, e.g. two species of isodoublet, or one isodoublet and one (up or down type) isosinglet. We show that these scenarios are testable with future experiments. Namely, if extra vector-like quarks are responsible for CKM anomalies, then at least one of them should be found at scale of few TeV, and anomalous weak isospin violating Z-boson couplings with light quarks should be detected if the experimental precision on Z hadronic decay rate is improved by a factor of 2 or so.

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Search for the rare decaysB→πℓ+ℓ−andB0→ηℓ+

Cited by 11 publications

References 40 publications

Rare $b \to d$ decays in covariant confined quark model

Rare $b \to d$ decays in covariant confined quark model

B→πllForm Factors for New Physics Searches from Lattice QCD

Are the CKM anomalies induced by vector-like quarks? Limits from flavor changing and Standard Model precision tests

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