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 decays with semileptonic tagging at Belle

Grygier, J.; Goldenzweig, P.; Heck, M.; Adachi, I.; Aihara, H.; Said, S. Al; Asner, D. M.; Aushev, T.; Ayad, R.; Aziz, T.; Babu, V.; Badhrees, I.; Bahinipati, S.; Bakich, A. M.; Bansal, V.; Barberio, E.; Behera, P. K.; Bhuyan, B.; Biswal, Jyoti Prakash; Bobrov, A.; Bondar, A.; Bonvicini, G.; Bożek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, K.; Choi, Y.; Cinabro, D.; Dash, N.; Carlo, S. Di; Doležal, Z.; Drásal, Z.; Dutta, D.; Eidelman, S.; Farhat, H.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gelb, M.; Gillard, R.; Golob, B.; Grzymkowska, O.; Guido, E.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Hsu, C.-L.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jacobs, W. W.; Jaeglé, I.; Jeon, H. B.; Jin, Y.; Joffe, D.; Joo, K. K.; Julius, T.; Kahn, J.; Kaliyar, A. B.; Kang, K. H.; Karyan, G.; Katrenko, P.; Kawasaki, T.; Keck, Thomas M.; Kichimi, H.; Kiesling, C.; Kim, D. Y.; Kim, H. J.; Kim, J. B.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Krokovny, P.; Kuhr, T.; Kulasiri, R.; Kumita, T.; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Li, C. H.; Li, L.; Li, Y.; Gioi, L. Li; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; Masuda, M.; Matsuda, T.; Matvienko, D.; Metzner, F.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moon, H. K.; Mori, Takashi; Mussa, R.; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Natkaniec, Z.; Nayak, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Okuno, S.; Ono, H.; Onuki, Y.; Pakhlova, G.; Pal, B.; Park, C. S.; Park, C. W.; Park, H.; Paul, S.; Pedlar, T. K.; Pesántez, L.; Piilonen, L. E.; Prim, M. T.; Pulvermacher, C.; Ritter, M.; Rostomyan, A.; Sakai, Y.; Sandilya, S.; Šantelj, L.; Sanuki, T.; Sato, Y.; Savinov, V.; Schlüter, T.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Seong, I. S.; Sevior, M. E.; Shebalin, V.; Shen, C. P.; Shibata, T. A.; Shiu, J. G.; Shwartz, B.; Simon, F.; Solovieva, E.; Starič, M.; Strube, J.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tenchini, F.; Trabelsi, K.; Tsuboyama, T.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Hulse, C. Van; Varner, G.; Vorobyev, V.; Vossen, A.; Waheed, E.; Wang, B.; Wang, C. H.; Wang, M. Z.; Wang, P.; Watanabe, M.; Watanabe, Y.; Wehle, S.; Williams, K. M.; Won, E.; Yamamoto, H.; Yamashita, Y.; Ye, H.; Yook, Y.; Yuan, C. Z.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.; Ziegler, M.; Zupanc, A.

doi:10.1103/physrevd.96.091101

Cited by 155 publications

(93 citation statements)

References 24 publications

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“…The FCNC rates from such a coupling are UV dependent -the degree to which this can affect constraints is discussed in the text. We use the limits on B decays from [54][55][56], from [57,58] for K decays ( [59] for SM prediction for K → πνν decay), from [60] for the CHARM beam dump, from [45] for ν − e scattering, and finally from [48,49] for computing the constraints on atomic parity violation. The Higgs decay constraints arise from direct searches for h → XX and h → ZX with the solid color correspond to a vector coupled to H † DX H and the dotted to a coupling to H † DH [51].…”

Section: Hdm Examplementioning

confidence: 99%

Light vectors coupled to bosonic currents

2019

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New spin-1 particles with masses below the weak scale are present in many theories of beyond Standard Model (SM) physics. In this work, we extend previous analyses by systematically considering the couplings of such a vector to the bosonic sector of the SM, focusing on models that lead to mass-mixing with the Z boson. These couplings generically lead to enhanced emission of the vector's longitudinal mode, both in Higgs decays and in flavor changing meson decays. We present bounds in the SM+X effective theory and investigate their model-dependence. For the case of Higgs decays, we point out that tree-level vector emission is, depending on the model, not always enhanced, affecting the constraints. For meson decays, which are the dominant constraints at small vector masses, we find that while B decay constraints can be weakened by fine-tuning UV parameters, it is generically difficult to suppress the stringent constraints from kaon decays.

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Section: Hdm Examplementioning

confidence: 99%

Light vectors coupled to bosonic currents

2019

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“…We find that the most severe constraint to the model from low-energy observables comes from the sensitive decay B → K ( * ) νν [41,43] which was constrained to be [61]…”

Section: Discussionmentioning

confidence: 97%

Nonresonant leptoquark with multigeneration couplings for μμjj and μνjj at the LHC

Álvarez

Szewc

2019

Phys. Rev. D

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CMS has recently reported [1] a moderate excess in the µνjj final state in a second generation Leptoquark search, but they have disregarded it because the excess is not present in the µµjj final state and because they do not observe the expected resonant peak in the distributions. As a proof of concept we show that a simple Leptoquark model including second and third generation couplings with non-negligible single-and non-resonant production in addition to usual pair production could explain the data: excess (µνjj), lack of excess (µµjj) and missing peak in the distributions; while being in agreement with collider constraints. We take this result and analysis as a starting point of a reconsideration of the ATLAS and CMS second generation Leptoquark searches. We also discuss which would be the consequences and modifications that should be performed in the searches to test if this deviation would correspond to a New Physics signal. We observe that low-energy flavor constraints can be avoided by adding heavier particles to the model.

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“…The most important constraint on it arises from the combination with the invisible decay width, and comes from B → Kχχ. This process experimentally gives the same signature of the SM process B → Kνν, which has been looked for at both Belle and Babar [32][33][34][35], A combination of those measurements gives BR(B → Kinv.) < 1.5 × 10 −5 at 95%CL [1].…”

Section: Constraints and Phenomenological Implicationsmentioning

confidence: 94%

A light dimuon resonance in B decays?

Sala¹

2018

Nuclear and Particle Physics Proceedings

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The observed deviations from the Standard Model in several b → sµµ processes can be explained in terms of a new vector boson produced on-shell in B meson decays. A mass of 2.5 − 3 GeV and a total width of 10 − 20% allow to hide the associated dimuon bump in the poorly known charmonium region, and the large invisible decay width can be interpreted in terms of Dark Matter. This proposal predicts a contribution to the muon anomalous magnetic moment, that could explain the long-standing tension with the Standard Model. It also predicts sizeable invisible B decays and a peculiar q 2 -dependence of the lepton flavor universality ratios RK and RK * , that could be tested at the LHCb and Belle-II. This proceeding is based on [1], and slightly extends it with comments about Dark Matter.

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Search for B→hνν¯ decays with semileptonic tagging at Belle

Cited by 155 publications

References 24 publications

Light vectors coupled to bosonic currents

Light vectors coupled to bosonic currents

Nonresonant leptoquark with multigeneration couplings for μμjj and μνjj at the LHC

A light dimuon resonance in B decays?

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