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Lees, J. P.; Poireau, V.; Tisserand, V.; Graugés, E.; Palano, A.; Eigen, G.; Kolomensky, Yu. G.; Fritsch, M.; Koch, H.; Schroeder, T. Vazquez; Cheaib, R.; Hearty, C.; Mattison, T. S.; McKenna, J. A.; So, R. Y.; Blinov, V.; Бузыкаев, А. Р.; Дружинин, В. П.; Golubev, V. B.; Kozyrev, E. A.; Kravchenko, E. A.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.; Lankford, A. J.; Dey, B.; Gary, J. W.; Long, O.; Eisner, A. M.; Lockman, W. S.; Vazquez, W. Panduro; Chao, D. S.; Cheng, C. H.; Echenard, B.; Flood, K. T.; Hitlin, D. G.; Kim, J.; Li, Y.; Miyashita, T. S.; Ongmongkolkul, P.; Porter, F. C.; Röhrken, M.; Huard, Z.; Meadows, B.; Pushpawela, B. G.; Sokoloff, M. D.; Sun, L.; Smith, J. G.; Wagner, S. R.; Bernard, D.; Verderi, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Santoro, V.; Calcaterra, A.; Sangro, R. de; Finocchiaro, G.; Martellotti, S.; Patterí, P.; Peruzzi, I. M.; Piccolo, M.; Rotondo, M.; Zallo, A.; Passaggio, S.; Patrignani, C.; Lacker, H.; Bhuyan, B.; Mallik, U.; Chen, C.; Cochran, J.; Prell, S.; Gritsan, A. V.; Arnaud, N.; Davier, M.; Diberder, F. Le; Lutz, A. M.; Wormser, G.; Lange, D. J.; Wright, D. M.; Coleman, J. P.; Gabathuler, E.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Lodovico, F. Di; Sacco, R.; Cowan, G.; Banerjee, S.; Brown, D. N.; Davis, C. L.; Denig, A.; Gradl, W.; Grießinger, K.; Hafner, A.; Schubert, K. R.; Barlow, R. J.; Lafferty, G.; Cenci, R.; Jawahery, A.; Roberts, D. A.; Cowan, R.; Robertson, S. H.; Seddon, R. M.; Neri, N.; Palombo, F.; Cremaldi, L.; Godang, R.; Summers, D. J.; Taras, P.; Nardo, G. De; Sciacca, C.; Raven, G.; Jessop, C.; LoSecco, J. M.; Honscheid, K.; Kass, R.; Gaz, A.; Margoni, M.; Posocco, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben-Haim, E.; Bomben, M.; Bonneaud, G. R.; Calderini, G.; Chauveau, J.; Marchiori, G.; Ocariz, J.; Biasini, M.; Manoni, E.; Rossi, A.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Chrząszcz, M.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Rama, M.; Rizzo, G.; Walsh, J.; Zani, L.; Smith, A. J. S.; Anulli, F.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Pilloni, A.; Piredda, G.; Bünger, C.; Dittrich, S.; Grünberg, O.; Heß, M.; Leddig, T.; Voß, C.; Waldi, R.; Adye, T.; Wilson, F. F.; Emery, S.; Vasseur, G.; Aston, D.; Cartaro, C.; Convery, M. R.; Dorfan, J.; Dunwoodie, W.; Ebert, M.; Field, R. C.; Fulsom, B. G.; Graham, M. T.; Hast, C.; Innes, W. R.; Kim, P.; Leith, D. W. G. S.; Luitz, S.; MacFarlane, D. B.; Muller, D. R.; Neal, H. A.; Ratcliff, B. N.; Roodman, A.; Sullivan, M. K.; Va’vra, J.; Wisniewski, W. J.; Purohit, M.; Wilson, J. R.; Randle-Conde, A.; Sekula, S. J.; Ahmed, H.; Bellis, M.; Burchat, P. R.; Puccio, E. M. T.; Alam, M. S.; Ernst, J.; Gorodeisky, R.; Guttman, N.; Peimer, D. R.; Soffer, A.; Spanier, S.; Ritchie, J. L.; Schwitters, R. F.; Izen, J. M.; Lou, X.; Bianchi, F.; Mori, F. De; Filippi, A.; Gamba, D.; Lanceri, L.; Vitale, L.; Martínez-Vidal, F.; Oyanguren, A.; Albert, J.; Beaulieu, A.; Bernlochner, F. U.; King, G. J.; Kowalewski, R.; Lueck, T.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.; Tasneem, N.; Gershon, T.; Harrison, P. F.; Latham, T.; Prepost, R.; Wu, S. L.

doi:10.1103/physrevd.100.111101

Cited by 93 publications

(169 citation statements)

References 19 publications

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Mentioning

160

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“…Only a left-handed NP term would not give rise to any T -odd effect. In this connection, we observe that, if the decay Λ b → Λ c τν τ confirms the anomaly found in the semi-leptonic decay of B [7,8,9], a zero value for any of the above-mentioned T -odd observables would be an indication in favor of a V − A NP contribution [66]. B) Such observables may imply also TRV; unlike other measurements which were suggested [32] few years ago, this implication is independent of the CP T theorem.…”

Section: Applicationssupporting

confidence: 77%

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Polarization in (quasi-)two-body decays and new physics

Ajaltouni

Salvo

2019

Eur. Phys. J. C

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We consider two-body and quasi-two-body decays of the type f 1 → f 2 B, where f 1 and f 2 are spin-1/2 fermions and B a spin-0 or spin-1 boson. After recalling the non-covariant formalism for decay amplitudes, we derive the expression of the differential decay width and of the polarizations of the final spinning particles, both onand off-shell. We find an intriguing geometrical interpretation of the results about the polarization. We also illustrate some methods for measuring the polarizations of the resonances and for optimizing data analysis. Then we propose applications to semi-leptonic weak decays, with a major attention to the T -odd component of the polarization; this may help to find, simultaneously, possible time-reversal violations and hints to physics beyond the standard model. We suggest also a CP T test. Last, we discuss some T -odd observables for the production process of f 1 and for the study of the strong final state interactions of non-leptonic decays.

show abstract

Section: Applicationssupporting

confidence: 77%

“…Therefore it is essential to realize experiments where, either a clear contradiction with the SM is found, or at least more stringent constraints on physics beyond it are established. Indeed, in the past few years, some data concerning semi-leptonic decays exhibited strong tensions with the SM predictions [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Polarization in (quasi-)two-body decays and new physics

Ajaltouni

Salvo

2019

Eur. Phys. J. C

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“…a Seen in all three charge states. b Seen in [41], not seen in [42] c The exotic 0 −− quantum numbers are favored over 1…”

Section: Reactionmentioning

confidence: 99%

“…Above this mass, two further 1 ++ states were reported, χ c1 (4140) and χ c1 (4274). Both are seen in B ± → J/ψφK ± decays, the former state by several collaborations [35][36][37][38][39] (only the latest reference of the collaborations are given here), the latter one by CDF [38] and LHCb [39].…”

Section: Reactionmentioning

confidence: 99%

Are the XYZ states unconventional states or conventional states with unconventional properties?

Hanhart

Klempt

2020

Int. J. Mod. Phys. A

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We discuss three possible scenarios for the interpretation of mesons containing a heavy quark and its antiquark near and above the first threshold for a decay into a pair of heavy mesons in a relative S-wave. View I assumes that these thresholds force the quark potential to flatten which implies that while in these energy ranges molecular states may be formed there should not be any quarkanti-quark states above these thresholds. View II assumes that the main part of the interaction between two mesons is due to the poles which originate from the QQ interaction. The properties of the QQ mesons are strongly influenced by opening thresholds but the number of states is given by the quark model. In View III, both types of mesons are admitted also near and above the open flavor thresholds: QQ mesons and dynamically generated mesons. Experimental consequences of these different views are discussed.

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“…Other nuclear processes proposed to search for include, for instance, the muon to positron or antimuon conversion µ − X → e + (µ + )X in the upcoming Mu2e experiment [7]. On the other hand, there is a plethora of flavor physics experiments in recent years that search for LNV decays in flavored and charged mesons such as K ± , D ± , D ± s , B ± and the τ lepton [8,9,10,11,12,13,14,15,16,17,18,19,20,21], and the bounds on some of the decays are expected to be considerably improved in future experiments [22,23].…”

Section: Introductionmentioning

confidence: 99%

Effective field theory approach to lepton number violating decays K±→ π∓l±l±: short-distance contribution

Liao

Wang

2020

J. High Energ. Phys.

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This is a sequel to our recent work [1] in which we calculated the lepton number violating (LNV) K ± decays due to contact dimension-9 (dim-9) quark-lepton effective interactions that are induced at a high energy scale. In this work we investigate the long-distance contribution to the decays arising from the exchange of a neutrino. These decays can probe LNV interactions involving the second generation of fermions that are not reachable in nuclear neutrinoless double-β decays. Our study is completely formulated in the framework of effective field theories (EFTs), from the standard model effective field theory (SMEFT) through the low energy effective field theory (LEFT) to chiral perturbation theory (χPT). We work to the first nontrivial orders in each effective field theory, collect along the way the matching conditions and renormalization group effects, and express the decay branching ratios in terms of the Wilson coefficients associated with the dim-5 and dim-7 operators in SMEFT. Our result is general in that it does not depend on dynamical details of physics at a high scale that induce the effective interactions in SMEFT and in that it does not appeal to any hadronic models. We find that the long-distance contribution overwhelmingly dominates over the contact or short-distance one. Assuming the new physics scale to be around a TeV, the branching ratios are predicted to be below the current experimental upper bounds by several orders of magnitude. 1

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Search for B−→Λp¯νν
J. P. Lees¹,
V. Poireau²,
V. Tisserand³
et al.

Cited by 93 publications

References 19 publications

Polarization in (quasi-)two-body decays and new physics

Polarization in (quasi-)two-body decays and new physics

Are the XYZ states unconventional states or conventional states with unconventional properties?

Effective field theory approach to lepton number violating decays K±→ π∓l±l±: short-distance contribution

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Resources

About

Search for B−→Λp¯ννJ. P. Lees1, V. Poireau2, V. Tisserand3 et al.

Cited by 93 publications

References 19 publications

Polarization in (quasi-)two-body decays and new physics

Polarization in (quasi-)two-body decays and new physics

Are the XYZ states unconventional states or conventional states with unconventional properties?

Effective field theory approach to lepton number violating decays K±→ π∓l±l±: short-distance contribution

Contact Info

Product

Resources

About

Search for B−→Λp¯νν
J. P. Lees¹,
V. Poireau²,
V. Tisserand³
et al.