Search for neutrinoless<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>τ</mml:mi></mml:math>decays involving the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>S</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup></mml:mrow></mml:math>meson

Chen, S.; Hinson, J. W.; Lee, J.; Miller, D. H.; Pavlunin, V.; Shibata, E. I.; Shipsey, I. P. J.; Cronin-Hennessy, D.; Lyon, A. L.; Park, C. S.; Park, W.; Thorndike, E. H.; Coan, T. E.; Gao, Y. S.; Liu, F.; Maravin, Y.; Stroynowski, R.; Artuso, M.; Boulahouache, C.; Bukin, K.; Dambasuren, E.; Khroustalev, K.; Mountain, R.; Nandakumar, R.; Skwarnicki, T.; Stone, S.; Wang, J. C.; Mahmood, A. H.; Csorna, S. E.; Danko, I.; Bonvicini, G.; Cinabro, D.; Dubrovin, M.; McGee, Steven; Bornheim, A.; Lipeles, E.; Pappas, S. P.; Shapiro, A.; Sun, W.; Weinstein, A. J.; Mahapatra, R.; Briere, R. A.; Chen, G. P.; Ferguson, T.; Tatishvili, G.; Vogel, H.; Adam, N.; Alexander, J.; Berkelman, K.; Boisvert, V.; Cassel, D. G.; Drell, P. S.; Duboscq, J. E.; Ecklund, K. M.; Ehrlich, R.; Galik, R. S.; Gibbons, L. K.; Gittelman, B.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hsu, L.; Jones, C. D.; Kandaswamy, J.; Kreinick, D. L.; Magerkurth, A.; Mahlke-Krüger, H.; Meyer, T. O.; Mistry, N. B.; Nordberg, E.; Patterson, J. R.; Peterson, D.; Pivarski, J.; Riley, D.; Sadoff, A. J.; Schwarthoff, H.; Shepherd, M. R.; Thayer, J. G.; Urner, D.; Viehhauser, G. H. A.; Warburton, A.; Weinberger, M.; Athar, S. B.; Avery, P.; Breva-Newell, L.; Potlia, V.; Stoeck, H.; Yelton, J.; Brandenburg, G.; Kim, D. Y.J.; Wilson, Richard; Benslama, K.; Eisenstein, B. I.; Ernst, J.; Gollin, G. D.; Hans, R. M.; Karliner, I.; Lowrey, N.; Plager, C.; Sedlack, C.; Selen, M.; Thaler, J. J.; Williams, James S.; Edwards, K. W.; Ammar, R.; Besson, D.; Zhao, Xinli; Anderson, S.; Frolov, V. V.; Kubota, Y.; Lee, S. J.; Li, S. Z.; Poling, R.; Smith, A.; Stepaniak, C. J.; Urheim, J.; Metreveli, Z.; Seth, K. K.; Tomaradze, A.; Zweber, P.; Ahmed, S.; Alam, M. S.; Jian, L.; Saleem, M.; Wappler, F. R.; Arms, K.; Eckhart, E.; Gan, K. K.; Gwon, C.; Hart, T.; Honscheid, K.; Hufnagel, D.; Kagan, H.; Kass, R.; Morris, C.; Pedlar, T. K.; Toerne, E. von; Wilksen, T.; Zoeller, M. M.; Muramatsu, H.; Richichi, S. J.; Severini, H.; Skubic, P.; Dytman, S.; Muêller, J.; Nam, S.; Savinov, V.

doi:10.1103/physrevd.66.071101

Cited by 12 publications

(5 citation statements)

References 15 publications

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“…Hence, the decay amplitudes for the nonfactorizable topologies have quite complicated structures, and the amplitude convolution integral involve the wave Among the three possible types of Feynman diagrams ( Fig.1, Fig.2, and Fig.3), only one or two of them will contribute to the specific B * q → DM decays. The explicit amplitudes for the concrete B * q → DP , DV decays have been collected in the Appendixes A and B, and the building blocks in the Appendixes C, D and E. According to the polarization relations between the initial and final vector mesons, the amplitudes for the B * q → DV decays can generally be decomposed into the following structures [44][45][46][47],…”

Section: E Decay Amplitudesmentioning

confidence: 99%

Study of the B¯q*→DM decays with perturbative QCD approach

et al. 2017

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The B * q → DP , DV weak decays are studied with the perturbative QCD approach, where q = u, d and s; P and V denote the ground SU (3) pseudoscalar and vector meson nonet. It is found that the branching ratios for the color-allowed B * q → D q ρ − decays can reach up to 10 −9 or more, and should be promisingly measurable at the running LHC and forthcoming SuperKEKB experiments in the near future.→ DM weak decays offer the unique opportunity of observing the weak decay of a vector meson, where polarization effects could be explored. This paper is organized as follows. In section II, we present the theoretical framework, the conventions and notations, together with amplitudes for the B * q → DM decays. Section III is devoted to the numerical results and discussion. The final section is a summary.

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Section: E Decay Amplitudesmentioning

confidence: 99%

Study of the B¯q*→DM decays with perturbative QCD approach

et al. 2017

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“…(28)-(31) reflect generally the feature that valence quarks of hadrons share momentum fractions according to their masses. The amplitude for the Υ(1S) → B c ρ decay is defined as below [29],…”

Section: Wave Functionsmentioning

confidence: 99%

The ϒ(1 S )→ B c ρ decay with perturbative QCD approach

Sun

Yang

et al. 2016

Nuclear Physics B

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With the potential prospects of the Υ(1S) data samples at the running LHC and upcoming SuperKEKB, the Υ(1S) → B c ρ weak decay is studied with the pQCD approach. It is found that (1) the lion's share of branching ratio comes from the longitudinal polarization helicity amplitudes;(2) branching ratio for the Υ(1S) → B c ρ decay can reach up to O(10 −9 ), which might be hopefully measurable.The Υ(1S) meson consists of the bottom quark and antiquark pair bb, carries the definitely established quantum numbers of I G J P C = 0 − 1 −− [1], and lies below the kinematic BB threshold. The Υ(1S) meson decay mainly through the strong interaction, the electromagnetic interaction and radiative transition. Besides, the Υ(1S) meson can also decay via the weak interactions within the standard model. More than 10 8 Υ(1S) data samples have been accumulated at Belle [2]. More and more upsilon data samples with high precision are promisingly expected at the running LHC and the forthcoming SuperKEKB. Although the branching ratio for the Υ(1S) weak decay is tiny, it seems to exist a realistic possibility to search for the signals of the Υ(1S) weak decay at future experiments. In this paper, we will study the Υ(1S) → B c ρ weak decay with the perturbative QCD (pQCD) approach [3][4][5]. Experimentally, there is no report on the Υ(1S) → B c ρ weak decay so far. The signals for the Υ(1S) → B c ρ weak decay should, in principle, be easily identified, due to the facts that the final states have different electric charges, have definite momentum and energy, and are back-to-back in the rest frame of the Υ(1S) meson. In addition, the identification of a single flavored B c meson could be used to effectively enhance signal-to-background ratio. Another important and fashionable motivation is that evidences of an abnormally large branching ratio for the Υ(1S) weak decay might be a hint of new physics.Theoretically, the Υ(1S) → B c ρ weak decay belongs to the external W emission topography, and is favored by the Cabibbo-Kabayashi-Maskawa (CKM) matrix elements |V cb V * ud |. So it should have relatively large branching ratio among the Υ(1S) weak decays, which has been studied with the naive factorization (NF) approximation [6,7]. Recently, some attractive methods have been developed, such as the pQCD approach [3][4][5], the QCD factorization approach [8-10], soft and collinear effective theory [11][12][13][14], and applied widely to accommodate measurements on the B meson weak decays. The Υ(1S) → B c ρ decay permit one to cross check parameters obtained from the B meson decay, to test the practical applicability of various phenomenological models in the vector meson weak decays, and to further explore the underlying dynamical mechanism of the heavy quark weak decay. In addition, as it is well known, the B c meson carries two explicit heavy flavors and has extremely abundant decay modes, but its hadronic production is suppressed compared with that for hidden-flavor quarkonia and heavy-light mesons, due to higher order in QCD coupling constants α s and

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“…One can also study strangeness in the nucleon using two-flavour χPT[75] thereby sidestepping issues of the slow(er) convergence of the chiral expansion around the physical strange-quark mass.…”

mentioning

confidence: 99%

Twist-two matrix elements at finite and infinite volume

Detmold

Lin

2005

Phys. Rev. D

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We present one-loop results for the forward twist-two matrix elements relevant to the unpolarised, helicity and transversity baryon structure functions, in partially-quenched (N_f=2 and N_f=2+1) heavy baryon chiral perturbation theory. The full-QCD limit can be straightforwardly obtained from these results and we also consider SU(2|2) quenched QCD. Our calculations are performed in finite volume as well as in infinite volume. We discuss features of lattice simulations and investigate finite volume effects in detail. We find that volume effects are not negligible, typically around 5--10% in current partially-quenched and full QCD calculations, and are possibly larger in quenched QCD. Extensions to the off-forward matrix elements and potential difficulties that occur there are also discussed.Comment: 35 pages, 7 figures, typos correcte

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Search for neutrinolessτdecays involving theKS0meson

Cited by 12 publications

References 15 publications

Study of the B¯q*→DM decays with perturbative QCD approach

Study of the B¯q*→DM decays with perturbative QCD approach

The ϒ(1 S )→ B c ρ decay with perturbative QCD approach

Twist-two matrix elements at finite and infinite volume

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