Study of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mi>τ</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msub><mml:mi>K</mml:mi><mml:mi>S</mml:mi></mml:msub><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mi>τ</mml:mi></mml:msub></mml:math> decay at Belle

Epifanov, D.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Balagura, V.; Barberio, E. L.; Bedny, I.; Belous, K.; Bitenc, U.; Bizjak, I.; Bondar, A.; Bożek, A.; Bračko, M.; Browder, T. E.; Chào, Y.; Chen, A.; Chen, K. F.; Chen, W. T.; Cheon, B. G.; Chiang, C. C.; Chistov, R.; Cho, I. S.; Choi, Y.; Dalseno, J.; Dash, M.; Drutskoy, A.; Eidelman, S.; Gokhroo, G.; Golob, B.; Ha, H.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hokuue, T.; Hoshi, Y.; Hou, W.-S.; Hsiung, Y.; Hyun, H. J.; Iijima, T.; Ikado, K.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kah, D. H.; Kaji, Hiroshi; Kang, J. H.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kim, H. O.; Kim, S. K.; Kim, Y. J.; Križan, P.; Krokovny, P.; Kumar, R.; Kuo, C. C.; Kuzmin, A.; Kwon, Y.-J.; Lee, J. S.; Lee, M. J.; Lee, S. E.; Lesiak, T.; Li, J.; Limosani, A.; Lin, S. W.; Liu, Y.; Liventsev, D.; Mandl, F.; Marlow, D.; Matsumoto, T.; Matyja, A.; McOnie, S.; Medvedeva, T.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Moloney, G. R.; Mori, Takashi; Nakano, E.; Nakao, M.; Nakazawa, H.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Onuki, Y.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Pałka, H.; Park, C. W.; Park, H.; Park, K. S.; Peak, L. S.; Pestotnik, R.; Piilonen, L. E.; Poluektov, A.; Sahoo, H.; Sakai, Y.; Schneider, O.; Seidl, R.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shibuya, H.; Shwartz, B.; Sokolov, A.; Somov, A.; Soni, N.; Stanič, S.; Starič, M.; Stoeck, H.; Sumiyoshi, T.; Takasaki, F.; Tamai, K.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tian, X. C.; Tikhomirov, I.; Tsuboyama, T.; Uehara, S.; Ueno, K.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Varner, G.; Vervink, K.; Villa, S.; Vinokurova, A.; Wang, C. H.; Wang, P.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Yuan, C. Z.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.

doi:10.1016/j.physletb.2007.08.045

Cited by 123 publications

(90 citation statements)

References 36 publications

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“…We have determined the parameters of the K * (892) 0 meson and found, in particular, a width smaller than the value quoted in [16]. Our result agrees with recent measurements from FOCUS [14], CLEO [9] and, τ decays (for the charged mode) [12]. Comparison between these measurements and present world average values is illustrated in Tab.…”

Section: Discussionsupporting

confidence: 88%

“…14. The measured fraction of the K * (1410) 0 is compatible with the value obtained in τ decays [12]. The relative phase between the K * (892) 0 and K * (1410) 0 is compatible with zero, as expected.…”

Section: Asupporting

confidence: 88%

“…A contribution to the P -wave from the K * (1410) 0 radial excitation was measured by LASS [5] in Kp interactions at small transfer and in τ decays [12]. As is discussed in the following, even if the statistical significance of a signal at high mass does not reach the level to claim an observation, data favor such a contribution and a signal containing the K * (892) 0 , the K * (1410) 0 and an S-wave components is considered as our nominal fit to data.…”

Section: Including Other Componentsmentioning

confidence: 99%

“…A study of the different partial waves requires separation of the τ polarization components using, for instance, information from the decay of the other τ lepton. No result is available yet on the phase of the Kπ S-wave [12] from these analyses. In D + → K − π + e + ν e there is also no additional hadron in the final state.…”

mentioning

confidence: 99%

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Analysis of theD+→K−π+e+νedecay channel

Sanchez¹,

Lees²,

Poireau³

et al. 2011

Phys. Rev. D

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Using 347.5 fb −1 of data recorded by the BABAR detector at the PEP-II electron-positron collider, 244 × 10 3 signal events for the D + → K − π + e + νe decay channel are analyzed. This decay mode is dominated by the K * (892) 0 contribution. We determine the K * (892) 0 parameters:2) MeV/c 2 and the Blatt-Weisskopf parameter rBW = 2.1±0.5±0.5 ( GeV/c) −1 where the first uncertainty comes from statistics and the second from systematic uncertainties. We also measure the parameters defining the corresponding hadronic form factors at q 2 = 0 (rV = V (0)A 1 (0) = 1.463±0.017±0.031, r2 = A 2 (0) A 1 (0) = 0.801±0.020±0.020) and the value of the axial-vector pole mass parameterizing the q 2 variation of A1 and A2: mA = (2.63±0.10±0.13) GeV/c 2 . The S-wave fraction is equal to (5.79 ± 0.16 ± 0.15)%. Other signal components correspond to fractions below 1%. Using the D + → K − π + π + channel as a normalization, we measure the D + semileptonic branching fraction: B(D + → K − π + e + νe) = (4.00 ± 0.03 ± 0.04 ± 0.09) × 10 −2 where the third uncertainty comes from external inputs. We then obtain the value of the hadronic form factor A1 at q 2 = 0: A1(0) = 0.6200 ± 0.0056 ± 0.0065 ± 0.0071. Fixing the P -wave parameters we measure the phase of the S-wave for several values of the Kπ mass. These results confirm those obtained with Kπ production at small momentum transfer in fixed target experiments.

show abstract

Section: Discussionsupporting

confidence: 88%

Section: Asupporting

confidence: 88%

Section: Including Other Componentsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Analysis of theD+→K−π+e+νedecay channel

Sanchez¹,

Lees²,

Poireau³

et al. 2011

Phys. Rev. D

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show abstract

“…The corresponding differential decay width was measured by the ALEPH [13] and OPAL [14] collaborations, and recently the B-factories BaBar [26] and Belle [27] have published increased accuracy measurements. These highquality data have motivated several refined studies of the related observables [28][29][30][31][32] allowing for precise determinations of the K (892) pole parameters because this resonance gives the most of the contribution to the dominating vector form factor.…”

Section: Introductionmentioning

confidence: 99%

τ − →K − η (′) ν τ decays in Chiral Perturbation Theory with resonances

Escribano

Gonzàlez-Solís

Roig

2013

J. High Energ. Phys.

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Abstract:We have studied the τ − → K − η ( ) ν τ decays within Chiral Perturbation Theory including resonances as explicit degrees of freedom. We have considered three different form factors according to treatment of final-state interactions. In increasing degree of soundness: Breit-Wigner, exponential resummation and dispersive representation. We find that although the first one fails in accounting for the data on the Kη mode, the other two approaches provide good fits to them which are sensitive to the K (1410) pole parameters, that are determined to be M K = 1330 +27 −41 MeV and Γ K = 217 +68 −122 MeV. These values are competitive with the standard determination from τ − → (Kπ) − ν τ decays. The corresponding predictions for the τ − → K − η ν τ channel respect the current upper bound and hint to the discovery of this decay mode in the near future.

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Contributions of $$ {K}_0^{\ast } $$(1430) and $$ {K}_0^{\ast } $$(1950) in the three-body decays B → Kπh

Wang

Chai

2020

J. High Energ. Phys.

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We study the contributions of the resonant states K * 0 (1430) and K * 0 (1950) in the three-body decays B → Kπh (with h = π, K) in the perturbative QCD approach. The crucial nonperturbative input F Kπ (s) in the distribution amplitudes of the S-wave Kπ system is derived from the matrix element of vacuum to Kπ pair. The CP averaged branching fraction of the quasi-two-body decay process B → K * 0 (1950)h → Kπh is about one order smaller than that of the corresponding decay B → K * 0 (1430)h → Kπh. In view of the important contribution from the S-wave Kπ system for the B → Kπh decays, it is not appropriate to neglect the K * 0 (1950) in the theoretical or experimental studies for the relevant three-body B meson decays. The predictions in this work for the relevant decays are consistent with the existing experimental data.

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Study of τ−→KSπ−ντ decay at Belle

Cited by 123 publications

References 36 publications

Analysis of theD+→K−π+e+νedecay channel

Analysis of theD+→K−π+e+νedecay channel

τ − →K − η (′) ν τ decays in Chiral Perturbation Theory with resonances

Contributions of $$ {K}_0^{\ast } $$(1430) and $$ {K}_0^{\ast } $$(1950) in the three-body decays B → Kπh

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