أعرض في EDS

Measurement of $R ( D )$ and $R ( D^ * )$ with a Semileptonic Tagging Method

التفاصيل البيبلوغرافية
العنوان: Measurement of $R ( D )$ and $R ( D^ * )$ with a Semileptonic Tagging Method
المؤلفون: Caria, G., Urquijo, P., Bahinipati, S., Li, L. K., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Luo, T., MacQueen, C., Masuda, M., Matsuda, T., Bakich, A. M., Matvienko, D., Merola, M., Metzner, F., Miyabayashi, K., Mohanty, G. B., Moon, T. J., Mori, T., Mussa, R., Nakamura, K. R., Nakao, M., Behera, P., Nath, K. J., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, K., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Beleño, C., Pakhlova, G., Pal, B., Pang, T., Park, H., Park, S.-H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Bennett, J., Popov, V., Prencipe, E., Prim, M. T., Rabusov, A., Resmi, P. K., Ritter, M., Rozanska, M., Russo, G., Sahoo, D., Sakai, Y., Bhuyan, B., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schueler, J., Schwanda, C., Schwartz, A. J., Seino, Y., Bilka, T., Senyo, K., Sevior, M. E., Shebalin, V., Shiu, J.-G., Shwartz, B., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Biswal, J., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Uno, S., Bozek, A., Usov, Y., Vahsen, S. E., Van Tonder, R., Varner, G., Varvell, K. E., Vossen, A., Waheed, E., Wang, B., Wang, C. H., Wang, M.-Z., Bračko, M., Wang, P., Wang, X. L., Watanuki, S., Wiechczynski, J., Won, E., Yamamoto, H., Yang, S. B., Ye, H., Yin, J. H., Yuan, C. Z., Adachi, I., Browder, T. E., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., Belle Collaboration, Campajola, M., Červenkov, D., Chang, P., Cheaib, R., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Aihara, H., Cho, K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Dash, N., De Nardo, G., Di Capua, F., Di Carlo, S., Doležal, Z., Al Said, S., Dong, T. V., Eidelman, S., Epifanov, D., Fast, J. E., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Asner, D. M., Garmash, A., Giri, A., Goldenzweig, P., Greenwald, D., Grzymkowska, O., Guan, Y., Hartbrich, O., Hayasaka, K., Hayashii, H., Higuchi, T., Atmacan, H., Hou, W.-S., Hsu, C.-L., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Aushev, T., Jeon, H. B., Jia, S., Jin, Y., Joffe, D., Joo, K. K., Kaliyar, A. B., Kang, K. H., Karyan, G., Kawasaki, T., Kichimi, H., Babu, V., Kim, C. H., Kim, D. Y., Kim, H. J., Kim, K. T., Kim, S. H., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Badhrees, I., Kroeger, R., Krohn, J.-F., Krokovny, P., Kuhr, T., Kumar, R., Kwon, Y.-J., Lange, J. S., Lee, I. S., Lee, J. K., Lee, S. C.
المصدر: Physical review letters 124(16), 161803 (2020). doi:10.1103/PhysRevLett.124.161803
بيانات النشر: Deutsches Elektronen-Synchrotron, DESY, Hamburg, 2020.
سنة النشر: 2020
مصطلحات موضوعية: B: semileptonic decay, D0 --> K+ K, annihilation [electron positron], D*(2010): hadronic decay, D+ --> K0(S) pi+ pi0, D+ --> K0(S) K+, D*(2010)+ --> D0 pi+, D+ --> K- 2pi+, D+ --> K0(S) pi+, D0 --> pi+ pi, B: branching ratio, D0 --> K0(S) pi+ pi, B: pair production, D+ --> K- K+ pi+, D0 --> K0(S) pi0, D: hadronic decay, electron positron: colliding beams, hadronic decay [D], mass difference: (D*(2010) D), pair production [B], electroproduction [Upsilon(10570)], colliding beams [electron positron], D0 --> K- pi+ pi0, Upsilon(10570): electroproduction, D+ --> K0(S) 2pi+ pi, BELLE, electron positron: annihilation, D0 --> K- 2pi+ pi, branching ratio [B], KEK-B, ddc:530, hadronic decay [D*(2010)], D*(2010)+ --> D+ pi0, B --> D tau- antineutrino/tau, D*(2010)0 --> D0 pi0, (D*(2010) D) [mass difference], branching ratio: ratio: measured, D0 --> K0(S) K+ K, D0 --> K- pi+, B --> D*(2010) tau- antineutrino/tau, semileptonic decay [B], ratio: measured [branching ratio], experimental results
الوصف: Physical review letters 124(16), 161803 (2020). doi:10.1103/PhysRevLett.124.161803
The experimental results on the ratios of branching fractions R(D)=B(¯B→Dτ−¯ντ)/B(¯B→Dℓ−¯νℓ) and R(D∗)=B(¯B→D∗τ−¯ντ)/B(¯B→D∗ℓ−¯νℓ), where ℓ denotes an electron or a muon, show a long-standing discrepancy with the standard model predictions, and might hint at a violation of lepton flavor universality. We report a new simultaneous measurement of R(D) and R(D∗), based on a data sample containing 772×106 B¯B events recorded at the Υ(4S) resonance with the Belle detector at the KEKB e+e− collider. In this analysis the tag-side B meson is reconstructed in a semileptonic decay mode and the signal-side τ is reconstructed in a purely leptonic decay. The measured values are R(D)=0.307±0.037±0.016 and R(D∗)=0.283±0.018±0.014, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the standard model predictions within 0.2, 1.1, and 0.8 standard deviations for R(D), R(D∗), and their combination, respectively. This work constitutes the most precise measurements of R(D) and R(D∗) performed to date as well as the first result for R(D) based on a semileptonic tagging method
Published by APS, College Park, Md.
اللغة: English
DOI: 10.3204/pubdb-2020-02372
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abad747e383d368dcee0357c986cd0a0Test
حقوق: OPEN
رقم الانضمام: edsair.doi.dedup.....abad747e383d368dcee0357c986cd0a0
قاعدة البيانات: OpenAIRE
الوصف
DOI:10.3204/pubdb-2020-02372