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Title: Measurement of the τ lepton polarization and R ( D * ) in the decay B ¯ D * τ ν ¯ τ with one-prong hadronic τ decays at Belle

Abstract

With the full data sample of 772 × 10 6 B B ¯ pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay B ¯ D*τ- ν ¯ τ is studied with the hadronic τ decays τ-π- ν τ and τ-ρ- ν τ . The τ polarization P τ (D*) in two-body hadronic τ decays is measured, as well as the ratio of the branching fractions R ( D * ) = B ( B ¯ D * τ - ν ¯ τ ) / B ( B ¯ D * - ν ¯ ) , where - denotes an electron or a muon. Our results, P τ ( D * ) = - 0.38 ± 0.51 ( stat ) - 0.16 + 0.21 ( syst ) and R ( D * ) = 0.270 ± 0.035 ( stat ) - 0.025 + 0.028 ( syst ) , are consistent with the theoretical predictions of the standard model. The polarization values of P τ (D*)>+0.5 are excluded at the 90% confidence level.

Authors:
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Publication Date:
Research Org.:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
The Belle Collaboration
OSTI Identifier:
1416426
Alternate Identifier(s):
OSTI ID: 1578184; OSTI ID: 1594345
Report Number(s):
PNNL-SA-132801
Journal ID: ISSN 2470-0010; PRVDAQ; 012004
Grant/Contract Number:  
SC0009973; AC05-76RL01830
Resource Type:
Published Article
Journal Name:
Physical Review. D.
Additional Journal Information:
Journal Name: Physical Review. D. Journal Volume: 97 Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Mesons

Citation Formats

Hirose, S., Iijima, T., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Aziz, T., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Berger, M., Bhardwaj, V., Bhuyan, B., Biswal, J., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Červenkov, D., Chang, M. -C., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Czank, T., Dash, N., Di Carlo, S., Doležal, Z., Dutta, D., Eidelman, S., Fast, J. E., Ferber, T., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Golob, B., Guan, Y., Guido, E., Haba, J., Hara, K., Hayasaka, K., Hayashii, H., Hedges, M. T., Higuchi, T., Hou, W. -S., Hsu, C. -L., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Jaegle, I., Jeon, H. B., Jin, Y., Julius, T., Kang, K. H., Karyan, G., Kawasaki, T., Kim, D. Y., Kim, J. B., Kim, S. H., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Kuzmin, A., Kwon, Y. -J., Lange, J. S., Lee, I. S., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Lubej, M., Matsuda, T., Miyabayashi, K., Miyata, H., Mohanty, G. B., Mohanty, S., Moon, H. K., Mori, T., Mussa, R., Nakamura, K. R., Nakao, M., Nanut, T., Nath, K. J., Natkaniec, Z., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, S., Okuno, S., Ono, H., Pal, B., Pardi, S., Park, C. W., Park, H., Paul, S., Pestotnik, R., Piilonen, L. E., Popov, V., Ritter, M., Rostomyan, A., Rozanska, M., Sakai, Y., Salehi, M., Sandilya, S., Sato, Y., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shebalin, V., Shibata, T. -A., Shimizu, N., Shiu, J. -G., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Strube, J. F., Stypula, J., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Uno, S., Urquijo, P., Van Hulse, C., Varner, G., Varvell, K. E., Vorobyev, V., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Wehle, S., Widmann, E., Won, E., Yamamoto, H., Yamashita, Y., Ye, H., Yuan, C. Z., Yusa, Y., Zakharov, S., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., Zupanc, A., and The Belle Collaboration. Measurement of the τ lepton polarization and R ( D * ) in the decay B ¯ → D * τ − ν ¯ τ with one-prong hadronic τ decays at Belle. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.012004.
Hirose, S., Iijima, T., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Aziz, T., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Berger, M., Bhardwaj, V., Bhuyan, B., Biswal, J., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Červenkov, D., Chang, M. -C., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Czank, T., Dash, N., Di Carlo, S., Doležal, Z., Dutta, D., Eidelman, S., Fast, J. E., Ferber, T., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Golob, B., Guan, Y., Guido, E., Haba, J., Hara, K., Hayasaka, K., Hayashii, H., Hedges, M. T., Higuchi, T., Hou, W. -S., Hsu, C. -L., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Jaegle, I., Jeon, H. B., Jin, Y., Julius, T., Kang, K. H., Karyan, G., Kawasaki, T., Kim, D. Y., Kim, J. B., Kim, S. H., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Kuzmin, A., Kwon, Y. -J., Lange, J. S., Lee, I. S., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Lubej, M., Matsuda, T., Miyabayashi, K., Miyata, H., Mohanty, G. B., Mohanty, S., Moon, H. K., Mori, T., Mussa, R., Nakamura, K. R., Nakao, M., Nanut, T., Nath, K. J., Natkaniec, Z., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, S., Okuno, S., Ono, H., Pal, B., Pardi, S., Park, C. W., Park, H., Paul, S., Pestotnik, R., Piilonen, L. E., Popov, V., Ritter, M., Rostomyan, A., Rozanska, M., Sakai, Y., Salehi, M., Sandilya, S., Sato, Y., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shebalin, V., Shibata, T. -A., Shimizu, N., Shiu, J. -G., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Strube, J. F., Stypula, J., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Uno, S., Urquijo, P., Van Hulse, C., Varner, G., Varvell, K. E., Vorobyev, V., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Wehle, S., Widmann, E., Won, E., Yamamoto, H., Yamashita, Y., Ye, H., Yuan, C. Z., Yusa, Y., Zakharov, S., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., Zupanc, A., & The Belle Collaboration. Measurement of the τ lepton polarization and R ( D * ) in the decay B ¯ → D * τ − ν ¯ τ with one-prong hadronic τ decays at Belle. United States. https://doi.org/10.1103/PhysRevD.97.012004
Hirose, S., Iijima, T., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Aziz, T., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Berger, M., Bhardwaj, V., Bhuyan, B., Biswal, J., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Červenkov, D., Chang, M. -C., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Czank, T., Dash, N., Di Carlo, S., Doležal, Z., Dutta, D., Eidelman, S., Fast, J. E., Ferber, T., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Golob, B., Guan, Y., Guido, E., Haba, J., Hara, K., Hayasaka, K., Hayashii, H., Hedges, M. T., Higuchi, T., Hou, W. -S., Hsu, C. -L., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Jaegle, I., Jeon, H. B., Jin, Y., Julius, T., Kang, K. H., Karyan, G., Kawasaki, T., Kim, D. Y., Kim, J. B., Kim, S. H., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Kuzmin, A., Kwon, Y. -J., Lange, J. S., Lee, I. S., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Lubej, M., Matsuda, T., Miyabayashi, K., Miyata, H., Mohanty, G. B., Mohanty, S., Moon, H. K., Mori, T., Mussa, R., Nakamura, K. R., Nakao, M., Nanut, T., Nath, K. J., Natkaniec, Z., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, S., Okuno, S., Ono, H., Pal, B., Pardi, S., Park, C. W., Park, H., Paul, S., Pestotnik, R., Piilonen, L. E., Popov, V., Ritter, M., Rostomyan, A., Rozanska, M., Sakai, Y., Salehi, M., Sandilya, S., Sato, Y., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shebalin, V., Shibata, T. -A., Shimizu, N., Shiu, J. -G., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Strube, J. F., Stypula, J., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Uno, S., Urquijo, P., Van Hulse, C., Varner, G., Varvell, K. E., Vorobyev, V., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Wehle, S., Widmann, E., Won, E., Yamamoto, H., Yamashita, Y., Ye, H., Yuan, C. Z., Yusa, Y., Zakharov, S., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., Zupanc, A., and The Belle Collaboration. Wed . "Measurement of the τ lepton polarization and R ( D * ) in the decay B ¯ → D * τ − ν ¯ τ with one-prong hadronic τ decays at Belle". United States. https://doi.org/10.1103/PhysRevD.97.012004.
@article{osti_1416426,
title = {Measurement of the τ lepton polarization and R ( D * ) in the decay B ¯ → D * τ − ν ¯ τ with one-prong hadronic τ decays at Belle},
author = {Hirose, S. and Iijima, T. and Adachi, I. and Adamczyk, K. and Aihara, H. and Al Said, S. and Asner, D. M. and Atmacan, H. and Aushev, T. and Ayad, R. and Aziz, T. and Babu, V. and Badhrees, I. and Bakich, A. M. and Bansal, V. and Berger, M. and Bhardwaj, V. and Bhuyan, B. and Biswal, J. and Bondar, A. and Bozek, A. and Bračko, M. and Browder, T. E. and Červenkov, D. and Chang, M. -C. and Chang, P. and Chekelian, V. and Chen, A. and Cheon, B. G. and Chilikin, K. and Cho, K. and Choi, S. -K. and Choi, Y. and Choudhury, S. and Cinabro, D. and Czank, T. and Dash, N. and Di Carlo, S. and Doležal, Z. and Dutta, D. and Eidelman, S. and Fast, J. E. and Ferber, T. and Fulsom, B. G. and Garg, R. and Gaur, V. and Gabyshev, N. and Garmash, A. and Gelb, M. and Giri, A. and Goldenzweig, P. and Golob, B. and Guan, Y. and Guido, E. and Haba, J. and Hara, K. and Hayasaka, K. and Hayashii, H. and Hedges, M. T. and Higuchi, T. and Hou, W. -S. and Hsu, C. -L. and Inami, K. and Inguglia, G. and Ishikawa, A. and Itoh, R. and Iwasaki, M. and Jaegle, I. and Jeon, H. B. and Jin, Y. and Julius, T. and Kang, K. H. and Karyan, G. and Kawasaki, T. and Kim, D. Y. and Kim, J. B. and Kim, S. H. and Kim, Y. J. and Kinoshita, K. and Kodyš, P. and Korpar, S. and Kotchetkov, D. and Križan, P. and Kroeger, R. and Krokovny, P. and Kuhr, T. and Kulasiri, R. and Kumar, R. and Kuzmin, A. and Kwon, Y. -J. and Lange, J. S. and Lee, I. S. and Li, L. K. and Li, Y. and Li Gioi, L. and Libby, J. and Liventsev, D. and Lubej, M. and Matsuda, T. and Miyabayashi, K. and Miyata, H. and Mohanty, G. B. and Mohanty, S. and Moon, H. K. and Mori, T. and Mussa, R. and Nakamura, K. R. and Nakao, M. and Nanut, T. and Nath, K. J. and Natkaniec, Z. and Niiyama, M. and Nisar, N. K. and Nishida, S. and Ogawa, S. and Okuno, S. and Ono, H. and Pal, B. and Pardi, S. and Park, C. W. and Park, H. and Paul, S. and Pestotnik, R. and Piilonen, L. E. and Popov, V. and Ritter, M. and Rostomyan, A. and Rozanska, M. and Sakai, Y. and Salehi, M. and Sandilya, S. and Sato, Y. and Schneider, O. and Schnell, G. and Schwanda, C. and Schwartz, A. J. and Seino, Y. and Senyo, K. and Sevior, M. E. and Shebalin, V. and Shibata, T. -A. and Shimizu, N. and Shiu, J. -G. and Simon, F. and Sokolov, A. and Solovieva, E. and Starič, M. and Strube, J. F. and Stypula, J. and Sumihama, M. and Sumisawa, K. and Sumiyoshi, T. and Takizawa, M. and Tamponi, U. and Tanida, K. and Tenchini, F. and Trabelsi, K. and Uchida, M. and Uglov, T. and Uno, S. and Urquijo, P. and Van Hulse, C. and Varner, G. and Varvell, K. E. and Vorobyev, V. and Vossen, A. and Wang, C. H. and Wang, M. -Z. and Wang, P. and Wang, X. L. and Wehle, S. and Widmann, E. and Won, E. and Yamamoto, H. and Yamashita, Y. and Ye, H. and Yuan, C. Z. and Yusa, Y. and Zakharov, S. and Zhang, Z. P. and Zhilich, V. and Zhukova, V. and Zhulanov, V. and Zupanc, A. and The Belle Collaboration},
abstractNote = {With the full data sample of 772×106 BB¯ pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay B¯→D*τ-ν¯τ is studied with the hadronic τ decays τ-→π-ντ and τ-→ρ-ντ. The τ polarization Pτ(D*) in two-body hadronic τ decays is measured, as well as the ratio of the branching fractions R(D*)=B(B¯→D*τ-ν¯τ)/B(B¯→D*ℓ-ν¯ℓ), where ℓ- denotes an electron or a muon. Our results, Pτ(D*)=-0.38±0.51(stat)-0.16+0.21(syst) and R(D*)=0.270±0.035(stat)-0.025+0.028(syst), are consistent with the theoretical predictions of the standard model. The polarization values of Pτ(D*)>+0.5 are excluded at the 90% confidence level.},
doi = {10.1103/PhysRevD.97.012004},
journal = {Physical Review. D.},
number = 1,
volume = 97,
place = {United States},
year = {Wed Jan 10 00:00:00 EST 2018},
month = {Wed Jan 10 00:00:00 EST 2018}
}

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Flavor models for B ¯ D ( * ) τ ν ¯
journal, September 2015


The Belle detector
journal, February 2002

  • Abashian, A.; Gotow, K.; Morgan, N.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 1
  • DOI: 10.1016/S0168-9002(01)02013-7

Electron identification in Belle
journal, June 2002

  • Hanagaki, K.; Kakuno, H.; Ikeda, H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 485, Issue 3
  • DOI: 10.1016/S0168-9002(01)02113-1

B D ν form factors at nonzero recoil and | V c b | from 2 + 1 -flavor lattice QCD
journal, August 2015