skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement of the branching fraction and C P asymmetry in B 0 π 0 π 0 decays, and an improved constraint on Φ 2

Abstract

We measure the branching fraction and CP violation asymmetry in the decay B0 ! 00, using a data sample of 752 106 BB pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e collider. The obtained branching fraction and direct CP asymmetry are B(B !00) = [1:31 0:19 (stat.) 0:19 (syst.)] 106 and ACP = +0:14 0:36 (stat.) :10 (syst.); respectively. The signal signicance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle's earlier measurements of B0 ! + and B ! 0 to exclude the CP-violating parameter 2 from the range 15:5 < 2 < 75:0 at 95% condence level.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Belle Collaboration
OSTI Identifier:
1390427
Report Number(s):
PNNL-SA-128818
Journal ID: ISSN 2470-0010; PRVDAQ; KA2201020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 3; 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

Citation Formats

Julius, T., Sevior, M. E., Mohanty, G. B., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Barberio, E., Barrett, M., Berger, M., Bhardwaj, V., Bhuyan, B., Biswal, J., Bloomfield, T., Bobrov, A., Bondar, A., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Červenkov, D., Chang, M. -C., Chao, Y., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, Y., Cinabro, D., Dash, N., Di Carlo, S., Doležal, Z., Dossett, D., Drásal, Z., Dutta, D., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Gillard, R., Goldenzweig, P., Haba, J., Hara, T., Hayasaka, K., Hayashii, H., Hou, W. -S., Hsu, C. -L., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, Y., Jacobs, W. W., Jaegle, I., Jin, Y., Joffe, D., Joo, K. K., Kahn, J., Karyan, G., Katrenko, P., Kawasaki, T., Kiesling, C., Kim, D. Y., Kim, H. J., Kim, J. B., Kim, K. T., Kim, M. J., Kim, S. H., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Krokovny, P., Krohn, J. F., Kuhr, T., Kulasiri, R., Kuzmin, A., Kwon, Y. -J., Lange, J. S., Lee, I. S., Li, C. H., Li, L., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Luo, T., MacNaughton, J., Masuda, M., Matsuda, T., Merola, M., Miyabayashi, K., Miyata, H., Mizuk, R., Moon, H. K., Mori, T., Mussa, R., Nakano, E., Nakao, M., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, C. -S., Park, H., Pesántez, L., Pestotnik, R., Piilonen, L. E., Pulvermacher, C., Ritter, M., Sahoo, H., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Sato, Y., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Shebalin, V., Shibata, T. -A., Shiu, J. -G., Shwartz, B., Sokolov, A., Solovieva, E., Starič, M., Sumiyoshi, T., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Hulse, C., Varner, G., Varvell, K. E., Vossen, A., Waheed, E., Wang, C. H., Wang, M. -Z., Wang, P., Watanabe, M., Watanabe, Y., Widmann, E., Williams, K. M., Won, E., Yamashita, Y., Ye, H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhulanov, V., and Zupanc, A. Measurement of the branching fraction and CP asymmetry in B0→π0π0 decays, and an improved constraint on Φ2. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.032007.
Julius, T., Sevior, M. E., Mohanty, G. B., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Barberio, E., Barrett, M., Berger, M., Bhardwaj, V., Bhuyan, B., Biswal, J., Bloomfield, T., Bobrov, A., Bondar, A., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Červenkov, D., Chang, M. -C., Chao, Y., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, Y., Cinabro, D., Dash, N., Di Carlo, S., Doležal, Z., Dossett, D., Drásal, Z., Dutta, D., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Gillard, R., Goldenzweig, P., Haba, J., Hara, T., Hayasaka, K., Hayashii, H., Hou, W. -S., Hsu, C. -L., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, Y., Jacobs, W. W., Jaegle, I., Jin, Y., Joffe, D., Joo, K. K., Kahn, J., Karyan, G., Katrenko, P., Kawasaki, T., Kiesling, C., Kim, D. Y., Kim, H. J., Kim, J. B., Kim, K. T., Kim, M. J., Kim, S. H., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Krokovny, P., Krohn, J. F., Kuhr, T., Kulasiri, R., Kuzmin, A., Kwon, Y. -J., Lange, J. S., Lee, I. S., Li, C. H., Li, L., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Luo, T., MacNaughton, J., Masuda, M., Matsuda, T., Merola, M., Miyabayashi, K., Miyata, H., Mizuk, R., Moon, H. K., Mori, T., Mussa, R., Nakano, E., Nakao, M., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, C. -S., Park, H., Pesántez, L., Pestotnik, R., Piilonen, L. E., Pulvermacher, C., Ritter, M., Sahoo, H., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Sato, Y., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Shebalin, V., Shibata, T. -A., Shiu, J. -G., Shwartz, B., Sokolov, A., Solovieva, E., Starič, M., Sumiyoshi, T., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Hulse, C., Varner, G., Varvell, K. E., Vossen, A., Waheed, E., Wang, C. H., Wang, M. -Z., Wang, P., Watanabe, M., Watanabe, Y., Widmann, E., Williams, K. M., Won, E., Yamashita, Y., Ye, H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhulanov, V., & Zupanc, A. Measurement of the branching fraction and CP asymmetry in B0→π0π0 decays, and an improved constraint on Φ2. United States. https://doi.org/10.1103/PhysRevD.96.032007
Julius, T., Sevior, M. E., Mohanty, G. B., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Barberio, E., Barrett, M., Berger, M., Bhardwaj, V., Bhuyan, B., Biswal, J., Bloomfield, T., Bobrov, A., Bondar, A., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Červenkov, D., Chang, M. -C., Chao, Y., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, Y., Cinabro, D., Dash, N., Di Carlo, S., Doležal, Z., Dossett, D., Drásal, Z., Dutta, D., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Gillard, R., Goldenzweig, P., Haba, J., Hara, T., Hayasaka, K., Hayashii, H., Hou, W. -S., Hsu, C. -L., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, Y., Jacobs, W. W., Jaegle, I., Jin, Y., Joffe, D., Joo, K. K., Kahn, J., Karyan, G., Katrenko, P., Kawasaki, T., Kiesling, C., Kim, D. Y., Kim, H. J., Kim, J. B., Kim, K. T., Kim, M. J., Kim, S. H., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Krokovny, P., Krohn, J. F., Kuhr, T., Kulasiri, R., Kuzmin, A., Kwon, Y. -J., Lange, J. S., Lee, I. S., Li, C. H., Li, L., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Luo, T., MacNaughton, J., Masuda, M., Matsuda, T., Merola, M., Miyabayashi, K., Miyata, H., Mizuk, R., Moon, H. K., Mori, T., Mussa, R., Nakano, E., Nakao, M., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, C. -S., Park, H., Pesántez, L., Pestotnik, R., Piilonen, L. E., Pulvermacher, C., Ritter, M., Sahoo, H., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Sato, Y., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Shebalin, V., Shibata, T. -A., Shiu, J. -G., Shwartz, B., Sokolov, A., Solovieva, E., Starič, M., Sumiyoshi, T., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Van Hulse, C., Varner, G., Varvell, K. E., Vossen, A., Waheed, E., Wang, C. H., Wang, M. -Z., Wang, P., Watanabe, M., Watanabe, Y., Widmann, E., Williams, K. M., Won, E., Yamashita, Y., Ye, H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhulanov, V., and Zupanc, A. 2017. "Measurement of the branching fraction and CP asymmetry in B0→π0π0 decays, and an improved constraint on Φ2". United States. https://doi.org/10.1103/PhysRevD.96.032007.
@article{osti_1390427,
title = {Measurement of the branching fraction and CP asymmetry in B0→π0π0 decays, and an improved constraint on Φ2},
author = {Julius, T. and Sevior, M. E. and Mohanty, G. B. and Adachi, I. and Aihara, H. and Al Said, S. and Asner, D. M. and Aulchenko, V. and Aushev, T. and Ayad, R. and Babu, V. and Badhrees, I. and Bakich, A. M. and Bansal, V. and Barberio, E. and Barrett, M. and Berger, M. and Bhardwaj, V. and Bhuyan, B. and Biswal, J. and Bloomfield, T. and Bobrov, A. and Bondar, A. and Bonvicini, G. and Bozek, A. and Bračko, M. and Browder, T. E. and Červenkov, D. and Chang, M. -C. and Chao, Y. and Chekelian, V. and Chen, A. and Cheon, B. G. and Chilikin, K. and Cho, K. and Choi, Y. and Cinabro, D. and Dash, N. and Di Carlo, S. and Doležal, Z. and Dossett, D. and Drásal, Z. and Dutta, D. and Eidelman, S. and Farhat, H. and Fast, J. E. and Ferber, T. and Fulsom, B. G. and Gaur, V. and Gabyshev, N. and Garmash, A. and Gillard, R. and Goldenzweig, P. and Haba, J. and Hara, T. and Hayasaka, K. and Hayashii, H. and Hou, W. -S. and Hsu, C. -L. and Iijima, T. and Inami, K. and Ishikawa, A. and Itoh, R. and Iwasaki, Y. and Jacobs, W. W. and Jaegle, I. and Jin, Y. and Joffe, D. and Joo, K. K. and Kahn, J. and Karyan, G. and Katrenko, P. and Kawasaki, T. and Kiesling, C. and Kim, D. Y. and Kim, H. J. and Kim, J. B. and Kim, K. T. and Kim, M. J. and Kim, S. H. and Kim, Y. J. and Kinoshita, K. and Kodyš, P. and Korpar, S. and Kotchetkov, D. and Križan, P. and Krokovny, P. and Krohn, J. F. and Kuhr, T. and Kulasiri, R. and Kuzmin, A. and Kwon, Y. -J. and Lange, J. S. and Lee, I. S. and Li, C. H. and Li, L. and Li, Y. and Li Gioi, L. and Libby, J. and Liventsev, D. and Luo, T. and MacNaughton, J. and Masuda, M. and Matsuda, T. and Merola, M. and Miyabayashi, K. and Miyata, H. and Mizuk, R. and Moon, H. K. and Mori, T. and Mussa, R. and Nakano, E. and Nakao, M. and Nanut, T. and Nath, K. J. and Natkaniec, Z. and Nayak, M. and Nisar, N. K. and Nishida, S. and Ogawa, S. and Ono, H. and Pakhlov, P. and Pakhlova, G. and Pal, B. and Pardi, S. and Park, C. -S. and Park, H. and Pesántez, L. and Pestotnik, R. and Piilonen, L. E. and Pulvermacher, C. and Ritter, M. and Sahoo, H. and Sakai, Y. and Salehi, M. and Sandilya, S. and Santelj, L. and Sanuki, T. and Sato, Y. and Savinov, V. and Schneider, O. and Schnell, G. and Schwanda, C. and Schwartz, A. J. and Seino, Y. and Senyo, K. and Shebalin, V. and Shibata, T. -A. and Shiu, J. -G. and Shwartz, B. and Sokolov, A. and Solovieva, E. and Starič, M. and Sumiyoshi, T. and Tamponi, U. and Tanida, K. and Tenchini, F. and Trabelsi, K. and Uchida, M. and Uehara, S. and Uglov, T. and Unno, Y. and Uno, S. and Urquijo, P. and Usov, Y. and Van Hulse, C. and Varner, G. and Varvell, K. E. and Vossen, A. and Waheed, E. and Wang, C. H. and Wang, M. -Z. and Wang, P. and Watanabe, M. and Watanabe, Y. and Widmann, E. and Williams, K. M. and Won, E. and Yamashita, Y. and Ye, H. and Yuan, C. Z. and Yusa, Y. and Zhang, Z. P. and Zhilich, V. and Zhulanov, V. and Zupanc, A.},
abstractNote = {We measure the branching fraction and CP violation asymmetry in the decay B0 ! 00, using a data sample of 752 106 BB pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e collider. The obtained branching fraction and direct CP asymmetry are B(B !00) = [1:31 0:19 (stat.) 0:19 (syst.)] 106 and ACP = +0:14 0:36 (stat.) :10 (syst.); respectively. The signal signicance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle's earlier measurements of B0 ! + and B ! 0 to exclude the CP-violating parameter 2 from the range 15:5 < 2 < 75:0 at 95% condence level.},
doi = {10.1103/PhysRevD.96.032007},
url = {https://www.osti.gov/biblio/1390427}, journal = {Physical Review D},
issn = {2470-0010},
number = 3,
volume = 96,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}

Works referenced in this record:

Review of Particle Physics
journal, October 2016


The EvtGen particle decay simulation package
journal, April 2001


A possible solution to the B π π puzzle using the principle of maximum conformality
journal, September 2015


Observables for the Analysis of Event Shapes in e + e Annihilation and Other Processes
journal, December 1978


Status of the Belle silicon vertex detector
journal, May 2006

  • Natkaniec, Z.; Aihara, H.; Asano, Y.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 560, Issue 1
  • https://doi.org/10.1016/j.nima.2005.11.228

B π π decays and effects of the next-to-leading order contributions
journal, July 2014


Physics achievements from the Belle experiment
journal, January 2012


C P -Violation in the Renormalizable Theory of Weak Interaction
journal, February 1973


Revisiting the B 0 π 0 π 0 decays in the perturbative QCD approach
journal, February 2017


Neutral <mml:math altimg="si203.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>B</mml:mi></mml:math> flavor tagging for the measurement of mixing-induced <mml:math altimg="si204.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi mathvariant="italic">CP</mml:mi></mml:math> violation at Belle
journal, November 2004

  • Kakuno, H.; Hara, K.; Casey, B. C. K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 533, Issue 3
  • https://doi.org/10.1016/j.nima.2004.06.159

Possible resolution of the B π π , π K puzzles
journal, February 2011


The Physics of the B Factories
journal, November 2014


Evidence for B 0 π 0 π 0
journal, December 2003


Measurement of the C P violation parameters in B 0 π + π decays
journal, November 2013


Search for hadronic b→u decays
journal, May 1990


Measurements of branching fractions of τ lepton decays with one or more K S 0
journal, April 2014


Overview of the KEKB accelerators
journal, February 2003


Measurement of the CKM angle γ from a combination of LHCb results
journal, December 2016


Observation of B 0 π 0 π 0
journal, May 2005


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
  • https://doi.org/10.1016/S0168-9002(01)02013-7

Implication of the B ρ ρ data on the B π π puzzle
journal, June 2006


Review of Particle Physics
text, January 2008


The Physics of the B Factories
text, January 2014


The Physics of the B Factories
text, January 2014


Review of Particle Physics
text, January 2018


Status of the Belle Silicon Vertex Detector
journal, December 2006


Review of Particle Physics
text, January 2012


Measurement of the CKM angle $\gamma$ from a combination of LHCb results
text, January 2016


The Physics of the B Factories
text, January 2014


Physics Achievements from the Belle Experiment
preprint, January 2012