Search for CP Violation and Measurement of the Branching Fraction in the Decay D0 → KS0 KS0

Belle Collaboration

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18 Citations (Scopus)

Abstract

We report a study of the decay D0→KS0KS0 using 921 fb-1 of data collected at or near the (4S) and (5S) resonances with the Belle detector at the KEKB asymmetric energy e+e- collider. The measured time-integrated CP asymmetry is ACP(D0→KS0KS0)=(-0.02±1.53±0.02±0.17)%, and the branching fraction is B(D0→KS0KS0)=(1.321±0.023±0.036±0.044)×10-4, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D0→KS0π0). These results are significantly more precise than previous measurements available for this mode. The ACP measurement is consistent with the standard model expectation.

Original languageEnglish
Article number171801
JournalPhysical review letters
Volume119
Issue number17
DOIs
Publication statusPublished - 2017 Oct 23

Bibliographical note

Funding Information:
We report a study of the decay D 0 → K S 0 K S 0 using 921     fb - 1 of data collected at or near the ϒ ( 4 S ) and ϒ ( 5 S ) resonances with the Belle detector at the KEKB asymmetric energy e + e - collider. The measured time-integrated C P asymmetry is A C P ( D 0 → K S 0 K S 0 ) = ( - 0.02 ± 1.53 ± 0.02 ± 0.17 ) % , and the branching fraction is B ( D 0 → K S 0 K S 0 ) = ( 1.321 ± 0.023 ± 0.036 ± 0.044 ) × 10 - 4 , where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode ( D 0 → K S 0 π 0 ). These results are significantly more precise than previous measurements available for this mode. The A C P measurement is consistent with the standard model expectation. Pacific Northwest National Laboratory http://dx.doi.org/10.13039/100011661 Pacific Northwest National Lab PNNL http://sws.geonames.org/6252001/ Ministry of Education, Culture, Sports, Science and Technology http://dx.doi.org/10.13039/501100001700 MEXT Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691 JSPS http://sws.geonames.org/1861060/ Nagoya University http://dx.doi.org/10.13039/501100004823 http://sws.geonames.org/1861060/ Australian Research Council http://dx.doi.org/10.13039/501100000923 ARC http://sws.geonames.org/2077456/ Austrian Science Fund http://dx.doi.org/10.13039/501100002428 FWF Der Wissenschaftsfonds Fonds zur Förderung der Wissenschaftlichen Forschung FWF http://sws.geonames.org/2782113/ P 26794-N20 National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809 National Science Foundation of China Natural Science Foundation of China NSFC http://sws.geonames.org/1814991/ NNSFC 10575109 10775142 10875115 11175187 11475187 11521505 11575017 Chinese Academy of Sciences http://dx.doi.org/10.13039/501100002367 CAS http://sws.geonames.org/1814991/ Ministerstvo Školství, Mládeže a T?lovýchovy http://dx.doi.org/10.13039/501100001823 Ministry of Education, Youth and Sports MŠMT http://sws.geonames.org/3077311/ LTT17020 Carl-Zeiss-Stiftung http://dx.doi.org/10.13039/100007569 Carl Zeiss Foundation Carl Zeiss Stiftung http://sws.geonames.org/2921044/ Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659 German Research Foundation DFG Department of Science and Technology, Ministry of Science and Technology http://dx.doi.org/10.13039/501100001409 DST http://sws.geonames.org/1269750/ Istituto Nazionale di Fisica Nucleare of Italy Western Carolina University http://dx.doi.org/10.13039/100007176 WCU http://sws.geonames.org/6252001/ National Research Foundation of Korea http://dx.doi.org/10.13039/501100003725 NRF http://sws.geonames.org/1835841/ 2011-0029457 2012-0008143 2014-R1A2A2A01005286 2014-R1A2A2A01002734 2015-R1A2A2A01003280 2015-H1A2A1033649 2016-R1D1A1B01010135 2016K1A3A7A09005603 2016K1A3A7A09005604 2016R1D1A1B02012900 2016-K1A3A7A09005606 NRF-2013-K1A3A7A06056592 Korea Institute of Science and Technology Information http://dx.doi.org/10.13039/501100003708 KISTI http://sws.geonames.org/1835841/ Ministerstwo Nauki i Szkolnictwa Wy?szego http://dx.doi.org/10.13039/501100004569 Ministry of Science and Higher Education Ministry of Science and Higher Education, Republic of Poland MNiSW http://sws.geonames.org/798544/ Ministry of Education and Science of the Russian Federation http://dx.doi.org/10.13039/501100003443 Minobrnauka http://sws.geonames.org/2017370/ Russian Foundation for Basic Research http://dx.doi.org/10.13039/501100002261 RFBR http://sws.geonames.org/2017370/ Javna Agencija za Raziskovalno Dejavnost RS http://dx.doi.org/10.13039/501100004329 Slovenian Research Agency ARRS http://sws.geonames.org/3190538/ Ikerbasque, Basque Foundation for Science http://dx.doi.org/10.13039/501100003989 http://sws.geonames.org/2510769/ Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 Ministry of Economy and Competitiveness MINECO http://sws.geonames.org/2510769/ Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung http://dx.doi.org/10.13039/501100001711 Swiss National Science Foundation Fonds National Suisse de la Recherche Scientifique Fondo Nazionale Svizzero per la Ricerca Scientifica Fonds National Suisse Fondo Nazionale Svizzero Schweizerischer Nationalfonds SNF http://sws.geonames.org/2658434/ NSF-CH Ministry of Science and Technology, Taiwan http://dx.doi.org/10.13039/501100004663 Ministry of Science and Technology of Taiwan MOST http://sws.geonames.org/1668284/ U.S. Department of Energy http://dx.doi.org/10.13039/100000015 DOE http://sws.geonames.org/6252001/ DOE National Science Foundation http://dx.doi.org/10.13039/100000001 NSF

Funding Information:
We thank the KEKB group for the excellent operation of the accelerator; the KEK cryogenics group for the efficient operation of the solenoid; and the KEK computer group, the National Institute of Informatics, and the PNNL/EMSL computing group for valuable computing and SINET5 network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science (JSPS), and the Tau-Lepton Physics Research Center of Nagoya University; the Australian Research Council; Austrian Science Fund under Grant No. P 26794-N20; the National Natural Science Foundation of China under Contracts No. 10575109, No. 10775142, No. 10875115, No. 11175187, No. 11475187, No. 11521505, and No. 11575017; the Chinese Academy of Science Center for Excellence in Particle Physics; the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. LTT17020; the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe, and the VolkswagenStiftung; the Department of Science and Technology of India; the Istituto Nazionale di Fisica Nucleare of Italy; the WCU program of the Ministry of Education, National Research Foundation (NRF) of Korea Grants No. 2011-0029457, No. 2012-0008143, No. 2014-R1A2A2A01005286, No. 2014-R1A2A2A01002734, No. 2015-R1A2A2A01003280, No. 2015-H1A2A1033649, No. 2016-R1D1A1B01010135, No. 2016-K1A3A7A09005603, No. 2016-K1A3A7A09005604, No. 2016-R1D1A1B02012900, No. 2016-K1A3A7A09005606, and No. NRF-2013-K1A3A7A06056592; the Brain Korea 21-Plus program, Radiation Science Research Institute, Foreign Large-size Research Facility Application Supporting project and the Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information; the Polish Ministry of Science and Higher Education and the National Science Center; the Ministry of Education and Science of the Russian Federation and the Russian Foundation for Basic Research; the Slovenian Research Agency; Ikerbasque, Basque Foundation for Science and the Euskal Herriko Unibertsitatea (UPV/EHU) under program UFI 11/55 (Spain); the Swiss National Science Foundation; the Ministry of Education and the Ministry of Science and Technology of Taiwan; the U.S. Department of Energy and the National Science Foundation.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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