Measurement of the Λc+ Lifetime

The Belle II Collaboration

doi:10.1103/PhysRevLett.130.071802

Measurement of the Λc+ Lifetime

The Belle II Collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

An absolute measurement of the Λc+ lifetime is reported using Λc+→pK-π+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the δ(4S) resonance, is 207.2 fb-1. The result, τ(Λc+)=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

Original language	English
Article number	071802
Journal	Physical Review Letters
Volume	130
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.130.071802
State	Published - 17 Feb 2023

Funding

Funders	Funder number
Ministry of Education
Narodowe Centrum Nauki
Institut National de Physique Nucléaire et de Physique des Particules
Korea Research Environment Open Network
Akademi Sains Malaysia
Universiti Malaya
National Institute of Informatics
Korea Institute of Science and Technology Information
Bundesministerium für Bildung, Wissenschaft und Forschung
Instituto Nazionale di Fisica Nucleare
Thailand Center of Excellence in Physics
Department of Science and Technology, Ministry of Science and Technology, India
Centre National de la Recherche Scientifique
Max-Planck-Gesellschaft
Bundesministerium für Bildung und Forschung
Ministry of Education and Science of Ukraine
Helmholtz-Gemeinschaft
Canarie
Deutsche Forschungsgemeinschaft
European Commission
Ministry of Education and Science of the Russian Federation
CAS Center for Excellence in Particle Physics
Natural Sciences and Engineering Research Council of Canada
TUBITAK ULAKBIM
Horizon 2020 ERC-Advanced
National Research University Higher School of Economics
Compute Canada
European Research Council
Ministerstwo Edukacji i Nauki
Generalitat Valenciana, Spain
GLORIAD
Horizon 2020 ERC-Consolidator
Alexander von Humboldt-Stiftung
Ministry of Education, Culture, Sports, Science and Technology
Seventh Framework Programme	947006, 700525, 822070, 267104, 884719, 622527, 101026516, 1913789
Grantová Agentura České Republiky	22-18469S
Horizon 2020 Framework Programme	819127
National Research Foundation of Korea	2022R1A2C1003993, 2016R1D1A1B02012900, 2018R1A2B3003643, 2018R1D1A1B07047294, RS-2022-00197659, 2019R1I1A3A01058933, 2018R1A6A1A06024970
National Natural Science Foundation of China	11521505, 11761141009, 11975076, 11575017, 11705209, 11675166
Science Committee of the Republic of Armenia	20TTCG-1C010
Japan Society for the Promotion of Science	18H05226, 16H06492, 26400255, 18K03621, 22H00144, 19H00682, 26220706, 17H01133, 22K21347, 16K05323, 16H03993, 16H03968, 17H05405, 18H03710
Austrian Science Fund	P 31361, J 4625, P 31361-N36
Agencia Estatal de Investigación	RYC2020-029875-I
Shanghai Pujiang Program	18PJ1401000
National Science Foundation	PHY-2111604, PHY-1913789, 1913789
Australian Research Council	DP170102204, FT120100745, DP180102629, DP150103061, DE220100462, FT130100018, DP170102389, FT130100303
University of Tabuk	S-0280-1439, S-0256-1438
Javna Agencija za Raziskovalno Dejavnost RS	J1-9124, P1-0135
CIDEGENT/2018/020 Ministry of Science and Technology	MOST107-2119-M-002-035-MY3, MOST106-2112-M-002-005-MY3
Ministerstvo Školství, Mládeže a Tělovýchovy	LTT17020
Univerzita Karlova v Praze	SVV 260448
National Research Foundation of Ukraine	2020.02/0257
Seventh Framework	PIEF-GA-2013-622527
Israel Ministry of Science	3-16543
Chinese Academy of Sciences	QYZDJ-SSW-SLH011
Department of Atomic Energy, Government of India	RTI 4002
Vietnam Academy of Science and Technology	DL0000.05/21-23
U.S. Department of Energy	DE-SC0010007, DE-AC06-76RLO1830, DE-SC0010118, DE-SC0010504, DE-SC0012704, DE-SC0010073, DE-SC0011784, DE-SC0021274, DE-SC0022350, DE-SC0019230, DE-SC0009824, DE-SC0007983, DE-SC0009973
Horizon 2020 Marie Sklodowska-Curie	101026516
Liaoning Revitalization Talents Program	XLYC1807135
United States-Israel Binational Science Foundation	2016113
Ministry of Higher Education, Malaysia	237, FOINS-296, CB-180023, CB-254409, CB-236394, CB-221329
Israel Science Foundation	2476/17

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10.1103/PhysRevLett.130.071802

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title = "Measurement of the Λc+ Lifetime",

abstract = "An absolute measurement of the Λc+ lifetime is reported using Λc+→pK-π+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the δ(4S) resonance, is 207.2 fb-1. The result, τ(Λc+)=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.",

author = "{The Belle II Collaboration} and F. Abudin{\'e}n and L. Aggarwal and H. Ahmed and Ahn, {J. K.} and H. Aihara and N. Akopov and A. Aloisio and {Anh Ky}, N. and Asner, {D. M.} and H. Atmacan and T. Aushev and V. Aushev and V. Babu and H. Bae and P. Bambade and Sw Banerjee and S. Bansal and J. Baudot and M. Bauer and A. Baur and A. Beaubien and J. Becker and Bennett, {J. V.} and E. Bernieri and Bernlochner, {F. U.} and V. Bertacchi and M. Bertemes and E. Bertholet and M. Bessner and S. Bettarini and V. Bhardwaj and F. Bianchi and T. Bilka and D. Biswas and D. Bodrov and A. Bolz and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and P. Branchini and Briere, {R. A.} and Browder, {T. E.} and A. Budano and S. Bussino and M. Campajola and L. Cao and G. Casarosa and C. Cecchi and M. Nayak and A. Soffer",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. ",

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month = feb,

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doi = "10.1103/PhysRevLett.130.071802",

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AU - Akopov, N.

AU - Aloisio, A.

AU - Anh Ky, N.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Aushev, V.

AU - Babu, V.

AU - Bae, H.

AU - Bambade, P.

AU - Banerjee, Sw

AU - Bansal, S.

AU - Baudot, J.

AU - Bauer, M.

AU - Baur, A.

AU - Beaubien, A.

AU - Becker, J.

AU - Bennett, J. V.

AU - Bernieri, E.

AU - Bernlochner, F. U.

AU - Bertacchi, V.

AU - Bertemes, M.

AU - Bertholet, E.

AU - Bessner, M.

AU - Bettarini, S.

AU - Bhardwaj, V.

AU - Bianchi, F.

AU - Bilka, T.

AU - Biswas, D.

AU - Bodrov, D.

AU - Bolz, A.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Branchini, P.

AU - Briere, R. A.

AU - Browder, T. E.

AU - Budano, A.

AU - Bussino, S.

AU - Campajola, M.

AU - Cao, L.

AU - Casarosa, G.

AU - Cecchi, C.

AU - Nayak, M.

AU - Soffer, A.

PY - 2023/2/17

Y1 - 2023/2/17

N2 - An absolute measurement of the Λc+ lifetime is reported using Λc+→pK-π+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the δ(4S) resonance, is 207.2 fb-1. The result, τ(Λc+)=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

AB - An absolute measurement of the Λc+ lifetime is reported using Λc+→pK-π+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the δ(4S) resonance, is 207.2 fb-1. The result, τ(Λc+)=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

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JO - Physical Review Letters

JF - Physical Review Letters

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M1 - 071802

ER -

Measurement of the Λc+ Lifetime

Abstract

Funding

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