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Title: Measurements of the Branching Fractions of the Semileptonic Decays Ξ c 0 → Ξ − ℓ + ν ℓ and the Asymmetry Parameter of Ξ c 0 → Ξ − π +

Abstract

Using data samples of 89.5 and 711 fb-1 recorded at energies of √s = 10.52 and 10.58 GeV, respectively, with the Belle detector at the KEKB e+e- collider, we report measurements of branching fractions of semileptonic decays Ξ$$^{0}_{c}$$ → Ξ-ℓ+νℓ (ℓ = e or μ) and the CP-asymmetry parameter of Ξ$$^{0}_{c}$$ → Ξ-π+ decay. The branching fractions are measured to be B(Ξ$$^{0}_{c}$$ → Ξ-e+νe) =(1.31 ± 0.04 ± 0.07 ± 0.38)% and B(Ξ$$^{0}_{c}$$ → Ξ-μ+νμ) = (1.27 ± 0.06 ± 0.10 ± 0.37)%, and the decay parameter αΞπ is measured to be 0.63 ± 0.03 ± 0.01 with much improved precision compared to the current world average. The corresponding ratio B(Ξ$$^{0}_{c}$$ → Ξ-e+νe)/B(Ξ$$^{0}_{c}$$ → Ξ-μ+νμ) is 1.03 ± 0.05 ± 0.07, which is consistent with the expectation of lepton flavor universality.

Authors:
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Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Belle Collaboration
OSTI Identifier:
1821029
Alternate Identifier(s):
OSTI ID: 1828885; OSTI ID: 1837921
Report Number(s):
BNL-222358-2021-JAAM
Journal ID: ISSN 0031-9007; PRLTAO; 121803
Grant/Contract Number:  
SC0012704; SC0009973
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 127 Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Leptonic, semileptonic & radiative decays; Charmed baryons; Lepton colliders; CP violation; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Li, Y. B., Shen, C. P., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Behera, P., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswal, J., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Campajola, M., Červenkov, D., Chang, M. -C., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Cho, S. -J., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., Dash, N., De Nardo, G., Dhamija, R., Di Capua, F., Dong, T. V., Eidelman, S., Epifanov, D., Ferber, T., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Grzymkowska, O., Gudkova, K., Hadjivasiliou, C., Hartbrich, O., Hayasaka, K., Hayashii, H., Hernandez Villanueva, M., Hsu, C. -L., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jia, S., Jin, Y., Joo, C. W., Joo, K. K., Kang, K. H., Karyan, G., Kato, Y., Kichimi, H., Kim, C. H., Kim, D. Y., Kim, K. -H., Kim, S. H., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y. -J., Lalwani, K., Lange, J. S., Lee, I. S., Lee, S. C., Li, C. H., Li, L. K., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matvienko, D., McNeil, J. T., Metzner, F., Mizuk, R., Mohanty, G. B., Moon, T. J., Mori, T., Mussa, R., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, S., Ono, H., Onuki, Y., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Popov, V., Prencipe, E., Prim, M. T., Röhrken, M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sakai, Y., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Shapkin, M., Sharma, C., Shiu, J. -G., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Uno, K., Uno, S., Usov, Y., Van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Watanabe, M., Watanuki, S., Won, E., Xu, X., Yan, W., Yang, S. B., Ye, H., Yin, J. H., Yuan, C. Z., Zhang, Z. P., Zhilich, V., Zhukova, V., and Belle Collaboration. Measurements of the Branching Fractions of the Semileptonic Decays Ξ c 0 → Ξ − ℓ + ν ℓ and the Asymmetry Parameter of Ξ c 0 → Ξ − π +. United States: N. p., 2021. Web. doi:10.1103/PhysRevLett.127.121803.
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Li, Y. B., Shen, C. P., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Behera, P., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswal, J., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Campajola, M., Červenkov, D., Chang, M. -C., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Cho, S. -J., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., Dash, N., De Nardo, G., Dhamija, R., Di Capua, F., Dong, T. V., Eidelman, S., Epifanov, D., Ferber, T., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Grzymkowska, O., Gudkova, K., Hadjivasiliou, C., Hartbrich, O., Hayasaka, K., Hayashii, H., Hernandez Villanueva, M., Hsu, C. -L., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jia, S., Jin, Y., Joo, C. W., Joo, K. K., Kang, K. H., Karyan, G., Kato, Y., Kichimi, H., Kim, C. H., Kim, D. Y., Kim, K. -H., Kim, S. H., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y. -J., Lalwani, K., Lange, J. S., Lee, I. S., Lee, S. C., Li, C. H., Li, L. K., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matvienko, D., McNeil, J. T., Metzner, F., Mizuk, R., Mohanty, G. B., Moon, T. J., Mori, T., Mussa, R., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, S., Ono, H., Onuki, Y., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Popov, V., Prencipe, E., Prim, M. T., Röhrken, M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sakai, Y., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Shapkin, M., Sharma, C., Shiu, J. -G., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Uno, K., Uno, S., Usov, Y., Van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Watanabe, M., Watanuki, S., Won, E., Xu, X., Yan, W., Yang, S. B., Ye, H., Yin, J. H., Yuan, C. Z., Zhang, Z. P., Zhilich, V., Zhukova, V., & Belle Collaboration. Measurements of the Branching Fractions of the Semileptonic Decays Ξ c 0 → Ξ − ℓ + ν ℓ and the Asymmetry Parameter of Ξ c 0 → Ξ − π +. United States. https://doi.org/10.1103/PhysRevLett.127.121803
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Li, Y. B., Shen, C. P., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Behera, P., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswal, J., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Campajola, M., Červenkov, D., Chang, M. -C., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Cho, S. -J., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., Dash, N., De Nardo, G., Dhamija, R., Di Capua, F., Dong, T. V., Eidelman, S., Epifanov, D., Ferber, T., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Grzymkowska, O., Gudkova, K., Hadjivasiliou, C., Hartbrich, O., Hayasaka, K., Hayashii, H., Hernandez Villanueva, M., Hsu, C. -L., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jia, S., Jin, Y., Joo, C. W., Joo, K. K., Kang, K. H., Karyan, G., Kato, Y., Kichimi, H., Kim, C. H., Kim, D. Y., Kim, K. -H., Kim, S. H., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y. -J., Lalwani, K., Lange, J. S., Lee, I. S., Lee, S. C., Li, C. H., Li, L. K., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matvienko, D., McNeil, J. T., Metzner, F., Mizuk, R., Mohanty, G. B., Moon, T. J., Mori, T., Mussa, R., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, S., Ono, H., Onuki, Y., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Popov, V., Prencipe, E., Prim, M. T., Röhrken, M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sakai, Y., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Shapkin, M., Sharma, C., Shiu, J. -G., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Uno, K., Uno, S., Usov, Y., Van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Watanabe, M., Watanuki, S., Won, E., Xu, X., Yan, W., Yang, S. B., Ye, H., Yin, J. H., Yuan, C. Z., Zhang, Z. P., Zhilich, V., Zhukova, V., and Belle Collaboration. Fri . "Measurements of the Branching Fractions of the Semileptonic Decays Ξ c 0 → Ξ − ℓ + ν ℓ and the Asymmetry Parameter of Ξ c 0 → Ξ − π +". United States. https://doi.org/10.1103/PhysRevLett.127.121803.
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@article{osti_1821029,
title = {Measurements of the Branching Fractions of the Semileptonic Decays Ξ c 0 → Ξ − ℓ + ν ℓ and the Asymmetry Parameter of Ξ c 0 → Ξ − π +},
author = {Li, Y. B. and Shen, C. P. and Adachi, I. and Adamczyk, K. and Aihara, H. and Al Said, S. and Asner, D. M. and Aushev, T. and Ayad, R. and Babu, V. and Behera, P. and Bennett, J. and Bessner, M. and Bhardwaj, V. and Bhuyan, B. and Bilka, T. and Biswal, J. and Bonvicini, G. and Bozek, A. and Bračko, M. and Browder, T. E. and Campajola, M. and Červenkov, D. and Chang, M. -C. and Chen, A. and Cheon, B. G. and Chilikin, K. and Cho, K. and Cho, S. -J. and Choi, S. -K. and Choi, Y. and Choudhury, S. and Cinabro, D. and Cunliffe, S. and Das, S. and Dash, N. and De Nardo, G. and Dhamija, R. and Di Capua, F. and Dong, T. V. and Eidelman, S. and Epifanov, D. and Ferber, T. and Fulsom, B. G. and Garg, R. and Gaur, V. and Gabyshev, N. and Garmash, A. and Giri, A. and Goldenzweig, P. and Grzymkowska, O. and Gudkova, K. and Hadjivasiliou, C. and Hartbrich, O. and Hayasaka, K. and Hayashii, H. and Hernandez Villanueva, M. and Hsu, C. -L. and Ishikawa, A. and Itoh, R. and Iwasaki, M. and Iwasaki, Y. and Jacobs, W. W. and Jia, S. and Jin, Y. and Joo, C. W. and Joo, K. K. and Kang, K. H. and Karyan, G. and Kato, Y. and Kichimi, H. and Kim, C. H. and Kim, D. Y. and Kim, K. -H. and Kim, S. H. and Kinoshita, K. and Kodyš, P. and Konno, T. and Korobov, A. and Korpar, S. and Kovalenko, E. and Križan, P. and Kroeger, R. and Krokovny, P. and Kuhr, T. and Kumar, M. and Kumar, R. and Kumara, K. and Kuzmin, A. and Kwon, Y. -J. and Lalwani, K. and Lange, J. S. and Lee, I. S. and Lee, S. C. and Li, C. H. and Li, L. K. and Li Gioi, L. and Libby, J. and Lieret, K. and Liventsev, D. and Masuda, M. and Matvienko, D. and McNeil, J. T. and Metzner, F. and Mizuk, R. and Mohanty, G. B. and Moon, T. J. and Mori, T. and Mussa, R. and Natochii, A. and Nayak, L. and Nayak, M. and Niiyama, M. and Nisar, N. K. and Nishida, S. and Nishimura, K. and Ogawa, S. and Ono, H. and Onuki, Y. and Pakhlov, P. and Pakhlova, G. and Pang, T. and Pardi, S. and Park, H. and Patra, S. and Paul, S. and Pedlar, T. K. and Pestotnik, R. and Piilonen, L. E. and Podobnik, T. and Popov, V. and Prencipe, E. and Prim, M. T. and Röhrken, M. and Rostomyan, A. and Rout, N. and Russo, G. and Sahoo, D. and Sakai, Y. and Sandilya, S. and Santelj, L. and Sanuki, T. and Savinov, V. and Schnell, G. and Schwanda, C. and Seino, Y. and Senyo, K. and Shapkin, M. and Sharma, C. and Shiu, J. -G. and Sokolov, A. and Solovieva, E. and Starič, M. and Stottler, Z. S. and Sumihama, M. and Tamponi, U. and Tanida, K. and Tenchini, F. and Uchida, M. and Uehara, S. and Uglov, T. and Uno, K. and Uno, S. and Usov, Y. and Van Tonder, R. and Varner, G. and Vinokurova, A. and Vossen, A. and Wang, C. H. and Wang, M. -Z. and Wang, P. and Wang, X. L. and Watanabe, M. and Watanuki, S. and Won, E. and Xu, X. and Yan, W. and Yang, S. B. and Ye, H. and Yin, J. H. and Yuan, C. Z. and Zhang, Z. P. and Zhilich, V. and Zhukova, V. and Belle Collaboration},
abstractNote = {Using data samples of 89.5 and 711 fb-1 recorded at energies of √s = 10.52 and 10.58 GeV, respectively, with the Belle detector at the KEKB e+e- collider, we report measurements of branching fractions of semileptonic decays Ξ$^{0}_{c}$ → Ξ-ℓ+νℓ (ℓ = e or μ) and the CP-asymmetry parameter of Ξ$^{0}_{c}$ → Ξ-π+ decay. The branching fractions are measured to be B(Ξ$^{0}_{c}$ → Ξ-e+νe) =(1.31 ± 0.04 ± 0.07 ± 0.38)% and B(Ξ$^{0}_{c}$ → Ξ-μ+νμ) = (1.27 ± 0.06 ± 0.10 ± 0.37)%, and the decay parameter αΞπ is measured to be 0.63 ± 0.03 ± 0.01 with much improved precision compared to the current world average. The corresponding ratio B(Ξ$^{0}_{c}$ → Ξ-e+νe)/B(Ξ$^{0}_{c}$ → Ξ-μ+νμ) is 1.03 ± 0.05 ± 0.07, which is consistent with the expectation of lepton flavor universality.},
doi = {10.1103/PhysRevLett.127.121803},
journal = {Physical Review Letters},
number = 12,
volume = 127,
place = {United States},
year = {2021},
month = {9}
}
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  • Progress of Theoretical and Experimental Physics, Vol. 2020, Issue 8
  • DOI: 10.1093/ptep/ptaa104

Measurement of the Absolute Branching Fraction of the Inclusive Decay Λ c + → Λ + X
journal, August 2018

Cabibbo-favored nonleptonic decays of charmed baryons
journal, July 1992

Violation of CP in variance, C asymmetry, and baryon asymmetry of the universe
journal, May 1991

Search for Lepton-Universality Violation in B + → K + ℓ + ℓ − Decays
journal, May 2019

Observation of CP violation in <mml:math altimg="si1.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:msup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup><mml:mo>→</mml:mo><mml:mi>D</mml:mi><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:math> decays
journal, June 2012

Signals of CP nonconservation in hyperon decay
journal, July 1985

Strong CP violation in spin-1/2 singly charmed baryons
journal, January 2021

Nonleptonic weak decays of charmed baryons
journal, August 1992

Light cone QCD sum rules study of the semileptonic heavy ΞQ and Ξ′Q transitions to Ξ and Σ baryons
journal, January 2012

Evidence for the 2 π Decay of the K 2 0 Meson
journal, July 1964

Achievements of KEKB
journal, January 2013

  • Abe, T.; Akai, K.; Akasaka, N.
  • Progress of Theoretical and Experimental Physics, Vol. 2013, Issue 3
  • DOI: 10.1093/ptep/pts102

Muon identification in the Belle experiment at KEKB
journal, September 2002

  • Abashian, A.; Abe, K.; Abe, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 491, Issue 1-2
  • DOI: 10.1016/S0168-9002(02)01164-6

Improved Measurement of the Form Factors in the Decay Λ c + → Λ e + ν e
journal, May 2005

First Measurements of Absolute Branching Fractions of the Ξ c 0 Baryon at Belle
journal, February 2019

Belle PID
journal, November 2002

  • Nakano, E.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 494, Issue 1-3
  • DOI: 10.1016/S0168-9002(02)01510-3

Explaining dark matter and B decay anomalies with an L μ − L τ model
journal, December 2016

  • Altmannshofer, Wolfgang; Gori, Stefania; Profumo, Stefano
  • Journal of High Energy Physics, Vol. 2016, Issue 12
  • DOI: 10.1007/JHEP12(2016)106

Simultaneous explanation of R(D (∗)) and b→sμ + μ −: the last scalar leptoquarks standing
journal, September 2017

  • Crivellin, Andreas; Müller, Dario; Ota, Toshihiko
  • Journal of High Energy Physics, Vol. 2017, Issue 9
  • DOI: 10.1007/JHEP09(2017)040

Overview of the KEKB accelerators
journal, February 2003

  • Kurokawa, S.; Kikutani, E.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 1
  • DOI: 10.1016/S0168-9002(02)01771-0

Measurement of C P Violation in the Phase Space of B ± → K ± π + π − and B ± → K ± K + K − Decays
journal, September 2013

Weak decays of heavy baryons in the light-front approach
journal, August 2018

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

Measurement of the Absolute Branching Fraction for Λ c + → Λ e + ν e
journal, November 2015

Measurement of the decay asymmetry parameters in Ξ c 0 → Ξ − π +
journal, April 2001

Measurement of the absolute branching fraction for Λ c + → Λ μ + ν μ
journal, April 2017

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