Measurement of the Absolute Branching Fraction of the Inclusive Decay Λ_{c}^{+}→Λ+X

M Ablikim¹, M N Achasov², S Ahmed³, M Albrecht⁴, M Alekseev^{5

6}, A Amoroso^{5

6}, F F An¹, Q An^{7

8}, J Z Bai¹, Y Bai⁹, O Bakina¹⁰, R Baldini Ferroli¹¹, Y Ban¹², D W Bennett¹³, J V Bennett¹⁴, N Berger¹⁵, M Bertani¹¹, D Bettoni¹⁶, J M Bian¹⁷, F Bianchi^{5

6}, E Boger¹⁰, I Boyko¹⁰, R A Briere¹⁴, H Cai¹⁸, X Cai^{1

7}, O Cakir¹⁹, A Calcaterra¹¹, G F Cao^{1

20}, S A Cetin²¹, J Chai⁶, J F Chang^{1

7}, G Chelkov¹⁰, G Chen¹, H S Chen^{1

20}, J C Chen¹, M L Chen^{1

7}, P L Chen²², S J Chen²³, X R Chen²⁴, Y B Chen^{1

7}, X K Chu¹², G Cibinetto¹⁶, H L Dai^{1

7}, J P Dai²⁵, A Dbeyssi³, D Dedovich¹⁰, Z Y Deng¹, A Denig¹⁵, I Denysenko¹⁰, M Destefanis^{5

6}, F De Mori^{5

6}, Y Ding²⁶, C Dong²⁷, J Dong^{1

7}, L Y Dong^{1

20}, M Y Dong^{1

7

20}, Z L Dou²³, S X Du²⁸, P F Duan¹, J Fang^{1

7}, S S Fang^{1

20}, X Fang^{7

8}, Y Fang¹, R Farinelli^{16

29}, L Fava^{30

6}, S Fegan¹⁵, F Feldbauer¹⁵, G Felici¹¹, C Q Feng^{7

8}, E Fioravanti¹⁶, M Fritsch^{3

15}, C D Fu¹, Q Gao¹, X L Gao^{7

8}, Y Gao³¹, Y G Gao³², Z Gao^{7

8}, B Garillon¹⁵, I Garzia¹⁶, K Goetzen³³, L Gong²⁷, W X Gong^{1

7}, W Gradl¹⁵, M Greco^{5

6}, M H Gu^{1

7}, S Gu³⁴, Y T Gu³⁵, A Q Guo¹, L B Guo³⁶, R P Guo^{1

20}, Y P Guo¹⁵, Z Haddadi³⁷, S Han¹⁸, X Q Hao³⁴, F A Harris³⁸, K L He^{1

20}, X Q He³⁹, F H Heinsius⁴, T Held⁴, Y K Heng^{1

7

20}, T Holtmann⁴, Z L Hou¹, C Hu³⁶, H M Hu^{1

20}, T Hu^{1

7

20}, Y Hu¹, G S Huang^{7

8}, J S Huang³⁴, X T Huang⁴⁰, X Z Huang²³, Z L Huang²⁶, T Hussain⁴¹, W Ikegami Andersson⁴², Q Ji¹, Q P Ji³⁴, X B Ji^{1

20}, X L Ji^{1

7}, X S Jiang^{1

7

20}, X Y Jiang²⁷, J B Jiao⁴⁰, Z Jiao⁴³, D P Jin^{1

7

20}, S Jin^{1

20}, Y Jin⁴⁴, T Johansson⁴², A Julin¹⁷, N Kalantar-Nayestanaki³⁷, X L Kang¹, X S Kang²⁷, M Kavatsyuk³⁷, B C Ke¹⁴, T Khan^{7

8}, A Khoukaz⁴⁵, P Kiese¹⁵, R Kliemt³³, L Koch⁴⁶, O B Kolcu²¹, B Kopf⁴, M Kornicer³⁸, M Kuemmel⁴, M Kuessner⁴, M Kuhlmann⁴, A Kupsc⁴², W Kühn⁴⁶, J S Lange⁴⁶, M Lara¹³, P Larin³, L Lavezzi⁶, S Leiber⁴, H Leithoff¹⁵, C Leng⁶, C Li⁴², Cheng Li^{7

8}, D M Li²⁸, F Li^{1

7}, F Y Li¹², G Li¹, H B Li^{1

20}, H J Li^{1

20}, J C Li¹, K J Li⁴⁷, Kang Li⁴⁸, Ke Li⁴⁰, Lei Li⁴⁹, P L Li^{7

8}, P R Li^{50

20}, Q Y Li⁴⁰, T Li⁴⁰, W D Li^{1

20}, W G Li¹, X L Li⁴⁰, X N Li^{1

7}, X Q Li²⁷, Z B Li⁴⁷, H Liang^{7

8}, Y F Liang⁵¹, Y T Liang⁴⁶, G R Liao⁵², D X Lin³, B Liu²⁵, B J Liu¹, C X Liu¹, D Liu^{7

8}, F H Liu⁵³, Fang Liu¹, Feng Liu³², H B Liu³⁵, H M Liu^{1

20}, Huanhuan Liu¹, Huihui Liu⁵⁴, J B Liu^{7

8}, J Y Liu^{1

20}, K Liu³¹, K Y Liu²⁶, Ke Liu³², L D Liu¹², P L Liu^{1

7}, Q Liu²⁰, S B Liu^{7

8}, X Liu²⁴, Y B Liu²⁷, Z A Liu^{1

7

20}, Zhiqing Liu¹⁵, Y F Long¹², X C Lou^{1

7

20}, H J Lu⁴³, J G Lu^{1

7}, Y Lu¹, Y P Lu^{1

7}, C L Luo³⁶, M X Luo⁵⁵, X L Luo^{1

7}, X R Lyu²⁰, F C Ma²⁶, H L Ma¹, L L Ma⁴⁰, M M Ma^{1

20}, Q M Ma¹, T Ma¹, X N Ma²⁷, X Y Ma^{1

7}, Y M Ma⁴⁰, F E Maas³, M Maggiora^{5

6}, Q A Malik⁴¹, Y J Mao¹², Z P Mao¹, S Marcello^{5

6}, Z X Meng⁴⁴, J G Messchendorp³⁷, G Mezzadri²⁹, J Min^{1

7}, T J Min¹, R E Mitchell¹³, X H Mo^{1

7

20}, Y J Mo³², C Morales Morales³, G Morello¹¹, N Yu Muchnoi², H Muramatsu¹⁷, A Mustafa⁴, Y Nefedov¹⁰, F Nerling³³, I B Nikolaev², Z Ning^{1

7}, S Nisar⁵⁶, S L Niu^{1

7}, X Y Niu^{1

20}, S L Olsen⁵⁷, Q Ouyang^{1

7

20}, S Pacetti⁵⁸, Y Pan^{7

8}, M Papenbrock⁴², P Patteri¹¹, M Pelizaeus⁴, J Pellegrino^{5

6}, H P Peng^{7

8}, K Peters³³, J Pettersson⁴², J L Ping³⁶, R G Ping^{1

20}, A Pitka¹⁵, R Poling¹⁷, V Prasad^{7

8}, H R Qi⁵⁹, M Qi²³, T Y Qi⁵⁹, S Qian^{1

7}, C F Qiao²⁰, N Qin¹⁸, X S Qin⁴, Z H Qin^{1

7}, J F Qiu¹, K H Rashid⁴¹, C F Redmer¹⁵, M Richter⁴, M Ripka¹⁵, M Rolo⁶, G Rong^{1

20}, Ch Rosner³, X D Ruan³⁵, A Sarantsev¹⁰, M Savrié²⁹, C Schnier⁴, K Schoenning⁴², W Shan¹², M Shao^{7

8}, C P Shen⁵⁹, P X Shen²⁷, X Y Shen^{1

20}, H Y Sheng¹, J J Song⁴⁰, W M Song⁴⁰, X Y Song¹, S Sosio^{5

6}, C Sowa⁴, S Spataro^{5

6}, G X Sun¹, J F Sun³⁴, L Sun¹⁸, S S Sun^{1

20}, X H Sun¹, Y J Sun^{7

8}, Y K Sun^{7

8}, Y Z Sun¹, Z J Sun^{1

7}, Z T Sun¹³, C J Tang⁵¹, G Y Tang¹, X Tang¹, I Tapan⁶⁰, M Tiemens³⁷, B Tsednee⁶¹, I Uman⁶², G S Varner³⁸, B Wang¹, B L Wang²⁰, D Wang¹², D Y Wang¹², Dan Wang²⁰, K Wang^{1

7}, L L Wang¹, L S Wang¹, M Wang⁴⁰, Meng Wang^{1

20}, P Wang¹, P L Wang¹, W P Wang^{7

8}, X F Wang³¹, Y Wang⁶³, Y D Wang³, Y F Wang^{1

7

20}, Y Q Wang¹⁵, Z Wang^{1

7}, Z G Wang^{1

7}, Z H Wang^{7

8}, Z Y Wang¹, Zongyuan Wang^{1

20}, T Weber¹⁵, D H Wei⁵², P Weidenkaff¹⁵, S P Wen¹, U Wiedner⁴, M Wolke⁴², L H Wu¹, L J Wu^{1

20}, Z Wu^{1

7}, L Xia^{7

8}, X Xia⁴⁰, Y Xia⁶⁴, D Xiao¹, H Xiao²², Y J Xiao^{1

20}, Z J Xiao³⁶, Y G Xie^{1

7}, Y H Xie³², X A Xiong^{1

20}, Q L Xiu^{1

7}, G F Xu¹, J J Xu^{1

20}, L Xu¹, Q J Xu⁴⁸, Q N Xu²⁰, X P Xu⁶³, L Yan^{5

6}, W B Yan^{7

8}, W C Yan⁵⁹, W C Yan^{7

8}, Y H Yan⁶⁴, H J Yang²⁵, H X Yang¹, L Yang¹⁸, Y H Yang²³, Y X Yang⁵², Yifan Yang^{1

20}, M Ye^{1

7}, M H Ye⁵⁰, J H Yin¹, Z Y You⁴⁷, B X Yu^{1

7

20}, C X Yu²⁷, J S Yu²⁴, C Z Yuan^{1

20}, Y Yuan¹, A Yuncu²¹, A A Zafar⁴¹, A Zallo¹¹, Y Zeng⁶⁴, Z Zeng^{7

8}, B X Zhang¹, B Y Zhang^{1

7}, C C Zhang¹, D H Zhang¹, H H Zhang⁴⁷, H Y Zhang^{1

7}, J Zhang^{1

20}, J L Zhang¹, J Q Zhang¹, J W Zhang^{1

7

20}, J Y Zhang¹, J Z Zhang^{1

20}, K Zhang^{1

20}, L Zhang³¹, S Q Zhang²⁷, X Y Zhang⁴⁰, Y H Zhang^{1

7}, Y T Zhang^{7

8}, Yang Zhang¹, Yao Zhang¹, Yu Zhang²⁰, Z H Zhang³², Z P Zhang⁸, Z Y Zhang¹⁸, G Zhao¹, J W Zhao^{1

7}, J Y Zhao^{1

20}, J Z Zhao^{1

7}, Lei Zhao^{7

8}, Ling Zhao¹, M G Zhao²⁷, Q Zhao¹, S J Zhao²⁸, T C Zhao¹, Y B Zhao^{1

7}, Z G Zhao^{7

8}, A Zhemchugov¹⁰, B Zheng²², J P Zheng^{1

7}, W J Zheng⁴⁰, Y H Zheng²⁰, B Zhong³⁶, L Zhou^{1

7}, X Zhou¹⁸, X K Zhou^{7

8}, X R Zhou^{7

8}, X Y Zhou¹, Y X Zhou³⁵, J Zhu²⁷, J Zhu⁴⁷, K Zhu¹, K J Zhu^{1

7

20}, S Zhu¹, S H Zhu³⁹, X L Zhu³¹, Y C Zhu^{7

8}, Y S Zhu^{1

20}, Z A Zhu^{1

20}, J Zhuang^{1

7}, B S Zou¹, J H Zou¹; BESIII Collaboration

Affiliations

¹ Institute of High Energy Physics, Beijing 100049, People's Republic of China.
² G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
³ Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
⁴ Bochum Ruhr-University, D-44780 Bochum, Germany.
⁵ University of Turin, I-10125, Turin, Italy.
⁶ INFN, I-10125, Turin, Italy.
⁷ State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
⁸ University of Science and Technology of China, Hefei 230026, People's Republic of China.
⁹ Southeast University, Nanjing 211100, People's Republic of China.
¹⁰ Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
¹¹ INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy.
¹² Peking University, Beijing 100871, People's Republic of China.
¹³ Indiana University, Bloomington, Indiana 47405, USA.
¹⁴ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
¹⁵ Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
¹⁶ INFN Sezione di Ferrara, I-44122, Ferrara, Italy.
¹⁷ University of Minnesota, Minneapolis, Minnesota 55455, USA.
¹⁸ Wuhan University, Wuhan 430072, People's Republic of China.
¹⁹ Ankara University, 06100 Tandogan, Ankara, Turkey.
²⁰ University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
²¹ Istanbul Bilgi University, 34060 Eyup, Istanbul, Turkey.
²² University of South China, Hengyang 421001, People's Republic of China.
²³ Nanjing University, Nanjing 210093, People's Republic of China.
²⁴ Lanzhou University, Lanzhou 730000, People's Republic of China.
²⁵ Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
²⁶ Liaoning University, Shenyang 110036, People's Republic of China.
²⁷ Nankai University, Tianjin 300071, People's Republic of China.
²⁸ Zhengzhou University, Zhengzhou 450001, People's Republic of China.
²⁹ University of Ferrara, I-44122, Ferrara, Italy.
³⁰ University of Eastern Piedmont, I-15121, Alessandria, Italy.
³¹ Tsinghua University, Beijing 100084, People's Republic of China.
³² Central China Normal University, Wuhan 430079, People's Republic of China.
³³ GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany.
³⁴ Henan Normal University, Xinxiang 453007, People's Republic of China.
³⁵ Guangxi University, Nanning 530004, People's Republic of China.
³⁶ Nanjing Normal University, Nanjing 210023, People's Republic of China.
³⁷ KVI-CART, University of Groningen, NL-9747 AA Groningen, The Netherlands.
³⁸ University of Hawaii, Honolulu, Hawaii 96822, USA.
³⁹ University of Science and Technology Liaoning, Anshan 114051, People's Republic of China.
⁴⁰ Shandong University, Jinan 250100, People's Republic of China.
⁴¹ University of the Punjab, Lahore-54590, Pakistan.
⁴² Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
⁴³ Huangshan College, Huangshan 245000, People's Republic of China.
⁴⁴ University of Jinan, Jinan 250022, People's Republic of China.
⁴⁵ University of Muenster, Wilhelm-Klemm-Str. 9, 48149 Muenster, Germany.
⁴⁶ Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany.
⁴⁷ Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
⁴⁸ Hangzhou Normal University, Hangzhou 310036, People's Republic of China.
⁴⁹ Beijing Institute of Petrochemical Technology, Beijing 102617, People's Republic of China.
⁵⁰ China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China.
⁵¹ Sichuan University, Chengdu 610064, People's Republic of China.
⁵² Guangxi Normal University, Guilin 541004, People's Republic of China.
⁵³ Shanxi University, Taiyuan 030006, People's Republic of China.
⁵⁴ Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
⁵⁵ Zhejiang University, Hangzhou 310027, People's Republic of China.
⁵⁶ COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan.
⁵⁷ Seoul National University, Seoul, 151-747 Korea.
⁵⁸ INFN and University of Perugia, I-06100, Perugia, Italy.
⁵⁹ Beihang University, Beijing 100191, People's Republic of China.
⁶⁰ Uludag University, 16059 Bursa, Turkey.
⁶¹ Institute of Physics and Technology, Peace Ave. 54B, Ulaanbaatar 13330, Mongolia.
⁶² Near East University, Nicosia, North Cyprus, Mersin 10, Turkey.
⁶³ Soochow University, Suzhou 215006, People's Republic of China.
⁶⁴ Hunan University, Changsha 410082, People's Republic of China.

PMID: 30141643
DOI: 10.1103/PhysRevLett.121.062003

Free article

Measurement of the Absolute Branching Fraction of the Inclusive Decay Λ_{c}^{+}→Λ+X

M Ablikim et al. Phys Rev Lett. 2018.

Free article

. 2018 Aug 10;121(6):062003.

doi: 10.1103/PhysRevLett.121.062003.

Authors

Affiliations

¹ Institute of High Energy Physics, Beijing 100049, People's Republic of China.
² G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
³ Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
⁴ Bochum Ruhr-University, D-44780 Bochum, Germany.
⁵ University of Turin, I-10125, Turin, Italy.
⁶ INFN, I-10125, Turin, Italy.
⁷ State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
⁸ University of Science and Technology of China, Hefei 230026, People's Republic of China.
⁹ Southeast University, Nanjing 211100, People's Republic of China.
¹⁰ Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
¹¹ INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy.
¹² Peking University, Beijing 100871, People's Republic of China.
¹³ Indiana University, Bloomington, Indiana 47405, USA.
¹⁴ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
¹⁵ Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
¹⁶ INFN Sezione di Ferrara, I-44122, Ferrara, Italy.
¹⁷ University of Minnesota, Minneapolis, Minnesota 55455, USA.
¹⁸ Wuhan University, Wuhan 430072, People's Republic of China.
¹⁹ Ankara University, 06100 Tandogan, Ankara, Turkey.
²⁰ University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
²¹ Istanbul Bilgi University, 34060 Eyup, Istanbul, Turkey.
²² University of South China, Hengyang 421001, People's Republic of China.
²³ Nanjing University, Nanjing 210093, People's Republic of China.
²⁴ Lanzhou University, Lanzhou 730000, People's Republic of China.
²⁵ Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
²⁶ Liaoning University, Shenyang 110036, People's Republic of China.
²⁷ Nankai University, Tianjin 300071, People's Republic of China.
²⁸ Zhengzhou University, Zhengzhou 450001, People's Republic of China.
²⁹ University of Ferrara, I-44122, Ferrara, Italy.
³⁰ University of Eastern Piedmont, I-15121, Alessandria, Italy.
³¹ Tsinghua University, Beijing 100084, People's Republic of China.
³² Central China Normal University, Wuhan 430079, People's Republic of China.
³³ GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany.
³⁴ Henan Normal University, Xinxiang 453007, People's Republic of China.
³⁵ Guangxi University, Nanning 530004, People's Republic of China.
³⁶ Nanjing Normal University, Nanjing 210023, People's Republic of China.
³⁷ KVI-CART, University of Groningen, NL-9747 AA Groningen, The Netherlands.
³⁸ University of Hawaii, Honolulu, Hawaii 96822, USA.
³⁹ University of Science and Technology Liaoning, Anshan 114051, People's Republic of China.
⁴⁰ Shandong University, Jinan 250100, People's Republic of China.
⁴¹ University of the Punjab, Lahore-54590, Pakistan.
⁴² Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
⁴³ Huangshan College, Huangshan 245000, People's Republic of China.
⁴⁴ University of Jinan, Jinan 250022, People's Republic of China.
⁴⁵ University of Muenster, Wilhelm-Klemm-Str. 9, 48149 Muenster, Germany.
⁴⁶ Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany.
⁴⁷ Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
⁴⁸ Hangzhou Normal University, Hangzhou 310036, People's Republic of China.
⁴⁹ Beijing Institute of Petrochemical Technology, Beijing 102617, People's Republic of China.
⁵⁰ China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China.
⁵¹ Sichuan University, Chengdu 610064, People's Republic of China.
⁵² Guangxi Normal University, Guilin 541004, People's Republic of China.
⁵³ Shanxi University, Taiyuan 030006, People's Republic of China.
⁵⁴ Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
⁵⁵ Zhejiang University, Hangzhou 310027, People's Republic of China.
⁵⁶ COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan.
⁵⁷ Seoul National University, Seoul, 151-747 Korea.
⁵⁸ INFN and University of Perugia, I-06100, Perugia, Italy.
⁵⁹ Beihang University, Beijing 100191, People's Republic of China.
⁶⁰ Uludag University, 16059 Bursa, Turkey.
⁶¹ Institute of Physics and Technology, Peace Ave. 54B, Ulaanbaatar 13330, Mongolia.
⁶² Near East University, Nicosia, North Cyprus, Mersin 10, Turkey.
⁶³ Soochow University, Suzhou 215006, People's Republic of China.
⁶⁴ Hunan University, Changsha 410082, People's Republic of China.

PMID: 30141643
DOI: 10.1103/PhysRevLett.121.062003

Abstract

Based on an e^{+}e^{-} collision data sample corresponding to an integrated luminosity of 567 pb^{-1} taken at the center-of-mass energy of sqrt[s]=4.6 GeV with the BESIII detector, we measure the absolute branching fraction of the inclusive decay Λ_{c}^{+}→Λ+X to be B(Λ_{c}^{+}→Λ+X)=(38.2_{-2.2}^{+2.8}±0.9)% using the double-tag method, where X refers to any possible final state particles. In addition, we search for direct CP violation in the charge asymmetry of this inclusive decay for the first time, and obtain A_{CP}≡[B(Λ_{c}^{+}→Λ+X)-B(Λ[over ¯]_{c}^{-}→Λ[over ¯]+X)]/[B(Λ_{c}^{+}→Λ+X)+B(Λ[over ¯]_{c}^{-}→Λ[over ¯]+X)]=(2.1_{-6.6}^{+7.0}±1.6)%, a statistically limited result with no evidence of CP violation.

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Measurement of the Absolute Branching Fraction of the Inclusive Decay Λ_{c}^{+}→Λ+X

Affiliations

Measurement of the Absolute Branching Fraction of the Inclusive Decay Λ_{c}^{+}→Λ+X

Authors

Affiliations

Abstract

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