$Measurement of the Absolute Branching Fraction for Λ_{c}^{+}→Λe^{+}ν_{e}$

Measurement of the Absolute Branching Fraction for Λ_{c}^{+}→Λe^{+}ν_{e}

We report the first measurement of the absolute branching fraction for Λ_{c}^{+}→Λe^{+}ν_{e}. This measurement is based on 567 pb^{-1} of e^{+}e^{-} annihilation data produced at sqrt[s]=4.599 GeV, which is just above the Λ_{c}^{+}Λ[over ¯]_{c}^{-} threshold. The data were collected with the BESII...

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Veröffentlicht in:	Physical review letters 2015-11, Vol.115 (22), p.221805-221805
Hauptverfasser:	Ablikim, M, Achasov, M N, Ai, X C, Albayrak, O, Albrecht, M, Ambrose, D J, Amoroso, A, An, F F, An, Q, Bai, J Z, Baldini Ferroli, R, Ban, Y, Bennett, D W, Bennett, J V, Bertani, M, Bettoni, D, Bian, J M, Bianchi, F, Boger, E, Boyko, I, Briere, R A, Cai, H, Cai, X, Cakir, O, Calcaterra, A, Cao, G F, Cetin, S A, Chang, J F, Chelkov, G, Chen, G, Chen, H S, Chen, H Y, Chen, J C, Chen, M L, Chen, S J, Chen, X, Chen, X R, Chen, Y B, Cheng, H P, Chu, X K, Cibinetto, G, Dai, H L, Dai, J P, Dbeyssi, A, Dedovich, D, Deng, Z Y, Denig, A, Denysenko, I, Destefanis, M, De Mori, F, Ding, Y, Dong, C, Dong, J, Dong, L Y, Dong, M Y, Dou, Z L, Du, S X, Duan, P F, Fan, J Z, Fang, J, Fang, S S, Fang, X, Fang, Y, Fava, L, Fedorov, O, Feldbauer, F, Felici, G, Feng, C Q, Fioravanti, E, Fritsch, M, Fu, C D, Gao, Q, Gao, X L, Gao, X Y, Gao, Y, Gao, Z, Garzia, I, Goetzen, K, Gong, W X, Gradl, W, Greco, M, Gu, M H, Gu, Y T, Guan, Y H, Guo, A Q, Guo, L B, Guo, Y, Guo, Y P, Haddadi, Z, Hafner, A, Han, S, Hao, X Q, Harris, F A, He, K L, Held, T, Heng, Y K, Hou, Z L, Hu, C, Hu, H M, Hu, J F
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creator	Ablikim, M Achasov, M N Ai, X C Albayrak, O Albrecht, M Ambrose, D J Amoroso, A An, F F An, Q Bai, J Z Baldini Ferroli, R Ban, Y Bennett, D W Bennett, J V Bertani, M Bettoni, D Bian, J M Bianchi, F Boger, E Boyko, I Briere, R A Cai, H Cai, X Cakir, O Calcaterra, A Cao, G F Cetin, S A Chang, J F Chelkov, G Chen, G Chen, H S Chen, H Y Chen, J C Chen, M L Chen, S J Chen, X Chen, X R Chen, Y B Cheng, H P Chu, X K Cibinetto, G Dai, H L Dai, J P Dbeyssi, A Dedovich, D Deng, Z Y Denig, A Denysenko, I Destefanis, M De Mori, F Ding, Y Dong, C Dong, J Dong, L Y Dong, M Y Dou, Z L Du, S X Duan, P F Fan, J Z Fang, J Fang, S S Fang, X Fang, Y Fava, L Fedorov, O Feldbauer, F Felici, G Feng, C Q Fioravanti, E Fritsch, M Fu, C D Gao, Q Gao, X L Gao, X Y Gao, Y Gao, Z Garzia, I Goetzen, K Gong, W X Gradl, W Greco, M Gu, M H Gu, Y T Guan, Y H Guo, A Q Guo, L B Guo, Y Guo, Y P Haddadi, Z Hafner, A Han, S Hao, X Q Harris, F A He, K L Held, T Heng, Y K Hou, Z L Hu, C Hu, H M Hu, J F
description	We report the first measurement of the absolute branching fraction for Λ_{c}^{+}→Λe^{+}ν_{e}. This measurement is based on 567 pb^{-1} of e^{+}e^{-} annihilation data produced at sqrt[s]=4.599 GeV, which is just above the Λ_{c}^{+}Λ[over ¯]_{c}^{-} threshold. The data were collected with the BESIII detector at the BEPCII storage rings. The branching fraction is determined to be B(Λ_{c}^{+}→Λe^{+}ν_{e})=[3.63±0.38(stat)±0.20(syst)]%, representing a significant improvement in precision over the current indirect determination. As the branching fraction for Λ_{c}^{+}→Λe^{+}ν_{e} is the benchmark for those of other Λ_{c}^{+} semileptonic channels, our result provides a unique test of different theoretical models, which is the most stringent to date.
doi_str_mv	10.1103/PhysRevLett.115.221805
format	Article
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This measurement is based on 567 pb^{-1} of e^{+}e^{-} annihilation data produced at sqrt[s]=4.599 GeV, which is just above the Λ_{c}^{+}Λ[over ¯]_{c}^{-} threshold. The data were collected with the BESIII detector at the BEPCII storage rings. The branching fraction is determined to be B(Λ_{c}^{+}→Λe^{+}ν_{e})=[3.63±0.38(stat)±0.20(syst)]%, representing a significant improvement in precision over the current indirect determination. As the branching fraction for Λ_{c}^{+}→Λe^{+}ν_{e} is the benchmark for those of other Λ_{c}^{+} semileptonic channels, our result provides a unique test of different theoretical models, which is the most stringent to date.</description><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.115.221805</identifier><identifier>PMID: 26650293</identifier><language>eng</language><publisher>United States</publisher><ispartof>Physical review letters, 2015-11, Vol.115 (22), p.221805-221805</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26650293$$D View this record in 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D</creatorcontrib><creatorcontrib>Deng, Z Y</creatorcontrib><creatorcontrib>Denig, A</creatorcontrib><creatorcontrib>Denysenko, I</creatorcontrib><creatorcontrib>Destefanis, M</creatorcontrib><creatorcontrib>De Mori, F</creatorcontrib><creatorcontrib>Ding, Y</creatorcontrib><creatorcontrib>Dong, C</creatorcontrib><creatorcontrib>Dong, J</creatorcontrib><creatorcontrib>Dong, L Y</creatorcontrib><creatorcontrib>Dong, M Y</creatorcontrib><creatorcontrib>Dou, Z L</creatorcontrib><creatorcontrib>Du, S X</creatorcontrib><creatorcontrib>Duan, P F</creatorcontrib><creatorcontrib>Fan, J Z</creatorcontrib><creatorcontrib>Fang, J</creatorcontrib><creatorcontrib>Fang, S S</creatorcontrib><creatorcontrib>Fang, X</creatorcontrib><creatorcontrib>Fang, Y</creatorcontrib><creatorcontrib>Fava, L</creatorcontrib><creatorcontrib>Fedorov, O</creatorcontrib><creatorcontrib>Feldbauer, F</creatorcontrib><creatorcontrib>Felici, G</creatorcontrib><creatorcontrib>Feng, C Q</creatorcontrib><creatorcontrib>Fioravanti, E</creatorcontrib><creatorcontrib>Fritsch, M</creatorcontrib><creatorcontrib>Fu, C D</creatorcontrib><creatorcontrib>Gao, Q</creatorcontrib><creatorcontrib>Gao, X L</creatorcontrib><creatorcontrib>Gao, X Y</creatorcontrib><creatorcontrib>Gao, Y</creatorcontrib><creatorcontrib>Gao, Z</creatorcontrib><creatorcontrib>Garzia, I</creatorcontrib><creatorcontrib>Goetzen, K</creatorcontrib><creatorcontrib>Gong, W X</creatorcontrib><creatorcontrib>Gradl, W</creatorcontrib><creatorcontrib>Greco, M</creatorcontrib><creatorcontrib>Gu, M H</creatorcontrib><creatorcontrib>Gu, Y T</creatorcontrib><creatorcontrib>Guan, Y H</creatorcontrib><creatorcontrib>Guo, A Q</creatorcontrib><creatorcontrib>Guo, L B</creatorcontrib><creatorcontrib>Guo, Y</creatorcontrib><creatorcontrib>Guo, Y P</creatorcontrib><creatorcontrib>Haddadi, Z</creatorcontrib><creatorcontrib>Hafner, A</creatorcontrib><creatorcontrib>Han, S</creatorcontrib><creatorcontrib>Hao, X 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This measurement is based on 567 pb^{-1} of e^{+}e^{-} annihilation data produced at sqrt[s]=4.599 GeV, which is just above the Λ_{c}^{+}Λ[over ¯]_{c}^{-} threshold. The data were collected with the BESIII detector at the BEPCII storage rings. The branching fraction is determined to be B(Λ_{c}^{+}→Λe^{+}ν_{e})=[3.63±0.38(stat)±0.20(syst)]%, representing a significant improvement in precision over the current indirect determination. As the branching fraction for Λ_{c}^{+}→Λe^{+}ν_{e} is the benchmark for those of other Λ_{c}^{+} semileptonic channels, our result provides a unique test of different theoretical models, which is the most stringent to date.</description><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNo1kE1KAzEcxYMgtlavULIUZGqSSTKTZS1WhRZFdOuQSf-xI_NRk4xQSrcewG3P4hV6CE9ixbp6j8ePB-8h1KdkQCmJL-7nS_8A7xMIYReIAWM0JeIAdSlJVJRQyjvo2PtXQghlMj1CHSalIEzFXTSdgvatgwrqgBuLwxzwMPdN2QbAl07XZl7UL3jstAlFU2PbOLzdZCuzfl6dr78_Prcb-HXbr2wF6xN0aHXp4XSvPfQ0vnoc3USTu-vb0XASLSinIRIy1yCBKK4UFcyCBS6BK82ltARmM1BCqzxRuWEmTrnRieaKWmNknArJ4h46--tduOatBR-yqvAGylLX0LQ-o-luIWdUJDu0v0fbvIJZtnBFpd0y-78g_gHSw2KQ</recordid><startdate>20151127</startdate><enddate>20151127</enddate><creator>Ablikim, M</creator><creator>Achasov, M N</creator><creator>Ai, X C</creator><creator>Albayrak, O</creator><creator>Albrecht, 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C ; Hu, H M ; Hu, J F</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p141t-56bae6e09499152fefe46e49a466f0edde95a9b79bc2c384ca7a491fcc6385623</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ablikim, M</creatorcontrib><creatorcontrib>Achasov, M N</creatorcontrib><creatorcontrib>Ai, X C</creatorcontrib><creatorcontrib>Albayrak, O</creatorcontrib><creatorcontrib>Albrecht, M</creatorcontrib><creatorcontrib>Ambrose, D J</creatorcontrib><creatorcontrib>Amoroso, A</creatorcontrib><creatorcontrib>An, F F</creatorcontrib><creatorcontrib>An, Q</creatorcontrib><creatorcontrib>Bai, J Z</creatorcontrib><creatorcontrib>Baldini Ferroli, R</creatorcontrib><creatorcontrib>Ban, Y</creatorcontrib><creatorcontrib>Bennett, D W</creatorcontrib><creatorcontrib>Bennett, J V</creatorcontrib><creatorcontrib>Bertani, M</creatorcontrib><creatorcontrib>Bettoni, D</creatorcontrib><creatorcontrib>Bian, J M</creatorcontrib><creatorcontrib>Bianchi, F</creatorcontrib><creatorcontrib>Boger, E</creatorcontrib><creatorcontrib>Boyko, I</creatorcontrib><creatorcontrib>Briere, R A</creatorcontrib><creatorcontrib>Cai, H</creatorcontrib><creatorcontrib>Cai, X</creatorcontrib><creatorcontrib>Cakir, O</creatorcontrib><creatorcontrib>Calcaterra, A</creatorcontrib><creatorcontrib>Cao, G F</creatorcontrib><creatorcontrib>Cetin, S A</creatorcontrib><creatorcontrib>Chang, J F</creatorcontrib><creatorcontrib>Chelkov, G</creatorcontrib><creatorcontrib>Chen, G</creatorcontrib><creatorcontrib>Chen, H S</creatorcontrib><creatorcontrib>Chen, H Y</creatorcontrib><creatorcontrib>Chen, J C</creatorcontrib><creatorcontrib>Chen, M L</creatorcontrib><creatorcontrib>Chen, S J</creatorcontrib><creatorcontrib>Chen, X</creatorcontrib><creatorcontrib>Chen, X R</creatorcontrib><creatorcontrib>Chen, Y B</creatorcontrib><creatorcontrib>Cheng, H P</creatorcontrib><creatorcontrib>Chu, X K</creatorcontrib><creatorcontrib>Cibinetto, G</creatorcontrib><creatorcontrib>Dai, H L</creatorcontrib><creatorcontrib>Dai, J P</creatorcontrib><creatorcontrib>Dbeyssi, A</creatorcontrib><creatorcontrib>Dedovich, D</creatorcontrib><creatorcontrib>Deng, Z Y</creatorcontrib><creatorcontrib>Denig, A</creatorcontrib><creatorcontrib>Denysenko, I</creatorcontrib><creatorcontrib>Destefanis, M</creatorcontrib><creatorcontrib>De Mori, F</creatorcontrib><creatorcontrib>Ding, Y</creatorcontrib><creatorcontrib>Dong, C</creatorcontrib><creatorcontrib>Dong, J</creatorcontrib><creatorcontrib>Dong, L Y</creatorcontrib><creatorcontrib>Dong, M Y</creatorcontrib><creatorcontrib>Dou, Z L</creatorcontrib><creatorcontrib>Du, S X</creatorcontrib><creatorcontrib>Duan, P F</creatorcontrib><creatorcontrib>Fan, J Z</creatorcontrib><creatorcontrib>Fang, J</creatorcontrib><creatorcontrib>Fang, S S</creatorcontrib><creatorcontrib>Fang, X</creatorcontrib><creatorcontrib>Fang, Y</creatorcontrib><creatorcontrib>Fava, L</creatorcontrib><creatorcontrib>Fedorov, O</creatorcontrib><creatorcontrib>Feldbauer, F</creatorcontrib><creatorcontrib>Felici, G</creatorcontrib><creatorcontrib>Feng, C Q</creatorcontrib><creatorcontrib>Fioravanti, E</creatorcontrib><creatorcontrib>Fritsch, M</creatorcontrib><creatorcontrib>Fu, C D</creatorcontrib><creatorcontrib>Gao, Q</creatorcontrib><creatorcontrib>Gao, X L</creatorcontrib><creatorcontrib>Gao, X Y</creatorcontrib><creatorcontrib>Gao, Y</creatorcontrib><creatorcontrib>Gao, Z</creatorcontrib><creatorcontrib>Garzia, I</creatorcontrib><creatorcontrib>Goetzen, K</creatorcontrib><creatorcontrib>Gong, W X</creatorcontrib><creatorcontrib>Gradl, W</creatorcontrib><creatorcontrib>Greco, M</creatorcontrib><creatorcontrib>Gu, M H</creatorcontrib><creatorcontrib>Gu, Y T</creatorcontrib><creatorcontrib>Guan, Y H</creatorcontrib><creatorcontrib>Guo, A Q</creatorcontrib><creatorcontrib>Guo, L B</creatorcontrib><creatorcontrib>Guo, Y</creatorcontrib><creatorcontrib>Guo, Y P</creatorcontrib><creatorcontrib>Haddadi, Z</creatorcontrib><creatorcontrib>Hafner, A</creatorcontrib><creatorcontrib>Han, S</creatorcontrib><creatorcontrib>Hao, X Q</creatorcontrib><creatorcontrib>Harris, F A</creatorcontrib><creatorcontrib>He, K L</creatorcontrib><creatorcontrib>Held, T</creatorcontrib><creatorcontrib>Heng, Y K</creatorcontrib><creatorcontrib>Hou, Z L</creatorcontrib><creatorcontrib>Hu, C</creatorcontrib><creatorcontrib>Hu, H M</creatorcontrib><creatorcontrib>Hu, J F</creatorcontrib><creatorcontrib>BESIII Collaboration</creatorcontrib><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ablikim, M</au><au>Achasov, M N</au><au>Ai, X C</au><au>Albayrak, O</au><au>Albrecht, M</au><au>Ambrose, D J</au><au>Amoroso, A</au><au>An, F F</au><au>An, Q</au><au>Bai, J Z</au><au>Baldini Ferroli, R</au><au>Ban, Y</au><au>Bennett, D W</au><au>Bennett, J V</au><au>Bertani, M</au><au>Bettoni, D</au><au>Bian, J M</au><au>Bianchi, F</au><au>Boger, E</au><au>Boyko, I</au><au>Briere, R A</au><au>Cai, H</au><au>Cai, X</au><au>Cakir, O</au><au>Calcaterra, A</au><au>Cao, G F</au><au>Cetin, S A</au><au>Chang, J F</au><au>Chelkov, G</au><au>Chen, G</au><au>Chen, H S</au><au>Chen, H Y</au><au>Chen, J C</au><au>Chen, M L</au><au>Chen, S J</au><au>Chen, X</au><au>Chen, X R</au><au>Chen, Y B</au><au>Cheng, H P</au><au>Chu, X K</au><au>Cibinetto, G</au><au>Dai, H L</au><au>Dai, J P</au><au>Dbeyssi, A</au><au>Dedovich, D</au><au>Deng, Z Y</au><au>Denig, A</au><au>Denysenko, I</au><au>Destefanis, M</au><au>De Mori, F</au><au>Ding, Y</au><au>Dong, C</au><au>Dong, J</au><au>Dong, L Y</au><au>Dong, M Y</au><au>Dou, Z L</au><au>Du, S X</au><au>Duan, P F</au><au>Fan, J Z</au><au>Fang, J</au><au>Fang, S S</au><au>Fang, X</au><au>Fang, Y</au><au>Fava, L</au><au>Fedorov, O</au><au>Feldbauer, F</au><au>Felici, G</au><au>Feng, C Q</au><au>Fioravanti, E</au><au>Fritsch, M</au><au>Fu, C D</au><au>Gao, Q</au><au>Gao, X L</au><au>Gao, X Y</au><au>Gao, Y</au><au>Gao, Z</au><au>Garzia, I</au><au>Goetzen, K</au><au>Gong, W X</au><au>Gradl, W</au><au>Greco, M</au><au>Gu, M H</au><au>Gu, Y T</au><au>Guan, Y H</au><au>Guo, A Q</au><au>Guo, L B</au><au>Guo, Y</au><au>Guo, Y P</au><au>Haddadi, Z</au><au>Hafner, A</au><au>Han, S</au><au>Hao, X Q</au><au>Harris, F A</au><au>He, K L</au><au>Held, T</au><au>Heng, Y K</au><au>Hou, Z L</au><au>Hu, C</au><au>Hu, H M</au><au>Hu, J F</au><aucorp>BESIII Collaboration</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Measurement of the Absolute Branching Fraction for Λ_{c}^{+}→Λe^{+}ν_{e}</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2015-11-27</date><risdate>2015</risdate><volume>115</volume><issue>22</issue><spage>221805</spage><epage>221805</epage><pages>221805-221805</pages><eissn>1079-7114</eissn><abstract>We report the first measurement of the absolute branching fraction for Λ_{c}^{+}→Λe^{+}ν_{e}. This measurement is based on 567 pb^{-1} of e^{+}e^{-} annihilation data produced at sqrt[s]=4.599 GeV, which is just above the Λ_{c}^{+}Λ[over ¯]_{c}^{-} threshold. The data were collected with the BESIII detector at the BEPCII storage rings. The branching fraction is determined to be B(Λ_{c}^{+}→Λe^{+}ν_{e})=[3.63±0.38(stat)±0.20(syst)]%, representing a significant improvement in precision over the current indirect determination. As the branching fraction for Λ_{c}^{+}→Λe^{+}ν_{e} is the benchmark for those of other Λ_{c}^{+} semileptonic channels, our result provides a unique test of different theoretical models, which is the most stringent to date.</abstract><cop>United States</cop><pmid>26650293</pmid><doi>10.1103/PhysRevLett.115.221805</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record>
fulltext	fulltext
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language	eng
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source	American Physical Society Journals
title	Measurement of the Absolute Branching Fraction for Λ_{c}^{+}→Λe^{+}ν_{e}
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