Measurement of Singly Cabibbo Suppressed Decays Λc+ →pπ+π- and Λc+ →pK+K-

M. Ablikim; M. N. Achasov; S. Ahmed; X. C. Ai; O. Albayrak; M. Albrecht; D. J. Ambrose; A. Amoroso; F. F. An; Q. An; J. Z. Bai; O. Bakina; R. Baldini Ferroli; Y. Ban; D. W. Bennett; J. V. Bennett; N. Berger; M. Bertani; D. Bettoni; J. M. Bian; F. Bianchi; E. Boger; I. Boyko; R. A. Briere; H. Cai; X. Cai; O. Cakir; A. Calcaterra; G. F. Cao; S. A. Cetin; J. Chai; J. F. Chang; G. Chelkov; G. Chen; H. S. Chen; J. C. Chen; M. L. Chen; S. Chen; S. J. Chen; X. Chen; X. R. Chen; Y. B. Chen; H. P. Cheng; X. K. Chu; G. Cibinetto; H. L. Dai; J. P. Dai; A. Dbeyssi; H. Muramatsu; R. Poling; (BESIII Collaboration)

doi:10.1103/PhysRevLett.117.232002

Measurement of Singly Cabibbo Suppressed Decays Λc+ →pπ+π- and Λc+ →pK+K-

M. Ablikim, M. N. Achasov, S. Ahmed, X. C. Ai, O. Albayrak, M. Albrecht, D. J. Ambrose, A. Amoroso, F. F. An, Q. An, J. Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D. W. Bennett, J. V. Bennett, N. Berger, M. Bertani, D. Bettoni, J. M. BianF. Bianchi, E. Boger, I. Boyko, R. A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G. F. Cao, S. A. Cetin, J. Chai, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. Chen, S. J. Chen, X. Chen, X. R. Chen, Y. B. Chen, H. P. Cheng, X. K. Chu, G. Cibinetto, H. L. Dai, J. P. Dai, A. Dbeyssi, H. Muramatsu, R. Poling, (BESIII Collaboration)

Physics and Astronomy (Twin Cities)

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Abstract

Using 567 pb-1 of data collected with the BESIII detector at a center-of-mass energy of s=4.599 GeV, near the Λc+Λc- threshold, we study the singly Cabibbo-suppressed decays Λc+→pπ+π- and Λc+→pK+K-. By normalizing with respect to the Cabibbo-favored decay Λc+→pK-π+, we obtain ratios of branching fractions: [B(Λc+→pπ+π-)/B(Λc+→pK-π+)]=(6.70±0.48±0.25)%, [B(Λc+→pφ)/B(Λc+→pK-π+)]=(1.81±0.33±0.13)%, and [B(Λc+→pK+Knon-φ-)/B(Λc+→pK-π+)]=(9.36±2.22±0.71)×10-3, where the uncertainties are statistical and systematic, respectively. The absolute branching fractions are also presented. Among these measurements, the decay Λc+→pπ+π- is observed for the first time, and the precision of the branching fraction for Λc+→pK+Knon-φ- and Λc+→pφ is significantly improved.

Original language	English (US)
Article number	232002
Journal	Physical review letters
Volume	117
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.117.232002
State	Published - Dec 2 2016

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© 2016 American Physical Society.

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Ablikim, M., Achasov, M. N., Ahmed, S., Ai, X. C., Albayrak, O., Albrecht, M., Ambrose, D. J., Amoroso, A., An, F. F., An, Q., Bai, J. Z., Bakina, O., Baldini Ferroli, R., Ban, Y., Bennett, D. W., Bennett, J. V., Berger, N., Bertani, M., Bettoni, D., ... (BESIII Collaboration) (2016). Measurement of Singly Cabibbo Suppressed Decays Λc+ →pπ+π- and Λc+ →pK+K-. Physical review letters, 117(23), Article 232002. https://doi.org/10.1103/PhysRevLett.117.232002

Ablikim, M, Achasov, MN, Ahmed, S, Ai, XC, Albayrak, O, Albrecht, M, Ambrose, DJ, Amoroso, A, An, FF, An, Q, Bai, JZ, Bakina, O, Baldini Ferroli, R, Ban, Y, Bennett, DW, Bennett, JV, Berger, N, Bertani, M, Bettoni, D, Bian, JM, Bianchi, F, Boger, E, Boyko, I, Briere, RA, Cai, H, Cai, X, Cakir, O, Calcaterra, A, Cao, GF, Cetin, SA, Chai, J, Chang, JF, Chelkov, G, Chen, G, Chen, HS, Chen, JC, Chen, ML, Chen, S, Chen, SJ, Chen, X, Chen, XR, Chen, YB, Cheng, HP, Chu, XK, Cibinetto, G, Dai, HL, Dai, JP, Dbeyssi, A, Muramatsu, H, Poling, R & (BESIII Collaboration) 2016, 'Measurement of Singly Cabibbo Suppressed Decays Λc+ →pπ+π- and Λc+ →pK+K-', Physical review letters, vol. 117, no. 23, 232002. https://doi.org/10.1103/PhysRevLett.117.232002

@article{f145e5837d49415eaefb381905b58ae7,

title = "Measurement of Singly Cabibbo Suppressed Decays Λc+ →pπ+π- and Λc+ →pK+K-",

abstract = "Using 567 pb-1 of data collected with the BESIII detector at a center-of-mass energy of s=4.599 GeV, near the Λc+Λc- threshold, we study the singly Cabibbo-suppressed decays Λc+→pπ+π- and Λc+→pK+K-. By normalizing with respect to the Cabibbo-favored decay Λc+→pK-π+, we obtain ratios of branching fractions: [B(Λc+→pπ+π-)/B(Λc+→pK-π+)]=(6.70±0.48±0.25)%, [B(Λc+→pφ)/B(Λc+→pK-π+)]=(1.81±0.33±0.13)%, and [B(Λc+→pK+Knon-φ-)/B(Λc+→pK-π+)]=(9.36±2.22±0.71)×10-3, where the uncertainties are statistical and systematic, respectively. The absolute branching fractions are also presented. Among these measurements, the decay Λc+→pπ+π- is observed for the first time, and the precision of the branching fraction for Λc+→pK+Knon-φ- and Λc+→pφ is significantly improved.",

author = "M. Ablikim and Achasov, {M. N.} and S. Ahmed and Ai, {X. C.} and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and A. Amoroso and An, {F. F.} and Q. An and Bai, {J. Z.} and O. Bakina and {Baldini Ferroli}, R. and Y. Ban and Bennett, {D. W.} and Bennett, {J. V.} and N. Berger and M. Bertani and D. Bettoni and Bian, {J. M.} and F. Bianchi and E. Boger and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and J. Chai and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and S. Chen and Chen, {S. J.} and X. Chen and Chen, {X. R.} and Chen, {Y. B.} and Cheng, {H. P.} and Chu, {X. K.} and G. Cibinetto and Dai, {H. L.} and Dai, {J. P.} and A. Dbeyssi and H. Muramatsu and R. Poling and {(BESIII Collaboration)}",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = dec,

day = "2",

doi = "10.1103/PhysRevLett.117.232002",

language = "English (US)",

volume = "117",

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T1 - Measurement of Singly Cabibbo Suppressed Decays Λc+ →pπ+π- and Λc+ →pK+K-

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bian, J. M.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chai, J.

AU - Chang, J. F.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, S.

AU - Chen, S. J.

AU - Chen, X.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Cheng, H. P.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Muramatsu, H.

AU - Poling, R.

AU - (BESIII Collaboration)

PY - 2016/12/2

Y1 - 2016/12/2

N2 - Using 567 pb-1 of data collected with the BESIII detector at a center-of-mass energy of s=4.599 GeV, near the Λc+Λc- threshold, we study the singly Cabibbo-suppressed decays Λc+→pπ+π- and Λc+→pK+K-. By normalizing with respect to the Cabibbo-favored decay Λc+→pK-π+, we obtain ratios of branching fractions: [B(Λc+→pπ+π-)/B(Λc+→pK-π+)]=(6.70±0.48±0.25)%, [B(Λc+→pφ)/B(Λc+→pK-π+)]=(1.81±0.33±0.13)%, and [B(Λc+→pK+Knon-φ-)/B(Λc+→pK-π+)]=(9.36±2.22±0.71)×10-3, where the uncertainties are statistical and systematic, respectively. The absolute branching fractions are also presented. Among these measurements, the decay Λc+→pπ+π- is observed for the first time, and the precision of the branching fraction for Λc+→pK+Knon-φ- and Λc+→pφ is significantly improved.

AB - Using 567 pb-1 of data collected with the BESIII detector at a center-of-mass energy of s=4.599 GeV, near the Λc+Λc- threshold, we study the singly Cabibbo-suppressed decays Λc+→pπ+π- and Λc+→pK+K-. By normalizing with respect to the Cabibbo-favored decay Λc+→pK-π+, we obtain ratios of branching fractions: [B(Λc+→pπ+π-)/B(Λc+→pK-π+)]=(6.70±0.48±0.25)%, [B(Λc+→pφ)/B(Λc+→pK-π+)]=(1.81±0.33±0.13)%, and [B(Λc+→pK+Knon-φ-)/B(Λc+→pK-π+)]=(9.36±2.22±0.71)×10-3, where the uncertainties are statistical and systematic, respectively. The absolute branching fractions are also presented. Among these measurements, the decay Λc+→pπ+π- is observed for the first time, and the precision of the branching fraction for Λc+→pK+Knon-φ- and Λc+→pφ is significantly improved.

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U2 - 10.1103/PhysRevLett.117.232002

DO - 10.1103/PhysRevLett.117.232002

M3 - Article

C2 - 27982610

AN - SCOPUS:85002158060

SN - 0031-9007

VL - 117

JO - Physical review letters

JF - Physical review letters

IS - 23

M1 - 232002

ER -

Measurement of Singly Cabibbo Suppressed Decays Λc+ →pπ+π- and Λc+ →pK+K-

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