First Measurement of the Form Factors in Ds+ →k0e+νe and Ds+ →k∗0e+νe Decays

BESIII Collaboration

doi:10.1103/PhysRevLett.122.061801

First Measurement of the Form Factors in Ds+ →k0e+νe and Ds+ →k∗0e+νe Decays

BESIII Collaboration

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

We report on new measurements of Cabibbo-suppressed semileptonic Ds+ decays using 3.19 fb-1 of e+e-annihilation data sample collected at a center-of-mass energy of 4.178 GeV with the BESIII detector at the BEPCII collider. Our results include branching fractions B(Ds+→K0e+νe)=[3.25±0.38(stat)±0.16(syst)]×10-3 and B(Ds+→K∗0e+νe)=[2.37±0.26(stat)±0.20(syst)]×10-3, which are much improved relative to previous measurements, and the first measurements of the hadronic form-factor parameters for these decays. For Ds+→K0e+νe, we obtain f+(0)=0.720±0.084(stat)±0.013(syst), and for Ds+→K∗0e+νe, we find form-factor ratios rV=V(0)/A1(0)=1.67±0.34(stat)±0.16(syst) and r2=A2(0)/A1(0)=0.77±0.28(stat)±0.07(syst).

Lingua originale	Inglese
Numero di articolo	061801
Rivista	Physical Review Letters
Volume	122
Numero di pubblicazione	6
DOI	https://doi.org/10.1103/PhysRevLett.122.061801
Stato di pubblicazione	Pubblicato - 15 feb 2019
Pubblicato esternamente	Sì

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10.1103/PhysRevLett.122.061801

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@article{ee3570f4b0b84b94b64d010dae05ed3b,

title = "First Measurement of the Form Factors in Ds+ →k0e+νe and Ds+ →k∗0e+νe Decays",

abstract = "We report on new measurements of Cabibbo-suppressed semileptonic Ds+ decays using 3.19 fb-1 of e+e-annihilation data sample collected at a center-of-mass energy of 4.178 GeV with the BESIII detector at the BEPCII collider. Our results include branching fractions B(Ds+→K0e+νe)=[3.25±0.38(stat)±0.16(syst)]{\texttimes}10-3 and B(Ds+→K∗0e+νe)=[2.37±0.26(stat)±0.20(syst)]{\texttimes}10-3, which are much improved relative to previous measurements, and the first measurements of the hadronic form-factor parameters for these decays. For Ds+→K0e+νe, we obtain f+(0)=0.720±0.084(stat)±0.013(syst), and for Ds+→K∗0e+νe, we find form-factor ratios rV=V(0)/A1(0)=1.67±0.34(stat)±0.16(syst) and r2=A2(0)/A1(0)=0.77±0.28(stat)±0.07(syst).",

author = "\{BESIII Collaboration\} and M. Ablikim and Achasov, \{M. N.\} and S. Ahmed and M. Albrecht and M. Alekseev and A. Amoroso and An, \{F. F.\} and Q. An and Y. Bai and O. Bakina and \{Baldini Ferroli\}, R. and Y. Ban and K. Begzsuren and Bennett, \{D. W.\} and Bennett, \{J. V.\} and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and E. Boger and I. Boyko and Briere, \{R. A.\} and H. Cai and X. Cai and A. Calcaterra and Cao, \{G. F.\} and Cetin, \{S. A.\} and J. Chai and Chang, \{J. F.\} and Chang, \{W. L.\} and G. Chelkov and G. Chen and Chen, \{H. S.\} and Chen, \{J. C.\} and Chen, \{M. L.\} and Chen, \{P. L.\} and Chen, \{S. J.\} and Chen, \{X. R.\} and Chen, \{Y. B.\} and W. Cheng and Chu, \{X. K.\} and G. Cibinetto and F. Cossio and Dai, \{H. L.\} and Dai, \{J. P.\} and A. Dbeyssi and D. Dedovich and Deng, \{Z. Y.\} and A. Denig and I. Denysenko",

note = "Publisher Copyright: {\textcopyright} 2019 authors.",

year = "2019",

month = feb,

day = "15",

doi = "10.1103/PhysRevLett.122.061801",

language = "English",

volume = "122",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "6",

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TY - JOUR

T1 - First Measurement of the Form Factors in Ds+ →k0e+νe and Ds+ →k∗0e+νe Decays

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Alekseev, M.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, Y.

AU - Bakina, O.

AU - Baldini Ferroli, R.

AU - Ban, Y.

AU - Begzsuren, K.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chai, J.

AU - Chang, J. F.

AU - Chang, W. L.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, P. L.

AU - Chen, S. J.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Cheng, W.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Cossio, F.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

AU - Denysenko, I.

PY - 2019/2/15

Y1 - 2019/2/15

N2 - We report on new measurements of Cabibbo-suppressed semileptonic Ds+ decays using 3.19 fb-1 of e+e-annihilation data sample collected at a center-of-mass energy of 4.178 GeV with the BESIII detector at the BEPCII collider. Our results include branching fractions B(Ds+→K0e+νe)=[3.25±0.38(stat)±0.16(syst)]×10-3 and B(Ds+→K∗0e+νe)=[2.37±0.26(stat)±0.20(syst)]×10-3, which are much improved relative to previous measurements, and the first measurements of the hadronic form-factor parameters for these decays. For Ds+→K0e+νe, we obtain f+(0)=0.720±0.084(stat)±0.013(syst), and for Ds+→K∗0e+νe, we find form-factor ratios rV=V(0)/A1(0)=1.67±0.34(stat)±0.16(syst) and r2=A2(0)/A1(0)=0.77±0.28(stat)±0.07(syst).

AB - We report on new measurements of Cabibbo-suppressed semileptonic Ds+ decays using 3.19 fb-1 of e+e-annihilation data sample collected at a center-of-mass energy of 4.178 GeV with the BESIII detector at the BEPCII collider. Our results include branching fractions B(Ds+→K0e+νe)=[3.25±0.38(stat)±0.16(syst)]×10-3 and B(Ds+→K∗0e+νe)=[2.37±0.26(stat)±0.20(syst)]×10-3, which are much improved relative to previous measurements, and the first measurements of the hadronic form-factor parameters for these decays. For Ds+→K0e+νe, we obtain f+(0)=0.720±0.084(stat)±0.013(syst), and for Ds+→K∗0e+νe, we find form-factor ratios rV=V(0)/A1(0)=1.67±0.34(stat)±0.16(syst) and r2=A2(0)/A1(0)=0.77±0.28(stat)±0.07(syst).

UR - https://www.scopus.com/pages/publications/85061552964

U2 - 10.1103/PhysRevLett.122.061801

DO - 10.1103/PhysRevLett.122.061801

M3 - Article

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 061801

ER -

First Measurement of the Form Factors in Ds+ →k0e+νe and Ds+ →k∗0e+νe Decays

Abstract

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