First Experimental Study of the Purely Leptonic Decay Ds∗+ →e+νe

Sonia Kabana; Vindhyawasini Prasad; The BESIII collaboration

doi:10.1103/PHYSREVLETT.131.141802

First Experimental Study of the Purely Leptonic Decay Ds∗+ →e+νe

Translated title of the contribution: First Experimental Study of the Purely Leptonic Decay Ds∗+ →e+νe

Sonia Kabana
, Vindhyawasini Prasad
, The BESIII collaboration

Institute of Higher Research

Universidad de Tarapacá

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Using 7.33 fb-1 of e+e- collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay Ds∗+→e+νe. Our data contain a signal of this decay with a statistical significance of 2.9σ. The branching fraction of Ds∗+→e+νe is measured to be (2.1-0.9stat+1.2±0.2syst)×10-5, corresponding to an upper limit of 4.0×10-5 at the 90% confidence level. Taking the total width of the Ds∗+ [(0.070±0.028) keV] predicted with the radiative Ds∗+ decay from the lattice QCD calculation as input, the decay constant of the Ds∗+ is determined to be fDs∗+=(214-46stat+61±44syst) MeV, corresponding to an upper limit of 354 MeV at the 90% confidence level.

Translated title of the contribution	First Experimental Study of the Purely Leptonic Decay Ds∗+ →e+νe
Original language	English
Article number	141802
Pages (from-to)	1-9
Number of pages	9
Journal	Physical Review Letters
Volume	131
Issue number	14
DOIs	https://doi.org/10.1103/PHYSREVLETT.131.141802
State	Published - 6 Oct 2023

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title = "First Experimental Study of the Purely Leptonic Decay Ds∗+ →e+νe",

abstract = "Using 7.33 fb-1 of e+e- collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay Ds∗+→e+νe. Our data contain a signal of this decay with a statistical significance of 2.9σ. The branching fraction of Ds∗+→e+νe is measured to be (2.1-0.9stat+1.2±0.2syst)×10-5, corresponding to an upper limit of 4.0×10-5 at the 90\% confidence level. Taking the total width of the Ds∗+ [(0.070±0.028) keV] predicted with the radiative Ds∗+ decay from the lattice QCD calculation as input, the decay constant of the Ds∗+ is determined to be fDs∗+=(214-46stat+61±44syst) MeV, corresponding to an upper limit of 354 MeV at the 90\% confidence level.",

author = "Sonia Kabana and Vindhyawasini Prasad and \{The BESIII collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s).",

year = "2023",

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doi = "10.1103/PHYSREVLETT.131.141802",

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T1 - First Experimental Study of the Purely Leptonic Decay Ds∗+ →e+νe

AU - Kabana, Sonia

AU - Prasad, Vindhyawasini

AU - The BESIII collaboration

PY - 2023/10/6

Y1 - 2023/10/6

N2 - Using 7.33 fb-1 of e+e- collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay Ds∗+→e+νe. Our data contain a signal of this decay with a statistical significance of 2.9σ. The branching fraction of Ds∗+→e+νe is measured to be (2.1-0.9stat+1.2±0.2syst)×10-5, corresponding to an upper limit of 4.0×10-5 at the 90% confidence level. Taking the total width of the Ds∗+ [(0.070±0.028) keV] predicted with the radiative Ds∗+ decay from the lattice QCD calculation as input, the decay constant of the Ds∗+ is determined to be fDs∗+=(214-46stat+61±44syst) MeV, corresponding to an upper limit of 354 MeV at the 90% confidence level.

AB - Using 7.33 fb-1 of e+e- collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay Ds∗+→e+νe. Our data contain a signal of this decay with a statistical significance of 2.9σ. The branching fraction of Ds∗+→e+νe is measured to be (2.1-0.9stat+1.2±0.2syst)×10-5, corresponding to an upper limit of 4.0×10-5 at the 90% confidence level. Taking the total width of the Ds∗+ [(0.070±0.028) keV] predicted with the radiative Ds∗+ decay from the lattice QCD calculation as input, the decay constant of the Ds∗+ is determined to be fDs∗+=(214-46stat+61±44syst) MeV, corresponding to an upper limit of 354 MeV at the 90% confidence level.

UR - https://www.scopus.com/pages/publications/85175053964

UR - https://publons.com/wos-op/publon/64187293/

UR - https://pubmed.ncbi.nlm.nih.gov/37862669/

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DO - 10.1103/PHYSREVLETT.131.141802

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SN - 0031-9007

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EP - 9

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

M1 - 141802

ER -

First Experimental Study of the Purely Leptonic Decay Ds∗+ →e+νe

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