First measurements of the absolute branching fraction of Λc(2625)+→Λc+π+π− and upper limit on Λc(2595)+→Λc+π+π−

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First measurements of the absolute branching fraction of Λc(2625)+→Λc+π+π− and upper limit on Λc(2595)+→Λc+π+π−. / The BESIII Collaboration ; Николаев, Иван Борисович ; Мучной, Николай Юрьевич.

в: Physical Review D, Том 109, № 11, 112007, 05.06.2024.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{8b285c4d4a08428b869a766185313001,

title = "First measurements of the absolute branching fraction of Λc(2625)+→Λc+π+π− and upper limit on Λc(2595)+→Λc+π+π−",

abstract = "The absolute branching fraction of the decay Λc(2625)+→Λc+π+π- is measured for the first time to be (50.2±5.7stat±3.5syst)% with 368.48 pb-1 of e+e- collision data collected by the BESIII detector at the center-of-mass energies of s=4.918 and 4.950 GeV. Although the central value of the result is lower than the theoretical prediction of 67%, obtained from isospin symmetry, they are consistent taking the uncertainties into account. This is the first absolute branching fraction measurement for Λc(2625)+ since it was found. This measurement is necessary to obtain the coupling constants for the transitions between s-wave and p-wave charmed baryons in heavy hadron chiral perturbation theory. In addition, we search for the decay Λc(2595)+→Λc+π+π-. No significant signal is observed, and the upper limit on its branching fraction is determined to be 85.0% at the 90% confidence level. ",

author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Николаев, {Иван Борисович} and Мучной, {Николай Юрьевич}",

year = "2024",

month = jun,

day = "5",

doi = "10.1103/PhysRevD.109.112007",

language = "English",

volume = "109",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "11",

}

RIS

TY - JOUR

T1 - First measurements of the absolute branching fraction of Λc(2625)+→Λc+π+π− and upper limit on Λc(2595)+→Λc+π+π−

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

PY - 2024/6/5

Y1 - 2024/6/5

N2 - The absolute branching fraction of the decay Λc(2625)+→Λc+π+π- is measured for the first time to be (50.2±5.7stat±3.5syst)% with 368.48 pb-1 of e+e- collision data collected by the BESIII detector at the center-of-mass energies of s=4.918 and 4.950 GeV. Although the central value of the result is lower than the theoretical prediction of 67%, obtained from isospin symmetry, they are consistent taking the uncertainties into account. This is the first absolute branching fraction measurement for Λc(2625)+ since it was found. This measurement is necessary to obtain the coupling constants for the transitions between s-wave and p-wave charmed baryons in heavy hadron chiral perturbation theory. In addition, we search for the decay Λc(2595)+→Λc+π+π-. No significant signal is observed, and the upper limit on its branching fraction is determined to be 85.0% at the 90% confidence level.

AB - The absolute branching fraction of the decay Λc(2625)+→Λc+π+π- is measured for the first time to be (50.2±5.7stat±3.5syst)% with 368.48 pb-1 of e+e- collision data collected by the BESIII detector at the center-of-mass energies of s=4.918 and 4.950 GeV. Although the central value of the result is lower than the theoretical prediction of 67%, obtained from isospin symmetry, they are consistent taking the uncertainties into account. This is the first absolute branching fraction measurement for Λc(2625)+ since it was found. This measurement is necessary to obtain the coupling constants for the transitions between s-wave and p-wave charmed baryons in heavy hadron chiral perturbation theory. In addition, we search for the decay Λc(2595)+→Λc+π+π-. No significant signal is observed, and the upper limit on its branching fraction is determined to be 85.0% at the 90% confidence level.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85196221751&origin=inward&txGid=511bc4fd23420b24fa9b4fe0e4af1820

U2 - 10.1103/PhysRevD.109.112007

DO - 10.1103/PhysRevD.109.112007

M3 - Article

VL - 109

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - 112007

ER -

ID: 62710381