TY - JOUR

T1 - Cross section measurement of e+e−→ηψ(2S) and search for e+e−→ηX˜(3872)

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

PY - 2024/12/5

Y1 - 2024/12/5

N2 - The energy-dependent cross section for e+e-→ηψ(2S) is measured at 18 center of mass energies from 4.288 to 4.951 GeV using the BESIII detector. Using the same data samples, we also perform the first search for the reaction e+e-→ηX(3872), but no evidence is found for the X(3872) in the π+π-J/ψ mass distribution. At each of the 18 center of mass energies, upper limits at the 90% confidence level on the cross section for e+e-→ηψ(2S) and on the product of the e+e-→ηX(3872) cross section with the branching fraction of X(3872)→π+π-J/ψ are reported.

AB - The energy-dependent cross section for e+e-→ηψ(2S) is measured at 18 center of mass energies from 4.288 to 4.951 GeV using the BESIII detector. Using the same data samples, we also perform the first search for the reaction e+e-→ηX(3872), but no evidence is found for the X(3872) in the π+π-J/ψ mass distribution. At each of the 18 center of mass energies, upper limits at the 90% confidence level on the cross section for e+e-→ηψ(2S) and on the product of the e+e-→ηX(3872) cross section with the branching fraction of X(3872)→π+π-J/ψ are reported.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85195830525&origin=inward&txGid=79c10e693b9e38060c8226075078be38

U2 - 10.1103/PhysRevD.109.112004

DO - 10.1103/PhysRevD.109.112004

M3 - Article

VL - 109

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - 112004

ER -