Using data corresponding to an integrated luminosity of 651 pb−1 accumulated at 22 center-of-mass energies from 2.00 to 3.08 GeV by the BESIII experiment, the process e+e− → φπ+π− is studied. The cross sections for e+e− → φπ+π− are consistent with previous results, but with improved precision. To measure the mass and width of the structure observed in the cross section line shape, a combine fit is performed after enhancing the contribution from φf0(980). The fit reveals a structure with the mass of M = 2178 pm 20 pm 5 MeV/c2 and the width of Γ = 140 pm 36 pm 16 MeV, where the first uncertainties are statistical and the second ones are systematic.

Measurement of e+e−→ϕπ+π− cross sections at center-of-mass energies from 2.00 to 3.08 GeV

Garzia, I.;Gramigna, S.;
2023

Abstract

Using data corresponding to an integrated luminosity of 651 pb−1 accumulated at 22 center-of-mass energies from 2.00 to 3.08 GeV by the BESIII experiment, the process e+e− → φπ+π− is studied. The cross sections for e+e− → φπ+π− are consistent with previous results, but with improved precision. To measure the mass and width of the structure observed in the cross section line shape, a combine fit is performed after enhancing the contribution from φf0(980). The fit reveals a structure with the mass of M = 2178 pm 20 pm 5 MeV/c2 and the width of Γ = 140 pm 36 pm 16 MeV, where the first uncertainties are statistical and the second ones are systematic.
2023
Ablikim, M.; Achasov, M.  N.; Adlarson, P.; Aliberti, R.; Amoroso, A.; An, M.  R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Batozskaya, V....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2530505
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