Evidence for e+e- →γηc(1S) at center-of-mass energies between 4.01 and 4.60 GeV

M. Ablikim; M. N. Achasov; S. Ahmed; M. Albrecht; M. Alekseev; A. Amoroso; Z. Haddadi; N. Kalantar-Nayestanaki; M. Kavatsyuk; J. G. Messchendorp; M. Tiemens; BESIII Collaboration

doi:10.1103/PhysRevD.96.051101

Evidence for e⁺e^- →γη_c(1S) at center-of-mass energies between 4.01 and 4.60 GeV

M. Ablikim, M. N. Achasov, S. Ahmed, M. Albrecht, M. Alekseev, A. Amoroso, Z. Haddadi, N. Kalantar-Nayestanaki, M. Kavatsyuk, J. G. Messchendorp, M. Tiemens, BESIII Collaboration

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We present first evidence for the process e⁺e^- →γη_c(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve eta(c)(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section sigma(peak)(e(+)e(-) -> gamma eta(c)(1S)) = 2.11 +/- 0.49 (stat.) +/- 0.36 (syst.) pb with a statistical significance of 4.2 sigma.

Originele taal-2	English
Artikelnummer	051101
Tijdschrift	Physical Review D
Volume	96
Nummer van het tijdschrift	5
DOI's	https://doi.org/10.1103/PhysRevD.96.051101
Status	Published - 6-sep.-2017

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10.1103/PhysRevD.96.051101

Evidence for e(+)e(-) gamma eta(c)Final publisher's version, 348 KBLicentie: Taverne

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@article{dd705012ef1e402fab262ab8d06e551a,

title = "Evidence for e+e- →γηc(1S) at center-of-mass energies between 4.01 and 4.60 GeV",

abstract = "We present first evidence for the process e+e- →γηc(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve eta(c)(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section sigma(peak)(e(+)e(-) -> gamma eta(c)(1S)) = 2.11 +/- 0.49 (stat.) +/- 0.36 (syst.) pb with a statistical significance of 4.2 sigma.",

author = "M. Ablikim and Achasov, {M. N.} and S. Ahmed and M. Albrecht and M. Alekseev and A. Amoroso and Z. Haddadi and N. Kalantar-Nayestanaki and M. Kavatsyuk and Messchendorp, {J. G.} and M. Tiemens and {BESIII Collaboration}",

year = "2017",

month = sep,

day = "6",

doi = "10.1103/PhysRevD.96.051101",

language = "English",

volume = "96",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "AMER PHYSICAL SOC",

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TY - JOUR

T1 - Evidence for e+e- →γηc(1S) at center-of-mass energies between 4.01 and 4.60 GeV

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Albrecht, M.

AU - Alekseev, M.

AU - Amoroso, A.

AU - Haddadi, Z.

AU - Kalantar-Nayestanaki, N.

AU - Kavatsyuk, M.

AU - Messchendorp, J. G.

AU - Tiemens, M.

AU - BESIII Collaboration

PY - 2017/9/6

Y1 - 2017/9/6

N2 - We present first evidence for the process e+e- →γηc(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve eta(c)(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section sigma(peak)(e(+)e(-) -> gamma eta(c)(1S)) = 2.11 +/- 0.49 (stat.) +/- 0.36 (syst.) pb with a statistical significance of 4.2 sigma.

AB - We present first evidence for the process e+e- →γηc(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve eta(c)(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section sigma(peak)(e(+)e(-) -> gamma eta(c)(1S)) = 2.11 +/- 0.49 (stat.) +/- 0.36 (syst.) pb with a statistical significance of 4.2 sigma.

U2 - 10.1103/PhysRevD.96.051101

DO - 10.1103/PhysRevD.96.051101

M3 - Article

SN - 1550-7998

VL - 96

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 051101

ER -