We report a study of the processes e(+)e(-)->eta gamma and e(+)e(-)->eta(')gamma at a center-of-mass energy of 10.58 GeV, using a 232 fb(-1) data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 20(-5)(+6)eta gamma and 50(-7)(+8)eta(')gamma events over small backgrounds, and measure the cross sections sigma(e(+)e(-)->eta gamma)=4.5(-1.1)(+1.2)+/- 0.3 fb and sigma(e(+)e(-)->eta(')gamma)=5.4 +/- 0.8 +/- 0.3 fb. The corresponding transition form factors at q(2)=112 GeV2 are q(2)vertical bar F-eta(q(2))vertical bar=0.229 +/- 0.030 +/- 0.008 GeV, and q(2)vertical bar F-eta(')(q(2))vertical bar=0.251 +/- 0.019 +/- 0.008 GeV, respectively.

Measurement of the eta and eta(') transition form factors at q(2)=112 GeV2 RID A-8798-2012 RID C-2728-2008 RID C-5223-2009 RID C-5719-2008 RID D-1055-2009 RID A-2675-2009

LUSIANI, Alberto;
2006

Abstract

We report a study of the processes e(+)e(-)->eta gamma and e(+)e(-)->eta(')gamma at a center-of-mass energy of 10.58 GeV, using a 232 fb(-1) data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 20(-5)(+6)eta gamma and 50(-7)(+8)eta(')gamma events over small backgrounds, and measure the cross sections sigma(e(+)e(-)->eta gamma)=4.5(-1.1)(+1.2)+/- 0.3 fb and sigma(e(+)e(-)->eta(')gamma)=5.4 +/- 0.8 +/- 0.3 fb. The corresponding transition form factors at q(2)=112 GeV2 are q(2)vertical bar F-eta(q(2))vertical bar=0.229 +/- 0.030 +/- 0.008 GeV, and q(2)vertical bar F-eta(')(q(2))vertical bar=0.251 +/- 0.019 +/- 0.008 GeV, respectively.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/6777
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 81
  • ???jsp.display-item.citation.isi??? 71
social impact