Journal
PHYSICS LETTERS B
Volume 720, Issue 1-3, Pages 111-115Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2013.01.067
Keywords
e(+)e(-) Collisions; Dark forces; Gauge vector boson
Funding
- EU Integrated Infrastructure Initiative Hadron Physics Project [RII3-CT-2004-506078]
- European Commission
- Programme through the 'Research Infrastructures' action of the 'Capacities' Programme [227431]
- Polish National Science Centre [0469/B/H03/2009/37, 0309/B/H03/2011/40, DEC-2011/03/N/ST2/02641, 2011/01/D/ST2/00748]
- Foundation for Polish Science through the MPD programme
- HOMING PLUS [BIS/2011-4/3]
Ask authors/readers for more resources
We present a new limit on the production of a light dark-force mediator with the KLOE detector at DA Phi NE. This boson, called U, has been searched for in the decay phi -> eta U, U -> e(+)e(-), analyzing the. decay eta -> pi(0)pi(0)pi(0) in a data sample of 1.7 fb(-1). No structures are observed in the e(+)e(-) invariant mass distribution over the background. This search is combined with a previous result obtained from the decay eta -> pi(+)pi(-)pi(0), increasing the sensitivity. We set an upper limit at 90% C.L. on the ratio between the U boson coupling constant and the fine structure constant of alpha'/alpha < 1.7 x 10(-5) for 30 < M-U < 400 MeV and alpha'/alpha <= 8 x 10(-6) for the sub-region 50 < M-U <210 MeV. This result assumes the Vector Meson Dominance expectations for the phi eta gamma* transition form factor. The dependence of this limit on the transition form factor has also been studied. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available