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Search for a dark vector gauge boson decaying to pi(+)pi(-) using eta ->pi(+)pi(-) gamma decays
Journal article   Open access  Peer reviewed

Search for a dark vector gauge boson decaying to pi(+)pi(-) using eta ->pi(+)pi(-) gamma decays

E. Won, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, V. Bansal, …
Physical review. D, Vol.94(9)
29/11/2016

Abstract

Astronomy & Astrophysics Physical Sciences Physics Physics, Particles & Fields Science & Technology
We report a search for a dark vector gauge boson U' that couples to quarks in the decay chain D*(+) -> D-0 pi(+), D-0 -> K-S(0) eta, eta -> U'gamma, U' -> pi(+)pi- No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of 10(-3)-10(-2) in the U' mass range of 290 to 520 MeV/c(2). This analysis is based on a data sample of 976 fb(-1) collected by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider.
url
https://doi.org/10.1103/PhysRevD.94.092006View
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