We present the first experimental search for the rare charm decay D-0 -> pi(0)nu(nu) over bar. It is based on an e(+)e(-) collision sample consisting of 10.6 x 10(6) pairs of D-0(D) over bar (0) mesons collected by the BESIII detector at root s = 3.773 GeV, corresponding to an integrated luminosity of 2.93 fb(-1). A data-driven method is used to ensure the reliability of the background modeling. No significant D-0 -> pi(0)nu(nu) over bar signal is observed in data and an upper limit of the branching fraction is set to be 2.1 x 10(-4) at the 90% confidence level. This is the first experimental constraint on charmed-hadron decays into dineutrino final states.
Search for the decay D-0 -> pi(0)nu(nu)over-bar
Amoroso, A;Bianchi, F;Bortone, A;Destefanis, M;De Mori, F;Fava, L;Greco, M;Hu, JF;Lavezzi, L;Maggiora, M;Marcello, S;Rivetti, A;Sosio, S;Spataro, S;Yan, L;
2022-01-01
Abstract
We present the first experimental search for the rare charm decay D-0 -> pi(0)nu(nu) over bar. It is based on an e(+)e(-) collision sample consisting of 10.6 x 10(6) pairs of D-0(D) over bar (0) mesons collected by the BESIII detector at root s = 3.773 GeV, corresponding to an integrated luminosity of 2.93 fb(-1). A data-driven method is used to ensure the reliability of the background modeling. No significant D-0 -> pi(0)nu(nu) over bar signal is observed in data and an upper limit of the branching fraction is set to be 2.1 x 10(-4) at the 90% confidence level. This is the first experimental constraint on charmed-hadron decays into dineutrino final states.
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