Search for D-0 -> gamma gamma and improved measurement of the branching fraction for D-0 -> pi(0)pi(0)

BESIII Collaboration

doi:10.1103/PhysRevD.91.112015

Search for D-0 -> gamma gamma and improved measurement of the branching fraction for D-0 -> pi(0)pi(0)

BESIII Collaboration

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Abstract

Using 2.92 fb(-1) of electron-positron annihilation data collected at root s = 3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D-0 -> gamma gamma using a double-tag technique. We find no signal and set an upper limit at 90% confidence level for the branching fraction of B(D-0 -> gamma gamma <3.8 x 10(-6). We also investigate D-0-meson decay into two neutral pions, obtaining a branching fraction of B(D-0 -> pi(0)pi(0)) = (8.24 +/- 0.21(stat) +/- 0.30(syst)) x 10(-4), the most precise measurement to date and consistent with the current world average.

Original language	English
Article number	112015
Number of pages	10
Journal	Physical Review D
Volume	91
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.91.112015
Publication status	Published - 26-Jun-2015

Keywords

FLAVOR FACTORIES
CHARM DECAY

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10.1103/PhysRevD.91.112015

Search for D-0 -> gamma gamma and improved measurement of the branching fraction for D-0 -> pi(0)pi(0)Final publisher's version, 589 KBLicence: Taverne

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@article{43db233001c1471ca5d55f658ca7b128,

title = "Search for D-0 -> gamma gamma and improved measurement of the branching fraction for D-0 -> pi(0)pi(0)",

abstract = "Using 2.92 fb(-1) of electron-positron annihilation data collected at root s = 3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D-0 -> gamma gamma using a double-tag technique. We find no signal and set an upper limit at 90% confidence level for the branching fraction of B(D-0 -> gamma gamma <3.8 x 10(-6). We also investigate D-0-meson decay into two neutral pions, obtaining a branching fraction of B(D-0 -> pi(0)pi(0)) = (8.24 +/- 0.21(stat) +/- 0.30(syst)) x 10(-4), the most precise measurement to date and consistent with the current world average.",

keywords = "FLAVOR FACTORIES, CHARM DECAY",

author = "M. Ablikim and Achasov, {M. N.} and X.C. Ai and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and A. Amorose and O. Bondarenko and Z. Haddadi and N. Kalantar-Nayestanaki and M. Kavatsyuk and H. Loehner and J.G. Messchendorp and M. Tiemens and {BESIII Collaboration}",

year = "2015",

month = jun,

day = "26",

doi = "10.1103/PhysRevD.91.112015",

language = "English",

volume = "91",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "AMER PHYSICAL SOC",

number = "11",

}

TY - JOUR

T1 - Search for D-0 -> gamma gamma and improved measurement of the branching fraction for D-0 -> pi(0)pi(0)

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ai, X.C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amorose, A.

AU - Bondarenko, O.

AU - Haddadi, Z.

AU - Kalantar-Nayestanaki, N.

AU - Kavatsyuk, M.

AU - Loehner, H.

AU - Messchendorp, J.G.

AU - Tiemens, M.

AU - BESIII Collaboration

PY - 2015/6/26

Y1 - 2015/6/26

N2 - Using 2.92 fb(-1) of electron-positron annihilation data collected at root s = 3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D-0 -> gamma gamma using a double-tag technique. We find no signal and set an upper limit at 90% confidence level for the branching fraction of B(D-0 -> gamma gamma <3.8 x 10(-6). We also investigate D-0-meson decay into two neutral pions, obtaining a branching fraction of B(D-0 -> pi(0)pi(0)) = (8.24 +/- 0.21(stat) +/- 0.30(syst)) x 10(-4), the most precise measurement to date and consistent with the current world average.

AB - Using 2.92 fb(-1) of electron-positron annihilation data collected at root s = 3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D-0 -> gamma gamma using a double-tag technique. We find no signal and set an upper limit at 90% confidence level for the branching fraction of B(D-0 -> gamma gamma <3.8 x 10(-6). We also investigate D-0-meson decay into two neutral pions, obtaining a branching fraction of B(D-0 -> pi(0)pi(0)) = (8.24 +/- 0.21(stat) +/- 0.30(syst)) x 10(-4), the most precise measurement to date and consistent with the current world average.

KW - FLAVOR FACTORIES

KW - CHARM DECAY

U2 - 10.1103/PhysRevD.91.112015

DO - 10.1103/PhysRevD.91.112015

M3 - Article

SN - 1550-7998

VL - 91

JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 112015

ER -

Search for D-0 -> gamma gamma and improved measurement of the branching fraction for D-0 -> pi(0)pi(0)

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Keywords

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