Search for a massless dark photon in c → u γ ′ decays

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doi:10.1103/PhysRevD.111.L011103

Title: Search for a massless dark photon in $c \to u γ^{'}$ decays

Journal Article · 23 January 2025 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.111.L011103 · OSTI ID:2506922

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Afedulidis, O.; Ai, X. C.; Aliberti, R.; Amoroso, A.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Bao, H. -R.; Batozskaya, V.; Begzsuren, K.; Berger, N.; Berlowski, M.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bianco, E. more »

Using $7.9 f b^{- 1}$ of $e^{+} e^{-}$ collision data collected at $\sqrt{s} = 3.773 GeV$ with the BESIII detector at the BEPCII collider, we search for the massless dark photon with the flavor-changing neutral current processes $D^{0} \to ω γ^{'}$ and $D^{0} \to γ γ^{'}$ for the first time. No significant signals are observed, and the upper limits at the 90% confidence level on the massless dark photon branching fraction are set to be $1.1 \times 10^{- 5}$ and $2.0 \times 10^{- 6}$ for $D^{0} \to ω γ^{'}$ and $D^{0} \to γ γ^{'}$ , respectively. These results provide the most stringent constraint on the new physics energy scale associated with $c u γ^{'}$ coupling in the world, with the new physics energy scale related parameter $| C |^{2} + | C_{5} |^{2} < 8.2 \times 10^{- 17} {GeV}^{- 2}$ at the 90% confidence level. Published by the American Physical Society 2025

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Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-05ER41374

OSTI ID:: 2506922

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 111; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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FCNC decays of standard model fermions into a dark photon Gabrielli, Emidio; Mele, Barbara; Raidal, Martti Physical Review D, Vol. 94, Issue 11 https://doi.org/10.1103/PhysRevD.94.115013	journal	December 2016
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Study of the Dalitz decay J / ψ → e + e − η Ablikim, M.; Achasov, M. N.; Ahmed, S. Physical Review D, Vol. 99, Issue 1 https://doi.org/10.1103/PhysRevD.99.012006	journal	January 2019
Measurement of B ( J / ψ → η ′ e + e − ) and search for a dark photon Ablikim, M.; Achasov, M. N.; Ahmed, S. Physical Review D, Vol. 99, Issue 1 https://doi.org/10.1103/PhysRevD.99.012013	journal	January 2019
Dark-Disk Universe Fan, JiJi; Katz, Andrey; Randall, Lisa Physical Review Letters, Vol. 110, Issue 21 https://doi.org/10.1103/PhysRevLett.110.211302	journal	May 2013
Search for a Dark Photon in e + e − Collisions at BaBar Lees, J. P.; Poireau, V.; Tisserand, V. Physical Review Letters, Vol. 113, Issue 20 https://doi.org/10.1103/PhysRevLett.113.201801	journal	November 2014
Observation of D 0 → ρ 0 γ and Search for C P Violation in Radiative Charm Decays Nanut, T.; Zupanc, A.; Adachi, I. Physical Review Letters, Vol. 118, Issue 5 https://doi.org/10.1103/PhysRevLett.118.051801	journal	January 2017
Hunting Down Massless Dark Photons in Kaon Physics Fabbrichesi, M.; Gabrielli, E.; Mele, B. Physical Review Letters, Vol. 119, Issue 3 https://doi.org/10.1103/PhysRevLett.119.031801	journal	July 2017
Search for Invisible Decays of a Dark Photon Produced in e + e − Collisions at BaBar Lees, J. P.; Poireau, V.; Tisserand, V. Physical Review Letters, Vol. 119, Issue 13 https://doi.org/10.1103/PhysRevLett.119.131804	journal	September 2017
Search for A ′ → μ + μ − Decays Aaij, R.; Abellán Beteta, C.; Ackernley, T. Physical Review Letters, Vol. 124, Issue 4 https://doi.org/10.1103/PhysRevLett.124.041801	journal	January 2020
Search for Light Dark Matter with NA64 at CERN Andreev, Yu. M.; Banerjee, D.; Banto Oberhauser, B. Physical Review Letters, Vol. 131, Issue 16 https://doi.org/10.1103/PhysRevLett.131.161801	journal	October 2023
Direct Measurements of Charmed- D -Meson Hadronic Branching Fractions Baltrusaitis, R. M.; Becker, J. J.; Blaylock, G. T. Physical Review Letters, Vol. 56, Issue 20 https://doi.org/10.1103/PhysRevLett.56.2140	journal	May 1986
Massless Gauge Bosons other than the Photon Dobrescu, Bogdan A. Physical Review Letters, Vol. 94, Issue 15 https://doi.org/10.1103/PhysRevLett.94.151802	journal	April 2005
Kaon decays shedding light on massless dark photons Su, Jhih-Ying; Tandean, Jusak The European Physical Journal C, Vol. 80, Issue 9 https://doi.org/10.1140/epjc/s10052-020-8338-3	journal	September 2020
Explaining the $B^+\rightarrow K^+ \nu \bar{\nu }$ excess via a massless dark photon Gabrielli, Emidio; Marzola, Luca; Müürsepp, Kristjan The European Physical Journal C, Vol. 84, Issue 5 https://doi.org/10.1140/epjc/s10052-024-12818-2	journal	May 2024
LHCb detector performance International Journal of Modern Physics A, Vol. 30, Issue 07, 1530022 https://doi.org/10.1142/S0217751X15300227	journal	March 2015
Mirror Matter-Type dark Matter Foot, R. International Journal of Modern Physics D, Vol. 13, Issue 10 https://doi.org/10.1142/S0218271804006449	journal	December 2004
Dark Photon Searches via Higgs Boson Production at the LHC and Beyond Biswas, Sanjoy; Gabrielli, Emidio; Mele, Barbara Symmetry, Vol. 14, Issue 8 https://doi.org/10.3390/sym14081522	journal	July 2022