Search for production of an invisible dark photon in π0 decays

Gil, E. Cortina; Kleimenova, A.; Minucci, E.; Padolski, S.; Petrov, P.; Shaikhiev, A.; Volpe, R.; Georgiev, G.; Kozhuharov, V.; Litov, L.; Numao, T.; Petrov, Y.; Velghe, B.; Bryman, D. A.; Fu, J.; Husek, T.; Jerhot, Jan; Kampf, Karol; Zamkovsky, M.; Aliberti, R.; Khoriauli, G.; Kunze, J.; Lomidze, D.; Peruzzo, L.; Vormstein, M.; Wanke, R.; Dalpiaz, P.; Fiorini, M.; Neri, Ilaria; Norton, A.; Petrucci, F.; Wahl, H.; Ramusino, A. Cotta; Gianoli, A.; Iacopini, E.; Latino, G.; Lenti, M.; Parenti, A.; Bizzeti, A.; Bucci, F.; Antonelli, A.; Lanfranchi, G.; Mannocchi, G.; Martellotti, S.; Moulson, M.; Spadaro, T.; Ambrosino, F.; Capussela, T.; Corvino, M.; Filippo, D. Di; Massarotti, P.; Mirra, M.; Napolitano, M.; Saracino, G.; Anzivino, G.; Brizioli, Francesco; Imbergamo, E.; Lollini, R.; Piandani, R.; Santoni, C.; Barbanera, M.; Cenci, P.; Checcucci, B.; Lubrano, P.; Lupi, M.; Pepé, M.; Piccini, M.; Costantini, F.; Lella, L. Di; Doble, N.; Giorgi, M. A.; Giudici, S.; Lamanna, G.; Lari, Enrico; Pedreschi, E.; Sozzi, M.; Cerri, C.; Fantechi, R.; Pontisso, L.; Spinella, F.; Mannelli, I.; D’Agostini, G.; Raggi, M.; Biagioni, A.; Leonardi, E.; Lonardo, A.; Valente, P.; Vicini, P.; Ammendola, Roberto; Bonaiuto, V.; Fucci, A.; Salamon, A.; Sargeni, F.; Arcidiacono, R.; Bloch-Devaux, B.; Boretto, M.; Menichetti, E.; Migliore, E.; Soldi, D.; Biino, C.; Filippi, A.; Marchetto, F.; Engelfried, J.; Estrada-Tristan, N.; Bragadireanu, A. M.; Ghinescu, Stefan Alexandru; Hutanu, Ovidiu Emanuel; Enik, T.; Falaleev, V.; Kekelidze, V.; Korotkova, A.; Madigozhin, D.; Misheva, M.; Molokanova, N.; Movchan, S.; Polenkevich, I.; Potrebenikov, Yu.; Shkarovskiy, S.; Zinchenko, A.; Fedotov, S.; Gushchin, E.; Khotyantsev, A.; Kudenko, Y.; Kurochka, V.; Medvedeva, M.; Mefodev, A.; Kholodenko, S.; Kurshetsov, V.; Obraztsov, V.; Ostankov, A.; Semenov, V.; Sugonyaev, V.P.; Yushchenko, O.; Bician, L.; Blažek, T.; Černý, V.; Kučerová, Z.; Bernhard, J.; Ceccucci, A.; Danielsson, H. O.; Simone, N. De; Duval, F.; Döbrich, Babette; Federici, L.; Gamberini, E.; Gatignon, L.; Guida, R.; Hahn, F.; Holzer, Eva Barbara; Jenninger, B.; Koval, M.; Laycock, P.; Miotto, G. Lehmann; Lichard, P.; Mapelli, A.; Marchevski, R.; Massri, Karim; Noy, M.; Palladino, V.; Perrin-Terrin, M.; Pinzino, J.; Ryjov, V.; Schuchmann, S.; Venditti, S.; Bache, T.; Brunetti, Maria Brigida; Duk, V.; Fascianelli, V.; Fry, J. R.; Gonnella, F.; Goudzovski, E.; Iacobuzio, L.; Lazzeroni, C.; Lurkin, N.; Newson, F.; Parkinson, C. J.; Romano, A.; Sergi, A.; Sturgess, A.; Swallow, Joel; Heath, H. F.; Page, Ryan; Trilov, Stoyan Miroslavov; Angelucci, B.; Britton, D.; Graham, C.; Protopopescu, D.; Carmignani, Joseph; Dainton, J. B.; Jones, R. W. L.; Ruggiero, G.; Fulton, L.; Hutchcroft, D.; Maurice, E.; Wrona, B.; Conovaloff, A.; Cooper, P. S.; Coward, D.; Rubin, P.

doi:10.1007/jhep05(2019)182

Cited by 74 publications

(53 citation statements)

References 23 publications

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“…A different new bound on light dark states comes from the NA62 experiment, which has recently improved the constraint on π 0 → γ + inv. by three orders of magnitude [119]. This puts upper bounds on the MDM/EDM interactions of our interest as…”

Section: G Other Experimentsmentioning

confidence: 93%

Dark sector-photon interactions in proton-beam experiments

2020

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We consider electromagnetically neutral dark states that couple to the photon through higher dimensional effective operators, such as electric and magnetic dipole moment, anapole moment and charge radius operators. We investigate the possibility of probing the existence of such dark states, taking a Dirac fermion χ as an example, at several representative proton-beam experiments. As no positive signal has been reported, we obtain upper limits (or projected sensitivities) on the corresponding electromagnetic form factors for dark states lighter than several GeV. We demonstrate that while the current limits from proton-beam experiments are at most comparable with those from high-energy electron colliders, future experiments, such as DUNE and SHiP, will be able to improve the sensitivities to electric and magnetic dipole moment interactions, owing to their high intensity.

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Section: G Other Experimentsmentioning

confidence: 93%

Dark sector-photon interactions in proton-beam experiments

2020

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“…We also present the STCF sensitivity on ε simply assuming about 30 ab −1 data collected at √ s = 2 GeV (dotted magenta), √ s = 4 GeV (dashed blue), √ s = 7 GeV (dot-dashed red), respectively. The pre-existing experimental constraints are also shown, which include the bounds in channels where A is allowed to decay invisibly from the NA62 [20], NA64 [23], BaBar [24], the measurement for BR(K + → π + νν) by the E787 [18] and E949 [19] experiments, as well as the anomalous muon magnetic moment (g − 2)µ favored area [4]. The projected upper limits on ε for the process e + e − → γA (→ invisible), for a 20 fb −1 Belle II data set (solid green) [40] are also given.…”

Section: Results and Calculation Of The Limitmentioning

confidence: 99%

“…In this section, we extend our discussions for the constraints on light thermal dark matter (LTDM). The existence of thermal DM is arguably one of the most compelling possibilities, and has driven much of DM experiments over [24], NA64 [23], NA62 [20] experiments, and the measurement for BR(K + → π + νν) by the E787 [18] and E949 [19] experiments, as well as the anomalous muon magnetic moment (g − 2)µ favored area [4]. The projected upper limits on ε for the process e + e − → γA (→ invisible), for a 20 fb −1 Belle II data set (solid green) [40] are also given.…”

Section: Constraints On Light Thermal Dark Mattermentioning

confidence: 99%

“…e D is the coupling constant of the U D (1) gauge interactions. There are limits on invisible decays of the dark photon from kaon decays by the E787 [18] and E949 [19] experiments, π 0 decays by NA62 [20] experiment, searches for missing energy events in electron-nucleus scattering by NA64 [21][22][23] experiment, and monophoton searches by BaBar [24].…”

Section: Introductionmentioning

confidence: 99%

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Probing invisible decay of a dark photon at BESIII and a future Super Tau Charm Factory via monophoton searches

Zhang

Song

et al. 2019

Phys. Rev. D

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We propose to search the monophoton events at the BESIII detector and future Super Tau Charm Factory to probe the sub-GeV dark photon decay into lighter dark matter. We compute the cross section due to the dark photon associated a standard model photon production, and study the corresponding standard model irreducible/reducible backgrounds. By using the data about 17 fb −1 collected at the BESIII detector since 2011, we derive new leading limits of the mixing strength ε, ε (1.1 − 1.6) × 10 −4 , in the mass range of 0.04 GeV m A 3 GeV. With 30 ab −1 data, STCF running at √ s = 2 GeV, can probe ε down to 5.1×10 −6 when m A = 1 GeV. For models of scalar and fermionic light thermal dark matter production via dark photon, we present the constrains on the dimensionless dark matter parameter y = ε 2 αD(mχ/m A ) 4 as function of the DM mass mχ at BESIII and future STCF, conventionally assuming the dark coupling constant αD = 0.5 and m A = 3mχ. We find that BESIII can exclude model of scalar, Majorana, and pseudo-Dirac (with a small splitting) DM for the mass region 0.03∼1 GeV, 0.04∼1 GeV and 0.4∼1 GeV respectively. For values αD 0.005, combining the results from 2 GeV STCF with 30 ab −1 data and BaBar, one can exclude the above three DM models in the mass region 0.001 GeV mχ 1 GeV.

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“…Figure 4: Upper limit at 90% CL from NA62 [13] (red region) in the ε 2 vs M A plane with A decaying into invisible final states. The limits from the BaBar [14] (blue) and NA64 [15] (light gray) experiments are shown.…”

Section: Pos(lhcp2019)040mentioning

confidence: 99%