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Babusci, D.; Balwierz-Pytko, I.; Bencivenni, G.; Bloise, C.; Bossi, F.; Branchini, P.; Budano, A.; Balkeståhl, L. Caldeira; Ceradini, F.; Ciambrone, P.; Curciarello, F.; Czerwiński, E.; Dané, E.; Leo, V. De; Lucia, E. De; Robertis, G. De; Santis, A. De; Simone, P. De; Cicco, Alessandro Di; Domenico, A. Di; Salvo, R. Di; Domenici, D.; Erriquez, O.; Fanizzi, G.; Fantini, A.; Felici, G.; Fiore, S.; Franzini, P.; Gajos, A.; Gauzzi, P.; Giardina, G.; Giovannella, S.; Graziani, E.; Happacher, F.; Heijkenskjöld, L.; Höistad, B.; Johansson, T.; Kacprzak, K.; Kamińska, D.; Krzemień, W.; Kupść, A.; Lee‐Franzini, J.; Loddo, F.; Loffredo, S.; Mandaglio, G.; Martemianov, M.; Martini, M.; Mascolo, M.; Messi, R.; Miscetti, S.; Morello, G.; Moricciani, D.; Moskal, P.; Nguyen, F.; Palladino, A.; Passeri, A.; Patera, V.; Longhi, I. Prado; Ranieri, A.; Santangelo, P.; Sarra, I.; Schioppa, M.; Sciascia, B.; Silarski, M.; Tortora, L.; Venanzoni, G.; Wiślicki, W.; Wolke, M.; Zdebik, J.

doi:10.1016/j.physletb.2014.08.005

Cited by 102 publications

(79 citation statements)

References 50 publications

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“…No unambiguous signal for a dark photon has been reported so far, and constraints have been set on the mixing strength between the photon and dark photon as a function of the dark photon mass [11][12][13][14][15][16][17][18][19][20][21][22]. Searches for an additional low-mass, dark gauge boson [23] or dark Higgs boson [24] have also yielded negative results.…”

mentioning

confidence: 99%

Search for a Dark Photon ine+e−Collisions atBaBar

Lees¹,

Poireau²,

Tisserand³

et al. 2014

Phys. Rev. Lett.

488

382

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mentioning

confidence: 99%

Search for a Dark Photon ine+e−Collisions atBaBar

Lees¹,

Poireau²,

Tisserand³

et al. 2014

Phys. Rev. Lett.

488

382

View full text Add to dashboard Cite

“…The residual background components were simulated and fitted to the di-muon mass spectrum. The experimental and simulated with PHOKHARA [13] m μμ distributions have shown perfect agreement [6]. As no peak was observed in the spectrum, the CL S technique was used to set a limit on the number of U boson candidates and thus exclude ε 2 larger than 8.6 × 10 −7 -1.6 × 10 −5 for 520 MeV < m U < 980 MeV [6].…”

Section: Search For E + E − → Uγ With U Decaying Into Lepton or Pion mentioning

confidence: 94%

“…Moreover, search for the U boson in such energy range is of special interest as it could explain a number of recent puzzing astrophysical observations such as the excess of positrons in cosmic rays observed by AMS and PAMELA [1,2], 511 keV gamma rays from the galactic centre seen by INTEGRAL [3] or the annual modulation signal measured by DAMA/LIBRA [4]. The KLOE experiment has searched evidence of the U boson existence as a sharp resonance in the invariant mass spectrum of lepton or pion pairs produced in radiative processes e + e − → + − (γ) [5,6], e + e − → π + π − (γ) [7] and in decays of the φ meson [8,9], as well as in the dark Higgsstrahlunng process [10].…”

Section: Introductionmentioning

confidence: 99%

Search for dark forces with KLOE

Gajos

2016

EPJ Web Conf.

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Abstract. During the last years several Dark Sector Models have been proposed in order to address striking astrophysical observations which failed standard interpretations. In the minimal case a new vector particle, the so called dark photon, or A or U boson, is introduced, with small coupling with Standard Model particles. Also, the existence of a dark Higgs boson h is postulated, in analogy with the Standard Model, to give mass to the U boson through the Spontaneous Symmetry Breaking mechanism. The KLOE experiment working at DAΦNE, an e + e − collider operating in Frascati (near Rome), searched for the existence of the U boson investigating three different processes and six different final states: (1) in Dalitz decays of the φ meson φ → ηU, with U → e + e − and η → π + π − π 0 and π 0 π 0 π 0 , (2) in e + e − → Uγ events, with U decaying into lepton and pion pairs, (3) in the dark Higgsstrahlung process, e + e − → Uh , U → μ + μ − , h invisible. Limits on the model parameters have been set at 90 % CL for U boson masses below 1 GeV. Further improvements are expected in terms of sensitivity and discovery potential with the new KLOE-2 detector.

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“…3 (right). KLOE has searched for the Dark Photon below 1 GeV in the μ + μ − [19], the e + e − [20], and more recently also in the π + π − final states [21]. A particulrily competitive parameter range was probed by BABAR below 10 GeV by searching for peaks in the radiative μ + μ − and e + e − spectrum [22].…”

Section: Data Mining Campaigns Using Existing Data Setsmentioning

confidence: 99%

Review of dark photon searches

Denig

2016

EPJ Web Conf.

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Abstract. Dark Photons are hypothetical extra-U(1) gauge bosons, which are motivated by a number of astrophysical anomalies as well as the presently seen deviation between the Standard Model prediction and the direct measurement of the anomalous magnetic moment of the muon, (g − 2) μ . The Dark Photon does not serve as the Dark Matter particle itself, but acts as a messenger particle of a hypothetical Dark Sector with residual interaction to the Standard Model. We review recent Dark Photon searches, which were carried out in a global effort at various hadron and particle physics facilities. We also comment on the perspectives for future invisble searches, which directly probe the existence of Light Dark Matter particles. MotivationDark Photons are hypothetical particles of an extra U(1) gauge group. Such extra U(1) gauge groups are predicted by almost any extension of the Standard Model. Indeed, the related extra U(1) gauge bosons are searched for from the lowest (e.g. searches for axion-like particles) up to the highest energies at the LHC. Recently, the mass range for a vector particle in the MeV to GeV scale has been in the focus of interest due to the observation by Arkani Hamed et al. [1] that particles of such a mass scale might explain a surprisingly large number of astrophysical anomalies. In addition, it was realized that a Dark Photon of such a mass might explain the presently seen deviation between the direct measurement and the Standard Model prediction of the anomalous magnetic moment of the muon, (g − 2) μ [2]. . The lower diagram might give rise to the positron excess presently seen in the spectrum of cosmic rays, which is indeed one of the most striking astrophysical anomalies. Dark Matter (DM) particles annihilate via a Dark Photon into an e + e − pair. Within the kinetic mixing model two free parameters remain: the mass of the Dark Photon, m γ , and the mixing parameter , which parametrizes the strength of the coupling of the Dark Photon to ordinary Standard Model matter: 2 = α /α, where α is the QED fine structure constant. The possible relation of the Dark Photon to the Dark Matter problem as well as the fact that it might explain the (g − 2) μ puzzle, triggered an enormous theoretical and experimental interest in the particle

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Search for light vector boson production ine+e−→μ+μ

Cited by 102 publications

References 50 publications

Search for a Dark Photon ine+e−Collisions atBaBar

Search for a Dark Photon ine+e−Collisions atBaBar

Search for dark forces with KLOE

Review of dark photon searches

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