Limits on neutral light scalar and pseudoscalar particles in a proton beam dump experiment

Blümlein, J.; Brünner, J.; Grabosch, H. J.; Lanius, P.; Nowak, S.; Rethfeldt, C.; Ryseck, H. E.; Walter, Michael; Kiss, D.; Jaki, Z.; Barabash, L.S.; Baranov, S.A.; Batusov, Yu.A.; Bunyatov, S.A.; Денисов, О.; Gorbunov, N.; Karev, A.; Kasarinov, M.Y.; Klimov, O.; Kuznetsov, O.; Ladygin, E.; Lyukov, V.V.; Mojsenz, P.V.; Obudovski, V.P.; Prakhov, S.; Snyatkov, V.I.; Anykeyev, V.B.; Bamburov, N.S.; Борисов, А. А.; Boshko, N. I.; Bugorsky, A.P.; Chernishenko, S.K.; Chukin, G.L.; Fachrutdinov, R.M.; Galjaev, N.A.; Goryachev, V. N.; Kirsanov, M.; Koshin, A. S.; Kravtsov, V. I.; Kulikov, A.; Lipajev, V.V.; Mukhin, A.I.; Mukhin, S.A.; Ryshenkov, V. N.; Salomatin, Y.; Sapunov, Yu.M.; Senko, V.A.; Shestermanov, K. E.; Спиридонов, А.; Sytin, A.N.; Sytnik, V.; Tumakov, V.A.; Vovenko, A.S.; Zhigunov, V.P.; Zudin, Yu.A.

doi:10.1007/bf01548556

Cited by 174 publications

(162 citation statements)

References 24 publications

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“…The couplings to photons in the parameter ranges of interest are close to being probed by beam dump experiments (other limits come from astrophysics and e + + e − → γ + invisible searches, but these are too weak to have any effect) [201]. However, as argued in the previous section, the axion must have a decay length l 1 m so cannot be constrained by the current NuCal [203] and future experiments NA62 [204] and SHiP [205,206]. QCD axions with decay constants ∼ TeV are strongly excluded by the decay K + → π + a that looks like the rare SM process K + → π + νν [207].…”

Section: Other Constraintsmentioning

confidence: 75%

Diphotons from diaxions

Aparicio¹,

Azatov²,

Hardy³

et al. 2016

J. High Energ. Phys.

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We study models in which the 750 GeV diphoton excess is due to a scalar decaying to two pseudo-Nambu-Goldstone bosons that subsequently decay into two pairs of highly boosted photons, misidentified as individual photons. Performing a model independent analysis we find that, with axion mass around 200 MeV, this class of theories can naturally explain the observed signal with a large width, without violating monojet constraints. At the same time the requirement of a prompt axion decay can be satisfied only with a relatively large axion-photon coupling, leading to many new charged particles at the TeV scale. However, the required multiplicities of such fields is still moderately reduced relative to models with direct diphoton production.

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Section: Other Constraintsmentioning

confidence: 75%

Diphotons from diaxions

Aparicio¹,

Azatov²,

Hardy³

et al. 2016

J. High Energ. Phys.

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show abstract

“…(3.5)]. The relevant lower bounds on M A currently come from beam dump experiments [27], in the MeV range, and from star cooling rates, M A ∼ > 0.2 MeV [28].…”

Section: Collider Constraintsmentioning

confidence: 99%

Light axion within the next-to-minimal supersymmetric standard model

Dobrescu

Matchev

2000

J. High Energy Phys.

162

146

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Abstract:We analyze the Higgs sector in the Next-to-Minimal Supersymmetric Standard Model, emphasizing the possibility of a light CP-odd scalar (axion) in the spectrum. We compute the coupling of the Standard-Model-like Higgs boson to a pair of axions, and show that it can be large enough to modify the Higgs branching fractions, with a significant impact on the Higgs searches. We delineate the range of parameters relevant for this scenario, and also derive analytic expressions for the scalar masses and couplings in two special cases -a decoupling limit where all scalars other than the axion are heavier than the Standard-Model-like Higgs boson, and the large tan β limit.

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“…Symmetries of this kind are discussed in various extensions of the Standard Model, see the surveys [6][7][8]. A new U (1) gauge boson γ with masses m γ in the MeV-GeV range extends the Lagrangian of the Standard Model L SM to [6,9,10] …”

Section: Introductionmentioning

confidence: 99%

“…The mixing of the new U (1) and U (1) Y of the Standard Model is induced by loops of heavy particles coupling to both fields [3][4][5]8]. The field X μ is assumed to couple minimally to all charged Standard Model fermions ψ , with effective charge e ψ , where e ψ is the fermionic charge under U (1) Y .…”

Section: Introductionmentioning

confidence: 99%

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New exclusion limits for dark gauge forces from beam-dump data

2011

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We re-analyze published proton beam dump data taken at the U70 accelerator at IHEP Serpukhov with the ν-calorimeter I experiment in 1989 to set mass-coupling limits for dark gauge forces. The corresponding data have been used for axion and light Higgs particle searches in Blümlein et al. (1991Blümlein et al. ( , 1992 [1,2] before. We determine new mass and coupling exclusion bounds for dark gauge bosons.

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Limits on neutral light scalar and pseudoscalar particles in a proton beam dump experiment

Cited by 174 publications

References 24 publications

Diphotons from diaxions

Diphotons from diaxions

Light axion within the next-to-minimal supersymmetric standard model

New exclusion limits for dark gauge forces from beam-dump data

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