Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERN

We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e+e- pairs observed in the excited 8Be* nucleus decays. Due to its coupling to electrons, the X could be produced in the bremsstrahlung reaction e-Z -> e-ZX by a 100 GeV e- beam...

Descripción completa

Detalles Bibliográficos
Autores principales: Banerjee, D., Burtsev, V.E., Chumakov, A.G., Cooke, D., Crivelli, P., Depero, E., Dermenev, A.V., Donskov, S.V., Dusaev, R.R., Enik, T., Charitonidis, N., Feshchenko, A., Frolov, V.N., Gardikiotis, A., Gerassimov, S.G., Gninenko, SN, Hösgen, M., Jeckel, M., Karneyeu, A.E., Kekelidze, G., Ketzer, B., Kirpichnikov, D.V., Kirsanov, M.M., Konorov, I.V., Kovalenko, S.G., Kramarenko, V.A., Kravchuk, L.V., Krasnikov, N.V., Kuleshov, S.V., Lyubovitskij, V.E., Lysan, V., Matveev, V.A., Mikhailov, Yu.V., Peshekhonov, D.V., Polyakov, V.A., Radics, B., Rojas, R., Rubbia, A., Samoylenko, V.D., Tikhomirov, V.O., Tlisov, D.A., Toropin, A.N., Trifonov, A.Yu., Vasilishin, B.I., Vasquez Arenas, G., Volkov, P.V., Volkov, V., Ulloa, P.
Lenguaje:eng
Publicado: 2018
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.120.231802
http://cds.cern.ch/record/2308201
_version_ 1780957696709623808
author Banerjee, D.
Burtsev, V.E.
Chumakov, A.G.
Cooke, D.
Crivelli, P.
Depero, E.
Dermenev, A.V.
Donskov, S.V.
Dusaev, R.R.
Enik, T.
Charitonidis, N.
Feshchenko, A.
Frolov, V.N.
Gardikiotis, A.
Gerassimov, S.G.
Gninenko, SN
Hösgen, M.
Jeckel, M.
Karneyeu, A.E.
Kekelidze, G.
Ketzer, B.
Kirpichnikov, D.V.
Kirsanov, M.M.
Konorov, I.V.
Kovalenko, S.G.
Kramarenko, V.A.
Kravchuk, L.V.
Krasnikov, N.V.
Kuleshov, S.V.
Lyubovitskij, V.E.
Lysan, V.
Matveev, V.A.
Mikhailov, Yu.V.
Peshekhonov, D.V.
Polyakov, V.A.
Radics, B.
Rojas, R.
Rubbia, A.
Samoylenko, V.D.
Tikhomirov, V.O.
Tlisov, D.A.
Toropin, A.N.
Trifonov, A.Yu.
Vasilishin, B.I.
Vasquez Arenas, G.
Volkov, P.V.
Volkov, V.
Ulloa, P.
author_facet Banerjee, D.
Burtsev, V.E.
Chumakov, A.G.
Cooke, D.
Crivelli, P.
Depero, E.
Dermenev, A.V.
Donskov, S.V.
Dusaev, R.R.
Enik, T.
Charitonidis, N.
Feshchenko, A.
Frolov, V.N.
Gardikiotis, A.
Gerassimov, S.G.
Gninenko, SN
Hösgen, M.
Jeckel, M.
Karneyeu, A.E.
Kekelidze, G.
Ketzer, B.
Kirpichnikov, D.V.
Kirsanov, M.M.
Konorov, I.V.
Kovalenko, S.G.
Kramarenko, V.A.
Kravchuk, L.V.
Krasnikov, N.V.
Kuleshov, S.V.
Lyubovitskij, V.E.
Lysan, V.
Matveev, V.A.
Mikhailov, Yu.V.
Peshekhonov, D.V.
Polyakov, V.A.
Radics, B.
Rojas, R.
Rubbia, A.
Samoylenko, V.D.
Tikhomirov, V.O.
Tlisov, D.A.
Toropin, A.N.
Trifonov, A.Yu.
Vasilishin, B.I.
Vasquez Arenas, G.
Volkov, P.V.
Volkov, V.
Ulloa, P.
author_sort Banerjee, D.
collection CERN
description We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e+e- pairs observed in the excited 8Be* nucleus decays. Due to its coupling to electrons, the X could be produced in the bremsstrahlung reaction e-Z -> e-ZX by a 100 GeV e- beam incident on an active target in the NA64 experiment at the CERN SPS and observed through the subsequent decay into a e+e- pair. With 5.4x10^10 electrons on target no evidence for such decays was found, allowing to set first limits on the X-e- coupling in the range 1.3x10^-4 <epsilon_e < 4.2x10^-4 excluding part of the allowed parameter space. We also set new bounds on the mixing strength of photons with dark photons (A') from non-observation of the decay A' -> e+e- of the bremsstrahlung A' with a mass < 23 MeV.
id cern-2308201
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling cern-23082012023-10-06T03:02:17Zdoi:10.1103/PhysRevLett.120.231802http://cds.cern.ch/record/2308201engBanerjee, D.Burtsev, V.E.Chumakov, A.G.Cooke, D.Crivelli, P.Depero, E.Dermenev, A.V.Donskov, S.V.Dusaev, R.R.Enik, T.Charitonidis, N.Feshchenko, A.Frolov, V.N.Gardikiotis, A.Gerassimov, S.G.Gninenko, SNHösgen, M.Jeckel, M.Karneyeu, A.E.Kekelidze, G.Ketzer, B.Kirpichnikov, D.V.Kirsanov, M.M.Konorov, I.V.Kovalenko, S.G.Kramarenko, V.A.Kravchuk, L.V.Krasnikov, N.V.Kuleshov, S.V.Lyubovitskij, V.E.Lysan, V.Matveev, V.A.Mikhailov, Yu.V.Peshekhonov, D.V.Polyakov, V.A.Radics, B.Rojas, R.Rubbia, A.Samoylenko, V.D.Tikhomirov, V.O.Tlisov, D.A.Toropin, A.N.Trifonov, A.Yu.Vasilishin, B.I.Vasquez Arenas, G.Volkov, P.V.Volkov, V.Ulloa, P.Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERNParticle Physics - ExperimentWe report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e+e- pairs observed in the excited 8Be* nucleus decays. Due to its coupling to electrons, the X could be produced in the bremsstrahlung reaction e-Z -> e-ZX by a 100 GeV e- beam incident on an active target in the NA64 experiment at the CERN SPS and observed through the subsequent decay into a e+e- pair. With 5.4x10^10 electrons on target no evidence for such decays was found, allowing to set first limits on the X-e- coupling in the range 1.3x10^-4 <epsilon_e < 4.2x10^-4 excluding part of the allowed parameter space. We also set new bounds on the mixing strength of photons with dark photons (A') from non-observation of the decay A' -> e+e- of the bremsstrahlung A' with a mass < 23 MeV.We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e+e- pairs observed in the excited Be*8 nucleus decays. Because of its coupling to electrons, the X could be produced in the bremsstrahlung reaction e-Z→e-ZX by a 100 GeV e- beam incident on an active target in the NA64 experiment at the CERN Super Proton Synchrotron and observed through the subsequent decay into a e+e- pair. With 5.4×1010 electrons on target, no evidence for such decays was found, allowing us to set first limits on the X-e- coupling in the range 1.3×10-4≲εe≲4.2×10-4 excluding part of the allowed parameter space. We also set new bounds on the mixing strength of photons with dark photons (A′) from nonobservation of the decay A′→e+e- of the bremsstrahlung A′ with a mass ≲23  MeV.We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of e+e- pairs observed in the excited Be-8 nucleus decays. Due to its coupling to electrons, the X could be produced in the bremsstrahlung reaction e- Z -> e- Z X by a 100 GeV e- beam incident on an active target in the NA64 experiment at the CERN SPS and observed through the subsequent decay into an e+e- pair. With 5.4\times 10^{10} electrons on target, no evidence for such decays was found, allowing to set first limits on the X-e^- coupling in the range 1.3\times 10^{-4} < \epsilon_e < 4.2\times 10^{-4} excluding part of the allowed parameter space. We also set new bounds on the mixing strength of photons with dark photons (A') from non-observation of the decay A'->e+e- of the bremsstrahlung A' with a mass <~ 23 MeV.arXiv:1803.07748CERN-EP-2018-043oai:cds.cern.ch:23082012018-03-12
spellingShingle Particle Physics - Experiment
Banerjee, D.
Burtsev, V.E.
Chumakov, A.G.
Cooke, D.
Crivelli, P.
Depero, E.
Dermenev, A.V.
Donskov, S.V.
Dusaev, R.R.
Enik, T.
Charitonidis, N.
Feshchenko, A.
Frolov, V.N.
Gardikiotis, A.
Gerassimov, S.G.
Gninenko, SN
Hösgen, M.
Jeckel, M.
Karneyeu, A.E.
Kekelidze, G.
Ketzer, B.
Kirpichnikov, D.V.
Kirsanov, M.M.
Konorov, I.V.
Kovalenko, S.G.
Kramarenko, V.A.
Kravchuk, L.V.
Krasnikov, N.V.
Kuleshov, S.V.
Lyubovitskij, V.E.
Lysan, V.
Matveev, V.A.
Mikhailov, Yu.V.
Peshekhonov, D.V.
Polyakov, V.A.
Radics, B.
Rojas, R.
Rubbia, A.
Samoylenko, V.D.
Tikhomirov, V.O.
Tlisov, D.A.
Toropin, A.N.
Trifonov, A.Yu.
Vasilishin, B.I.
Vasquez Arenas, G.
Volkov, P.V.
Volkov, V.
Ulloa, P.
Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERN
title Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERN
title_full Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERN
title_fullStr Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERN
title_full_unstemmed Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERN
title_short Search for a new X(16.7) boson and dark photons in the NA64 experiment at CERN
title_sort search for a new x(16.7) boson and dark photons in the na64 experiment at cern
topic Particle Physics - Experiment
url https://dx.doi.org/10.1103/PhysRevLett.120.231802
http://cds.cern.ch/record/2308201
work_keys_str_mv AT banerjeed searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT burtsevve searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT chumakovag searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT cooked searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT crivellip searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT deperoe searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT dermenevav searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT donskovsv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT dusaevrr searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT enikt searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT charitonidisn searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT feshchenkoa searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT frolovvn searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT gardikiotisa searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT gerassimovsg searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT gninenkosn searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT hosgenm searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT jeckelm searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT karneyeuae searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT kekelidzeg searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT ketzerb searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT kirpichnikovdv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT kirsanovmm searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT konoroviv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT kovalenkosg searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT kramarenkova searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT kravchuklv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT krasnikovnv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT kuleshovsv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT lyubovitskijve searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT lysanv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT matveevva searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT mikhailovyuv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT peshekhonovdv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT polyakovva searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT radicsb searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT rojasr searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT rubbiaa searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT samoylenkovd searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT tikhomirovvo searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT tlisovda searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT toropinan searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT trifonovayu searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT vasilishinbi searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT vasquezarenasg searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT volkovpv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT volkovv searchforanewx167bosonanddarkphotonsinthena64experimentatcern
AT ulloap searchforanewx167bosonanddarkphotonsinthena64experimentatcern

Ejemplares similares