Search for $A'\!\to\!μ^+μ^-$ decays
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Beteta, C. Abellán
name: Ackernley, T.
name: Adeva, B.
name: Adinolfi, M.
name: Afsharnia, H.
name: Aidala, C. A.
name: Aiola, S.
name: Ajaltouni, Z.
name: Akar, S.
name: Albicocco, P.
name: Albrecht, J.
name: Alessio, F.
name: Alexander, M.
name: Albero, A. Alfonso
name: Alkhazov, G.
name: Cartelle, P. Alvarez
name: Alves, A. A.
name: Amato, S.
name: Amhis, Y.
name: An, L.
name: Anderlini, L.
name: Andreassi, G.
name: Andreotti, M.
name: Archilli, F.
name: Romeu, J. Arnau
name: Artamonov, A.
name: Artuso, M.
name: Arzymatov, K.
name: Aslanides, E.
name: Atzeni, M.
name: Audurier, B.
name: Bachmann, S.
name: Back, J. J.
name: Baker, S.
name: Balagura, V.
name: Baldini, W.
name: Baranov, A.
name: Barlow, R. J.
name: Barsuk, S.
name: Barter, W.
name: Bartolini, M.
name: Baryshnikov, F.
name: Bassi, G.
name: Batozskaya, V.
name: Batsukh, B.
name: Battig, A.
name: Battista, V.
name: Bay, A.
name: Becker, M.
name: Bedeschi, F.
name: Bediaga, I.
name: Beiter, A.
name: Bel, L. J.
name: Belavin, V.
name: Belin, S.
name: Beliy, N.
name: Bellee, V.
name: Belous, K.
name: Belyaev, I.
name: Bencivenni, G.
name: Ben-Haim, E.
name: Benson, S.
name: Beranek, S.
name: Berezhnoy, A.
name: Bernet, R.
name: Berninghoff, D.
name: Bernstein, H. C.
name: Bertholet, E.
name: Bertolin, A.
name: Betancourt, C.
name: Betti, F.
name: Bettler, M. O.
name: Bezshyiko, Ia.
name: Bhasin, S.
name: Bhom, J.
name: Bieker, M. S.
name: Bifani, S.
name: Billoir, P.
name: Bizzeti, A.
name: Bjørn, M.
name: Blago, M. P.
name: Blake, T.
name: Blanc, F.
name: Blusk, S.
name: Bobulska, D.
name: Bocci, V.
name: Garcia, O. Boente
name: Boettcher, T.
name: Boldyrev, A.
name: Bondar, A.
name: Bondar, N.
name: Borghi, S.
name: Borisyak, M.
name: Borsato, M.
name: Borsuk, J. T.
name: Bowcock, T. J. V.
name: Bozzi, C.
name: Braun, S.
name: Rodriguez, A. Brea
name: Brodski, M.
name: Brodzicka, J.
name: Gonzalo, A. Brossa
name: Brundu, D.
name: Buchanan, E.
name: Buonaura, A.
name: Burr, C.
name: Bursche, A.
name: Butter, J. S.
name: Buytaert, J.
name: Byczynski, W.
name: Cadeddu, S.
name: Cai, H.
name: Calabrese, R.
name: Diaz, L. Calero
name: Cali, S.
name: Calladine, R.
name: Calvi, M.
name: Gomez, M. Calvo
name: Camboni, A.
name: Campana, P.
name: Perez, D. H. Campora
name: Capriotti, L.
name: Carbone, A.
name: Carboni, G.
name: Cardinale, R.
name: Cardini, A.
name: Carniti, P.
name: Akiba, K. Carvalho
name: Vidal, A. Casais
name: Casse, G.
name: Cattaneo, M.
name: Cavallero, G.
name: Cenci, R.
name: Cerasoli, J.
name: Chapman, M. G.
name: Charles, M.
name: Charpentier, Ph.
name: Chatzikonstantinidis, G.
name: Chefdeville, M.
name: Chekalina, V.
name: Chen, C.
name: Chen, S.
name: Chernov, A.
name: Chitic, S. -G.
name: Chobanova, V.
name: Chrzaszcz, M.
name: Chubykin, A.
name: Ciambrone, P.
name: Cicala, M. F.
name: Vidal, X. Cid
name: Ciezarek, G.
name: Cindolo, F.
name: Clarke, P. E. L.
name: Clemencic, M.
name: Cliff, H. V.
name: Closier, J.
name: Cobbledick, J. L.
name: Coco, V.
name: Coelho, J. A. B.
name: Cogan, J.
name: Cogneras, E.
name: Cojocariu, L.
name: Collins, P.
name: Colombo, T.
name: Comerma-Montells, A.
name: Contu, A.
name: Cooke, N.
name: Coombs, G.
name: Coquereau, S.
name: Corti, G.
name: Sobral, C. M. Costa
name: Couturier, B.
name: Craik, D. C.
name: Crkovska, J.
name: Crocombe, A.
name: Torres, M. Cruz
name: Currie, R.
name: Da Silva, C. L.
name: Dall'Occo, E.
name: Dalseno, J.
name: D'Ambrosio, C.
name: Danilina, A.
name: d'Argent, P.
name: Davis, A.
name: Francisco, O. De Aguiar
name: De Bruyn, K.
name: De Capua, S.
name: De Cian, M.
name: De Miranda, J. M.
name: De Paula, L.
name: De Serio, M.
name: De Simone, P.
name: de Vries, J. A.
name: Dean, C. T.
name: Dean, W.
name: Decamp, D.
name: Del Buono, L.
name: Delaney, B.
name: Dembinski, H. -P.
name: Demmer, M.
name: Dendek, A.
name: Denysenko, V.
name: Derkach, D.
name: Deschamps, O.
name: Desse, F.
name: Dettori, F.
name: Dey, B.
name: Di Canto, A.
name: Di Nezza, P.
name: Didenko, S.
name: Dijkstra, H.
name: Dordei, F.
name: Dorigo, M.
name: Reis, A. C. dos
name: Douglas, L.
name: Dovbnya, A.
name: Dreimanis, K.
name: Dudek, M. W.
name: Dufour, L.
name: Dujany, G.
name: Durante, P.
name: Durham, J. M.
name: Dutta, D.
name: Dzhelyadin, R.
name: Dziewiecki, M.
name: Dziurda, A.
name: Dzyuba, A.
name: Easo, S.
name: Egede, U.
name: Egorychev, V.
name: Eidelman, S.
name: Eisenhardt, S.
name: Ekelhof, R.
name: Ek-In, S.
name: Eklund, L.
name: Ely, S.
name: Ene, A.
name: Escher, S.
name: Esen, S.
name: Evans, T.
name: Falabella, A.
name: Fan, J.
name: Farley, N.
name: Farry, S.
name: Fazzini, D.
name: Féo, M.
name: Declara, P. Fernandez
name: Prieto, A. Fernandez
name: Ferrari, F.
name: Lopes, L. Ferreira
name: Rodrigues, F. Ferreira
name: Sole, S. Ferreres
name: Ferrillo, M.
name: Ferro-Luzzi, M.
name: Filippov, S.
name: Fini, R. A.
name: Fiorini, M.
name: Firlej, M.
name: Fischer, K. M.
name: Fitzpatrick, C.
name: Fiutowski, T.
name: Fleuret, F.
name: Fontana, M.
name: Fontanelli, F.
name: Forty, R.
name: Lima, V. Franco
name: Sevilla, M. Franco
name: Frank, M.
name: Frei, C.
name: Friday, D. A.
name: Fu, J.
name: Fuehring, M.
name: Funk, W.
name: Gabriel, E.
name: Torreira, A. Gallas
name: Galli, D.
name: Gallorini, S.
name: Gambetta, S.
name: Gan, Y.
name: Gandelman, M.
name: Gandini, P.
name: Gao, Y.
name: Martin, L. M. Garcia
name: Pardiñas, J. García
name: Plana, B. Garcia
name: Rosales, F. A. Garcia
name: Tico, J. Garra
name: Garrido, L.
name: Gascon, D.
name: Gaspar, C.
name: Gerick, D.
name: Gersabeck, E.
name: Gersabeck, M.
name: Gershon, T.
name: Gerstel, D.
name: Ghez, Ph.
name: Gibson, V.
name: Gioventù, A.
name: Girard, O. G.
name: Gironell, P. Gironella
name: Giubega, L.
name: Giugliano, C.
name: Gizdov, K.
name: Gligorov, V. V.
name: Göbel, C.
name: Golubkov, D.
name: Golutvin, A.
name: Gomes, A.
name: Gorbounov, P.
name: Gorelov, I. V.
name: Gotti, C.
name: Govorkova, E.
name: Grabowski, J. P.
name: Diaz, R. Graciani
name: Grammatico, T.
name: Cardoso, L. A. Granado
name: Graugés, E.
name: Graverini, E.
name: Graziani, G.
name: Grecu, A.
name: Greim, R.
name: Griffith, P.
name: Grillo, L.
name: Gruber, L.
name: Cazon, B. R. Gruberg
name: Gu, C.
name: Gushchin, E.
name: Guth, A.
name: Guz, Yu.
name: Gys, T.
name: Hadavizadeh, T.
name: Haefeli, G.
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name: Haines, S. C.
name: Hamilton, P. M.
name: Han, Q.
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name: Hansmann-Menzemer, S.
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name: Harrison, T.
name: Hart, R.
name: Hasse, C.
name: Hatch, M.
name: He, J.
name: Hecker, M.
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name: Heinicke, K.
name: Heister, A.
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name: Heuel, J.
name: Hicheur, A.
name: Charman, R. Hidalgo
name: Hill, D.
name: Hilton, M.
name: Hopchev, P. H.
name: Hu, J.
name: Hu, W.
name: Huang, W.
name: Hulsbergen, W.
name: Humair, T.
name: Hunter, R. J.
name: Hushchyn, M.
name: Hutchcroft, D.
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name: Inglessi, A.
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name: Jacobsson, R.
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name: Jiang, F.
name: John, M.
name: Johnson, D.
name: Jones, C. R.
name: Jost, B.
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name: Kandybei, S.
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name: Kariuki, J. M.
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name: Kenzie, M.
name: Ketel, T.
name: Khanji, B.
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name: Kim, K. E.
name: Kirn, T.
name: Kirsebom, V. S.
name: Klaver, S.
name: Klimaszewski, K.
name: Koliiev, S.
name: Kondybayeva, A.
name: Konoplyannikov, A.
name: Kopciewicz, P.
name: Kopecna, R.
name: Koppenburg, P.
name: Kostiuk, I.
name: Kot, O.
name: Kotriakhova, S.
name: Kravchuk, L.
name: Krawczyk, R. D.
name: Kreps, M.
name: Kress, F.
name: Kretzschmar, S.
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Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Searches are performed for both prompt-like and long-lived dark photons, $A'$, produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look for $A'\!\to\!μ^+μ^-$ decays using a data sample corresponding to an integrated luminosity of 5.5/fb collected with the LHCb detector. Neither search finds evidence for a signal, and 90% confidence-level exclusion limits are placed on the $γ$-$A'$ kinetic-mixing strength. The prompt-like $A'$ search explores the mass region from near the dimuon threshold up to 70 GeV, and places the most stringent constraints to date on dark photons with $214 &lt; m(A') \lesssim 740$ MeV and $10.6 &lt; m(A') \lesssim 30$ GeV. The search for long-lived $A'\!\to\!μ^+μ^-$ decays places world-leading constraints on low-mass dark photons with lifetimes $\mathcal{O}(1)$ ps.
description: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-031.html (LHCb public pages)