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  • Anastasi, A.INFN, Lab Nazl Frascati, Frascati, Italy;Univ Messina, Sci Fis & Sci Terra, Dipartimento Sci Matemat & Informat, Messina, Italy (author)

Combined limit on the production of a light gauge boson decaying into mu(+) mu(-) and pi(+) pi(-)

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • ELSEVIER SCIENCE BV,2018
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-368113
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-368113URI
  • https://doi.org/10.1016/j.physletb.2018.08.012DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • We searched for the mu(+) mu(-) decay of a light vector gauge boson, also known as dark photon, in the e(+) e(-) -> mu(+) mu(-) gamma(ISR) process by means of the Initial State Radiation (ISR) method. We used 1.93fb(-1) of data collected by the KLOE experiment at the DA Phi NE phi-factory. No structures have been observed over the irreducible mu(+) mu(-) background. A 90% CL limit on the ratio epsilon(2)= alpha'/alpha between the dark coupling constant and the fine structure constant of 3 x 10(-6)-2 x 10(-7) has been set in the dark photon mass region between 519 MeV and 973 MeV. This new limit has been combined with the published result obtained investigating the hypothesis of the dark photon decaying into hadrons in e(+) e(-) -> pi(+) pi(-) gamma(ISR) events. The combined 90% CL limit increases the sensitivity especially in the rho-omega interference region and excludes epsilon(2) greater than (13 - 2) x 10(-7). For dark photon masses greater than 600 MeV the combined limit is lower than 8 x 10(-7) resulting more stringent than present constraints from other experiments.

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  • Babusci, D.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Berlowski, M.INFN, Lab Nazl Frascati, Frascati, Italy;Natl Ctr Nucl Res, Warsaw, Poland (author)
  • Bloise, C.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Bossi, F.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Branchini, R.INFN, Sez Roma Tre, Rome, Italy (author)
  • Budano, A.Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy (author)
  • Cao, BoUppsala universitet,Kärnfysik(Swepub:uu)boaca926 (author)
  • Ceradini, F.Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy (author)
  • Ciambrone, R.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Curciarello, F.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Czerwinski, E.Jagiellonian Univ, Inst Phys, Krakow, Poland (author)
  • D'Agostini, G.Univ Sapienza, Dipartimento Fis, Rome, Italy;INFN, Sez Roma, Rome, Italy (author)
  • Dane, E.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • De Leo, V.INFN, Sez Roma Tor Vergata, Rome, Italy (author)
  • De Lucia, E.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • De Santis, A.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • De Simone, R.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Di Cicco, A.Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy (author)
  • Di Domenico, A.Univ Sapienza, Dipartimento Fis, Rome, Italy;INFN, Sez Roma, Rome, Italy (author)
  • Domenici, D.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • D'Uffizi, A.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Fantini, A.Univ Tor Vergata, Dipartimento Fis, Rome, Italy;INFN, Sez Roma Tor Vergata, Rome, Italy (author)
  • Fantini, G.Gran Sasso Sci Inst, Laquila, Italy (author)
  • Fermani, R.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Fiore, S.INFN, Sez Roma, Rome, Italy;ENEA, Dept Fus & Technol Nucl Safety & Secur, Frascati, RM, Italy (author)
  • Gajos, A.Jagiellonian Univ, Inst Phys, Krakow, Poland (author)
  • Gauzzi, R.Univ Sapienza, Dipartimento Fis, Rome, Italy;INFN, Sez Roma, Rome, Italy (author)
  • Giovannella, S.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Graziani, E.INFN, Sez Roma Tre, Rome, Italy (author)
  • Ivanov, V. L.Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia (author)
  • Johansson, TordUppsala universitet,Kärnfysik(Swepub:uu)tordjoha (author)
  • Kang, X.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Kisielewska-Kaminska, D.Jagiellonian Univ, Inst Phys, Krakow, Poland (author)
  • Kozyrev, E. A.Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia (author)
  • Krzemien, W.Natl Ctr Nucl Res, Warsaw, Poland (author)
  • Kupsc, AndrzejUppsala universitet,Kärnfysik(Swepub:uu)andrkups (author)
  • Lukin, P. A.Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia (author)
  • Mandaglio, G.INFN, Sez Catania, Catania, Italy;Univ Messina, Dipartimento Sci Chim, Biol Farmaceut & Ambientali, Messina, Italy (author)
  • Martini, M.INFN, Lab Nazl Frascati, Frascati, Italy;Univ Guglielmo Marconi, Dipartimento Sci & Tecnol Appl, Rome, Italy (author)
  • Messi, R.Univ Tor Vergata, Dipartimento Fis, Rome, Italy;INFN, Sez Roma Tor Vergata, Rome, Italy (author)
  • Miscetti, S.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Moricciani, D.INFN, Sez Roma Tor Vergata, Rome, Italy (author)
  • Moskal, R.Jagiellonian Univ, Inst Phys, Krakow, Poland (author)
  • Passeri, A.INFN, Sez Roma Tre, Rome, Italy (author)
  • Patera, V.Univ Sapienza, Dipartimento Sci Base & Appl Ingn, Rome, Italy;INFN, Sez Roma, Rome, Italy (author)
  • del Rio, E. PerezINFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Raha, N.INFN, Sez Roma Tor Vergata, Rome, Italy (author)
  • Santangelo, R.INFN, Lab Nazl Frascati, Frascati, Italy (author)
  • Schioppa, M.Univ Calabria, Dipartimento Fis, Arcavacata Di Rende, Italy;INFN, Grp Collegato Cosenza, Arcavacata Di Rende, Italy (author)
  • Selce, A.Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy (author)
  • Silarski, M.Jagiellonian Univ, Inst Phys, Krakow, Poland (author)
  • Sirghi, F.INFN, Lab Nazl Frascati, Frascati, Italy;Horia Hulubei Natl Inst Phys & Nucl Engn, Magurele, Romania (author)
  • Solodov, E. P.Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia (author)
  • Tortora, L.INFN, Sez Roma Tre, Rome, Italy (author)
  • Venanzoni, G.INFN, Sez Pisa, Pisa, Italy (author)
  • Wislicki, W.Natl Ctr Nucl Res, Warsaw, Poland (author)
  • Wolke, MagnusUppsala universitet,Kärnfysik(Swepub:uu)mawol031 (author)
  • INFN, Lab Nazl Frascati, Frascati, Italy;Univ Messina, Sci Fis & Sci Terra, Dipartimento Sci Matemat & Informat, Messina, ItalyINFN, Lab Nazl Frascati, Frascati, Italy (creator_code:org_t)

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  • In:Physics Letters B: ELSEVIER SCIENCE BV784, s. 336-3410370-26931873-2445

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