Speaker
Mr
I.S. Tiurin
(NRC "Kurchatov Institute" - IHEP)
Description
A high statistics of charged kaon decays is obtained by the OKA collaboration. A missing mass analysis is performed in order to search for a signal from light invisible pseudoscalar axion-like particle (ALP) $a$ in the decay $K^{+} \to \pi^{+} \pi^{0} a$. No signal is observed, based on $3.7\cdot10^9$ $K^{+}$ decays, the 90% CL limit on the branching fraction of the decay varies from $2.5\cdot10^{-6}$ to $2\cdot10^{-7}$ for the ALP mass from 0 to 200 MeV/$c^{2}$, except for the region of $\pi^{0}$ mass, where the upper limit is $4.4\cdot10^{-6}$. The corresponding lower limit for the |$F_{sd}^{A}$| constant, describing the axion coupling to sd-axial vector current is $6.4\cdot10^{7}$ GeV, which is the best limit among HEP experiments.
Primary authors
A. P. Filin
(NRC "Kurchatov Institute" - IHEP)
A.M Blik†
(NRC "Kurchatov Institute" - IHEP)
A.M. Gorin
(NRC "Kurchatov Institute" - IHEP)
A.S. Sadovsky
(NRC "Kurchatov Institute" - IHEP)
A.V. Artamonov
(NRC "Kurchatov Institute" - IHEP)
A.V. Inyakin
(NRC "Kurchatov Institute" - IHEP)
A.V. Okhotnikov
(NRC "Kurchatov Institute" - IHEP)
G.V. Khaustov
(NRC "Kurchatov Institute" - IHEP)
Mr
I.S. Tiurin
(NRC "Kurchatov Institute" - IHEP)
M.V. Medynsky
(NRC "Kurchatov Institute" - IHEP)
O.P. Yushchenko
(NRC "Kurchatov Institute" - IHEP)
S.A. Akimenko†
(NRC "Kurchatov Institute" - IHEP)
S.A. Kholodenko
(NRC "Kurchatov Institute" - IHEP)
S.V. Donskov
(NRC "Kurchatov Institute" - IHEP)
V.A. Lishin
(NRC "Kurchatov Institute" - IHEP)
V.A. Polyakov
(NRC "Kurchatov Institute" - IHEP)
V.A. Uvarov
(NRC "Kurchatov Institute" - IHEP)
V.D. Samoilenko
(NRC "Kurchatov Institute" - IHEP)
V.F. Kurshetsov
(NRC "Kurchatov Institute" - IHEP)
V.F. Obraztsov
(NRC "Kurchatov Institute" - IHEP)
V.I. Romanovsky
(NRC "Kurchatov Institute" - IHEP)
V.I. Rykalin
(NRC "Kurchatov Institute" - IHEP)
V.N. Kolosov
(NRC "Kurchatov Institute" - IHEP)
Co-authors
A.A. Khudyakov
(Institute for Nuclear Research – Russian Academy of Sciences)
A.V. Kulik
(Institute for Nuclear Research – Russian Academy of Sciences)
A.Yu. Polyarush
(Institute for Nuclear Research – Russian Academy of Sciences)
B.Zh. Zalikhanov
(Joint Institute of Nuclear Research)
E.N. Gushchin
(Institute for Nuclear Research – Russian Academy of Sciences)
G.D. Kekelidze
(Joint Institute of Nuclear Research)
S.N. Filippov
(Institute for Nuclear Research – Russian Academy of Sciences)
V.I. Kravtsov
(Institute for Nuclear Research – Russian Academy of Sciences)
V.M. Lysan
(Joint Institute of Nuclear Research)
V.N. Bychkov
(Joint Institute of Nuclear Research)
Yu.G. Kudenko
(Institute for Nuclear Research – Russian Academy of Sciences)
