Search for light pseudoscalar sgoldstino in K- decays

Abstract

A search for the light pseudoscalar sgoldstino production in the three body K- decay K-->pipi0P has been performed with the ISTRA+ detector exposed to the 25 GeV negative secondary beam of the U70 proton synchrotron. No signal is seen. An upper limit for the branching ratio Br(K->pipi0P), at 90% confidence level, is found to be around 9*10**-6 in the effective mass m(P) range from 0 till 200 MeV, excluding the region near m(pi0) where it degrades to 3.5*10**-5.

arXiv comment10 pages, LATEX, 8 EPS figures, revised version, to be published in Phys.Lett.B

References in corpus (9)

• Theories with Gauge-Mediated Supersymmetry Breaking
• Improved Measurement of the K+ to pi+ nu nubar Branching Ratio
• Further search for the decay $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ in the momentum region P < 195 MeV/c
• Gauge mechanism of mediation of supersymmetry breaking
• Kaon Physics with Light Sgoldstinos and Parity Conservation
• Search for the Decay K+ -> pi+ pi0 nu nubar
• Measurement of the Dalitz plot slope parameters for K- -> pi0 pi0 pi- decay using ISTRA+ detector
• Study of the K- -> mu- nu pi0 decay
• Study of the K- -> pi0 e- nu decay

Cited by in corpus (5)

• Experiments with K-Meson Decays
• First search for $K_L\to {\pi }^0{\pi }^0\nu \bar{\nu }$
• Searches for the light invisible axion-like particle in $K^{+}\to {\pi }^{+}{\pi }^{0}a$ decay
• The Forward Physics Facility at the High-Luminosity LHC
• New Physics Searches at Kaon and Hyperon Factories