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Title: Sgoldstino interpretation of HyperCP events

Abstract

We discuss possible sgoldstino interpretation of the observation, reported by HyperCP collaboration, of three {sigma}{sup +}{yields}p{mu}{sup +}{mu}{sup -} decay events with dimuon invariant mass 214.3 MeV within detector resolution. We find that this interpretation is consistent in models with (i) parity conservation in sgoldstino interactions, (ii) pseudoscalar sgoldstino P of mass 214 MeV and heavier scalar sgoldstino, and (iii) low supersymmetry breaking scale, {radical}(F)=2.5-60 TeV. In these models, sgoldstino can be observed in decays K{sup +}{yields}{pi}{sup +}{pi}{sup 0}P, K{sub L}{yields}{pi}{pi}P and K{sub S}{yields}{pi}{pi}P at the branching ratios of at least of order 10{sup -12}, 10{sup -8} and 10{sup -11}, respectively. The model can be probed also at e{sup +}e{sup -} colliders in the channels e{sup +}e{sup -}{yields}{gamma}P and e{sup +}e{sup -}{yields}e{sup +}e{sup -}P, where the cross section is likely to be in the range 1 pb-5 ab.

Authors:
;  [1]
  1. Institute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary prospect 7a, Moscow 117312 (Russian Federation)
Publication Date:
OSTI Identifier:
20776681
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.73.035002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; KAONS NEUTRAL LONG-LIVED; KAONS NEUTRAL SHORT-LIVED; KAONS PLUS; MEV RANGE; MUONS MINUS; MUONS PLUS; PARITY; PARTICLE DECAY; POSITRONS; REST MASS; SCALARS; SIGMA PLUS PARTICLES; SYMMETRY BREAKING; TEV RANGE

Citation Formats

Gorbunov, D.S., and Rubakov, V.A.. Sgoldstino interpretation of HyperCP events. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.73.035002.
Gorbunov, D.S., & Rubakov, V.A.. Sgoldstino interpretation of HyperCP events. United States. doi:10.1103/PhysRevD.73.035002.
Gorbunov, D.S., and Rubakov, V.A.. Wed . "Sgoldstino interpretation of HyperCP events". United States. doi:10.1103/PhysRevD.73.035002.
@article{osti_20776681,
title = {Sgoldstino interpretation of HyperCP events},
author = {Gorbunov, D.S. and Rubakov, V.A.},
abstractNote = {We discuss possible sgoldstino interpretation of the observation, reported by HyperCP collaboration, of three {sigma}{sup +}{yields}p{mu}{sup +}{mu}{sup -} decay events with dimuon invariant mass 214.3 MeV within detector resolution. We find that this interpretation is consistent in models with (i) parity conservation in sgoldstino interactions, (ii) pseudoscalar sgoldstino P of mass 214 MeV and heavier scalar sgoldstino, and (iii) low supersymmetry breaking scale, {radical}(F)=2.5-60 TeV. In these models, sgoldstino can be observed in decays K{sup +}{yields}{pi}{sup +}{pi}{sup 0}P, K{sub L}{yields}{pi}{pi}P and K{sub S}{yields}{pi}{pi}P at the branching ratios of at least of order 10{sup -12}, 10{sup -8} and 10{sup -11}, respectively. The model can be probed also at e{sup +}e{sup -} colliders in the channels e{sup +}e{sup -}{yields}{gamma}P and e{sup +}e{sup -}{yields}e{sup +}e{sup -}P, where the cross section is likely to be in the range 1 pb-5 ab.},
doi = {10.1103/PhysRevD.73.035002},
journal = {Physical Review. D, Particles Fields},
number = 3,
volume = 73,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2006},
month = {Wed Feb 01 00:00:00 EST 2006}
}
  • Preliminary results are presented on the operational aspects of an iron-scintillator sampling hadronic calorimeter used in the HyperCP experiment at Fermilab during the 1996-1997 fixed target run. The calorimeter used wavelength shifter fibers for light collection from scintillator sheets. Details of how the 2 m{times}2 mm fibers were polished, sputtered, and used for the readout are discussed. The average reflectivity of the sputtered fibers was 0.85{plus_minus}0.05, and the average attenuation lengths were 3.48{plus_minus}0.34 m. The calorimeter was designed to trigger on the proton (anti-proton) from {Lambda}({bar {Lambda}}) decays, suppressing triggers from secondary interactions and background muons. {copyright} {ital 1998 Americanmore » Institute of Physics.}« less
  • No abstract prepared.
  • The HyperCP (E871) experiment collected {approx} 1010 hyperon decays, including {approx} 107 Omega decays. A signal of 134 events has been observed in the rare decay mode {omega}- {yields} {xi}-{pi}+{pi}-. We present preliminary results on the contribution of {omega}- {yields} {xi}{sub 1530}*{sup 0} {pi}{sup -} to this process.
  • The HyperCP Collaboration has observed three events for the decay {sigma}{sup +}{yields}p{mu}{sup +}{mu}{sup -} which may be interpreted as a new particle of mass 214.3 MeV. However, existing data from kaon and B-meson decays provide stringent constraints on the construction of models that support this interpretation. In this Letter we show that the ''HyperCP particle'' can be identified with the light pseudoscalar Higgs boson in the next-to-minimal supersymmetric standard model, the A{sub 1}{sup 0}. In this model there are regions of parameter space where the A{sub 1}{sup 0} can satisfy all the existing constraints from kaon and B-meson decays andmore » mediate {sigma}{sup +}{yields}p{mu}{sup +}{mu}{sup -} at a level consistent with the HyperCP observation.« less
  • HyperCP is an experiment that collected data during the 1997 and 1999 fixed-target runs at Fermilab. We used an 800 GeV/c proton beam to create a secondary beam of charged hyperons and kaons. The primary goal of the experiment was to conduct a sensitive search for CP violation in hyperon decay; however, we also performed a number of searches for rare and forbidden decays. One such result is evidence for the second-order weak decay {sigma}+ to a proton and a pair of muons.