Measurement of the Decay Rate of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mo>→</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mo>+</mml:mo><mml:mrow><mml:msup><mml:mr

Cronin, J. W.; Kunz, P.; Risk, Winthrop S.; Wheeler, Paul C.

doi:10.1103/physrevlett.18.25

Cited by 100 publications

(20 citation statements)

References 9 publications

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“…The first attempt to look for a possible K®->TT 0 VV signal was made by , who analyzed the data originally taken for measurement of the K^->7r°7r° branching fraction (Cronin et al, 1967;Wheeler, 1968). In that experiment, the 2ir° mode was identified by the presence of photons with energy in the K® rest frame greater than the kinematical limit for photons from the 3TT° final state (i£ max = 165 MeV), but incompatible with Kl->2y decay (J?…”

Section: Experimental Situationmentioning

confidence: 99%

“…In the original Princeton experiment, 156 events were observed with a photon in the accepted energy range. If one subtracts the expected contribution from 27r° decay as well as the calculated backgrounds (Cronin et al, 1967;Wheeler, 1968) and normalizes to the K®->37r° decays, then one obtains a 90% confidence-level upper limit of BiK^->7r°vv) <7.6X10" 3 .…”

Section: Experimental Situationmentioning

confidence: 99%

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RareKdecays

Ritchie

Wojcicki

1993

Rev. Mod. Phys.

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This article reviews the current situation in the field of rare K decays: the relevant phenomenology, the present experimental situation, and prospects for the near future. Study of rare K decays can make a significant contribution in a number of different frontier areas of research in high-energy physics. In the area of CP violation, study of such rare decays as Kl-+Tr°e + e~, K®-• 7r°/z + jL4~, K^-^rfivv, and muon polarization in K®->/j,~hfi~ can provide important complementary information to what has been learned from the decay K^-^rnr.Even though experiments with sufficient accuracy to make a meaningful study of CP violation are still a few years away, significant progress has been made in this general area during the last decade. A second major area of interest in the field of rare K decays is the search for processes forbidden in the Standard Model, e.g., K® -+fie and K + ->TT + pi + e~.Various extensions of the Standard Model predict that these processes will occur with branching fractions in the range of 10~1 0 to 10~1 5 . Experiments of the last decade have pushed the limits into the 10 -10 to 10 -11 range, and further improvements in sensitivity of one to two orders of magnitude can be expected in the next few years. K decays allow one also to study higher-order weak-interaction processes such as A^J-•^+/z~~, K®->e + e~, K + ->7r + vv, which are forbidden to first order in the Standard Model. Because of strong suppression, these decay modes offer potential windows on new physics; in addition, they may offer the most reliable measurement of V td , one of the elements of the weak mixing matrix in the quark sector. The studies of the I*I + JJ>~ channel have achieved data samples of close to 1000 events; the other two modes should be observed for the first time in the next few years. Finally, as a byproduct of these studies, one has been able to look simultaneously for new light particles into which the K meson could decay. Limits obtained for various hypothetical particles are summarized. CONTENTS

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Section: Experimental Situationmentioning

confidence: 99%

Section: Experimental Situationmentioning

confidence: 99%

RareKdecays

Ritchie

Wojcicki

1993

Rev. Mod. Phys.

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“…The events of this reaction are fully measured and reconstructed in space using specially designed stereo-projectors similar to those proposed in [6]. Of the 25000…”

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confidence: 99%

Observation of a baryon resonance with positive strangeness in K + collisions with Xe nuclei

et al. 2003

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“…Assuming that CPT invariance is valid in general, then time reversal invariance must also be violated in the ~ decay. Recently the decay of ~ into 2~0 was obse·rved (Gaillard, et al, 1967;and Cronin, et al, 1967). These experiments independently demonstrate violation of CP invariance.…”

Section: Disclaimermentioning

confidence: 90%

Test of detailed balance in the reaction <sup>16</sup>O(d, α)<sup>14</sup>N and its inverse

Thornton

1967

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Measurement of the Decay Rate ofK20→π0+

Cited by 100 publications

References 9 publications

RareKdecays

RareKdecays

Observation of a baryon resonance with positive strangeness in K + collisions with Xe nuclei

Test of detailed balance in the reaction <sup>16</sup>O(d, α)<sup>14</sup>N and its inverse

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