Search for the Decay<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:mi>S</mml:mi></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>μ</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>μ</mml:mi></mml:mro

The decay modes -+ pip-and K 3 -+ p+p-are discussed within the framework of first-order weak combined with fourth-order electromagnetic interactions. The possibility of obtaining lower bounds to the corresponding decay rates is examined, and estimates of the lower bounds are given in a perturbation-theory model. Possible enhancement effects due to strong interactions have been estimated through a simple model of final-state interactions. The assumption of CP invariance is made throughout.Goldberger, K. hl. Kroll, and F. E. Low, Phys. Rev. 179, 1518 11 060) \-,-,,. 6 A. Pais and S. B. Treiman, Phys. Rev. 176, 1974 (1968).T o r a model of violation of C P invariance in which the decay K s -+ p+p-plays an important role, see M. L. Good, L. Michel, and E. de Rafael, Phys.

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Comments on the Unitarity Bound inKL0→μ+μ−
Chen
¹
,
Kawarabayashi
²
,
Shaw
³

1971
Phys. Rev. D
5
0
0
0
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I6we use fK/fn. =1.28, fn =0.95rn,, and sinB=0.22. The range quoted in the result (19) corresponds to 0 2 6 2 -i . There a r e some papers which suggest 6 = 0. See, for instance, J. Schwinger, Phys, Letters E , 473 (1967): Riazuddin and Fayyazuddin, Nuovo Cimento 45, 520 (1968); V. S. Mathur and R . N. hlohapatra, Phys.Rev. 173, 1668 (1968).':obtained from the experimental value of the rate. "J. J. Sakurai, Phys. Rev. 156, 1508(1967.Two alternatives to reconcile the present disagreement between experiment and the "simple" unitarity bound in K ! -p+p-a r e considered. These alternatives presume that C P violation does not play the dominant role (via Ret) in the resolution of this puzzle. They a r e (1) the introduction of new muonic interactions, and (2) the existence of a new pseudoscalar meson. The first alternative can already be eliminated by present experimental evidence. The second alternative must satisfy a number of restrictions.Recently, the r e s u l t of a n e x p e r i m e n t a l s e a r c h f o r the d e c a y w a s r e p o r t e d by C l a r k ct al.' They o b s e r v e d n o c l e a r evidence f o r r e a c t i o n ( I ) , and s e t a n u p p e r bound to t h i s branching r a t i o . I t is

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Search for the DecayKS0→μ+μ

Abstract: A search for the decay Ks° -> M" 1 /*has been completed at the Argonne zero-gradient synchrotron. No event has been found. The upper limit for the branching ratio is V (Ks° -» n + if)/T (Ks° -»all decays) <9.7X10~5.

Cited by 5 publications

References 11 publications

Weak charge-retention processes andCP-nonconservation

Weak charge-retention processes andCP-nonconservation

Neutral Kaon Decays into Lepton Pairs

Comments on the Unitarity Bound inKL0→μ+μ−
Chen
¹
,
Kawarabayashi
²
,
Shaw
³

1971
Phys. Rev. D
5
0
0
0
View full text Add to dashboard Cite

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About

Search for the DecayKS0→μ+μ

Abstract: A search for the decay Ks° -> M" 1 /*has been completed at the Argonne zero-gradient synchrotron. No event has been found. The upper limit for the branching ratio is V (Ks° -» n + if)/T (Ks° -»all decays) <9.7X10~5.

Cited by 5 publications

References 11 publications

Weak charge-retention processes andCP-nonconservation

Weak charge-retention processes andCP-nonconservation

Neutral Kaon Decays into Lepton Pairs

Comments on the Unitarity Bound inKL0→μ+μ−Chen1, Kawarabayashi2, Shaw3 1971Phys. Rev. D5000View full textAdd to dashboardCite

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Product

Resources

About

Comments on the Unitarity Bound inKL0→μ+μ−
Chen
¹
,
Kawarabayashi
²
,
Shaw
³

1971
Phys. Rev. D
5
0
0
0
View full text Add to dashboard Cite