CP violation in the decays B sup 0 yields. Psi. K sub s and B sup 0 yields. pi. sup +. pi. sup minus : A probe for new physics

doi:10.2172/7001960

Abstract

We point out the strong correlation between the CP-violating asymmetries in the decays B{sup o} {yields} {Psi}K{sub s} and B{sup o} {yields} {pi}{sup +}{pi}{sup {minus}} that is predicted by the Kobayashi-Maskawa model. This results in a very restricted allowed region for the asymmetries, and so their measurement will provide a powerful test of the standard model. To show how new physics may give very different results, we look at the predictions of a simple model where both the standard model and superweak contributions to the K{sup o} and B{sup o} mass matrices coexist. We find that, for possible values of the parameters, practically any values are allowed for the asymmetries.

CP violation in the decays B{sup 0} {yields} {Psi}K{sub s} and B{sup 0} {yields} {pi}{sup +}{pi}{sup {minus}}: A probe for new physics

Soares, J.M. ; Wolfenstein, L. May 1992

We point out the strong correlation between the CP-violating asymmetries in the decays B{sup o} {yields} {Psi}K{sub s} and B{sup o} {yields} {pi}{sup +}{pi}{sup {minus}} that is predicted by the Kobayashi-Maskawa model. This results in a very restricted allowed region for the asymmetries, and so their measurement will provide a powerful test of the standard model. To show how new physics may give very different results, we look at the predictions of a simple model where both the standard model and superweak contributions to the K{sup o} and B{sup o} mass matrices coexist. We find that, for possible values ofmore »« less
DOI: 10.2172/10187898

Full Text Available
[ital CP] violation in the decays [ital B][sup 0][r arrow][Psi][ital K][sub [ital S]] and [ital B][sup 0][r arrow][pi][sup +][pi][sup [minus]]: A probe for new physics

Soares, J.M. ; Wolfenstein, L. February 1993 - Physical Review, D (Particles Fields); (United States)

We point out the strong correlation between the [ital CP]-violating asymmetries in the decays [ital B][sup 0][r arrow][Psi][ital K][sub [ital s]] and [ital B][sup 0][r arrow][pi][sup +][pi][sup [minus]] that is predicted by the Kobayashi-Maskawa model. This results in a very restricted allowed region for the asymmetries, and so their measurement will provide a powerful test of the standard model. To show how new physics may give very different results, we look at the predictions of a simple model where both the standard model and superweak contributions to the [ital K][sup 0] and [ital B][sup 0] mass matrices coexist. We findmore »« less
DOI: 10.1103/PhysRevD.47.1021
Observation of Time-Dependent CP Violation in B{sup 0}{yields}{eta}{sup '}K{sup 0} Decays and Improved Measurements of CP Asymmetries in B{sup 0}{yields}{phi}K{sup 0}, K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} and B{sup 0}{yields}J/{psi}K{sup 0} Decays

Chen, K.-F. ; Chang, P. ; Chao, Y. ; ... January 2007 - Physical Review Letters

We present improved measurements of CP-violation parameters in B{sup 0}{yields}{phi}K{sup 0}, {eta}{sup '}K{sup 0}, K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} decays based on a sample of 535x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB energy-asymmetric e{sup +}e{sup -} collider. We obtain sin2{phi}{sub 1}{sup eff}=+0.64{+-}0.10(stat){+-}0.04(syst) for B{sup 0}{yields}{eta}{sup '}K{sup 0}, +0.50{+-}0.21(stat){+-}0.06(syst) for B{sup 0}{yields}{phi}K{sup 0}, and +0.30{+-}0.32(stat){+-}0.08(syst) for B{sup 0}{yields}K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} decays. We have observed CP violation in the B{sup 0}{yields}{eta}{sup '}K{sup 0} decay with a significance of 5.6 standard deviations. We also perform an improved measurementmore »« less
DOI: 10.1103/PHYSREVLETT.98.031802
Measurements of time-dependent CP violation in B{sup 0}{yields}{omega}K{sub S}{sup 0}, f{sub 0}(980)K{sub S}{sup 0}, K{sub S}{sup 0}{pi}{sup 0} and K{sup +}K{sup -}K{sub S}{sup 0} decays

Chao, Y. ; Chen, K.-F. ; Chang, P. ; ... November 2007 - Physical Review. D, Particles Fields

We present measurements of time-dependent CP asymmetries in B{sup 0}{yields}{omega}K{sub S}{sup 0}, f{sub 0}(980)K{sub S}{sup 0}, K{sub S}{sup 0}{pi}{sup 0} and K{sup +}K{sup -}K{sub S}{sup 0} decays based on a sample of 535x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB energy-asymmetric e{sup +}e{sup -} collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the decay modes are obtained from the asymmetries in the distributions of the proper-timemore » intervals between the two B decays.« less
DOI: 10.1103/PHYSREVD.76.091103
On Possibility of an Experimental Test of CP-Invariance in K$sup 0$ SUB S $Yields$ 3$pi$ Decays in Correlation Experiments With K$sup 0$anti K$sup 0$ Paris; EKSPERIMENTAL'NYE VOZMOZHNOSTI PROVERKI CP-INVARIANTNOSTI V RASPADAKH K$sup 0$ SUB S $Yields$ 3$pi$ V DORRELYATSIONNYKH OPYTAKH S PARAMI K$sup 0$anti K$sup 0$

Lukstyn'sh, Yu. ; Okonov, E. January 1966

Title: CP violation in the decays B sup 0 yields. Psi. K sub s and B sup 0 yields. pi. sup +. pi. sup minus : A probe for new physics

Abstract

Citation Formats

CP violation in the decays B{sup 0} {yields} {Psi}K{sub s} and B{sup 0} {yields} {pi}{sup +}{pi}{sup {minus}}: A probe for new physics

[ital CP] violation in the decays [ital B][sup 0][r arrow][Psi][ital K][sub [ital S]] and [ital B][sup 0][r arrow][pi][sup +][pi][sup [minus]]: A probe for new physics

Observation of Time-Dependent CP Violation in B{sup 0}{yields}{eta}{sup '}K{sup 0} Decays and Improved Measurements of CP Asymmetries in B{sup 0}{yields}{phi}K{sup 0}, K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} and B{sup 0}{yields}J/{psi}K{sup 0} Decays

Measurements of time-dependent CP violation in B{sup 0}{yields}{omega}K{sub S}{sup 0}, f{sub 0}(980)K{sub S}{sup 0}, K{sub S}{sup 0}{pi}{sup 0} and K{sup +}K{sup -}K{sub S}{sup 0} decays