Measurement of the polarization in the decays {ital B}{sub {ital d}}{r_arrow}{ital J}/{psi}{ital K}{sup *0} and {ital B}{sub {ital s}}{r_arrow}{ital J}/{psi}{phi}
This Letter reports on measurements of the longitudinal polarization fractions in the decays {ital B}{sub {ital d}}{r_arrow}{ital J}/{psi}{ital K}{sup *0} and {ital B}{sub {ital s}}{r_arrow}{ital J}/{psi}{phi} using data collected with the Collider Detector at Fermilab. {ital B}{sub {ital d}} mesons are reconstructed through the decay chain {ital B}{sub {ital d}}{r_arrow}{ital J}/{psi}{ital K}*, {ital J}/{psi}{r_arrow}{mu}{sup +}{mu}{sup {minus}}, {ital K}{sup *0}{r_arrow}{ital K}{sup +}{pi}{sup {minus}}. A sample of 65{plus_minus}10{ital B}{sub {ital d}} events is used to obtain a longitudinal polarization fraction of {Gamma}{sub {ital L}}/{Gamma}=0.65{plus_minus}0.10(stat){plus_minus}0.04(syst). {ital B}{sub {ital s}} mesons are reconstructed through the decay chain {ital B}{sub {ital s}}{r_arrow}{ital J}/{psi}{phi}, {ital J}/{psi}{r_arrow}{mu}{sup +}{mu}{sup {minus}}, {phi}{r_arrow}{ital K}{sup +}{ital K}{sup {minus}}. A sample of 19{plus_minus}5{ital B}{sub {ital s}} events is used to obtain the result {Gamma}{sub {ital L}}/{Gamma}=0.56{plus_minus}0.21(stat){sub {minus}0.04}{sup +0.02}(syst). Copyright {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.
- OSTI ID:
- 124814
- Journal Information:
- Physical Review Letters, Vol. 75, Issue 17; Other Information: PBD: 23 Oct 1995
- Country of Publication:
- United States
- Language:
- English
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