Determination of the K0(L) --> pi- mu+ Muon-neutrino Form-Factor xi (q**2) by Muon Polarization Measurements
Aug, 1976
77 pages
Published in:
- Phys.Rev.D 15 (1977) 553-573
Report number:
- LBL-4802-REV,
- LBL-4802
Citations per year
Abstract: (APS)
The polarization of the muon in the decay KL0→π−μ+νμ (Kμ3) was measured as a function of q2, the four-momentum transferred to the lepton pair, by using a precession polarimeter with a double-armed spectrometer at the Bevatron. A sample of 207 260 events collected with a vertical precession field was used to determine the Kμ3 form factor ξ(q2), assuming Imξ(q2) = 0.0. If one parametrizes the q2 dependence of ξ by ξ(q2) = ξ(0)+Λq2mπ2, then ξ(0) = 0.178±0.105−3.80Λ. A sample of 55 604 events collected with a horizontal precession field was used to determine Imξ(q2). If one assumes that Imξ(q2) has no dependence on q2, then Imξ(0) = 0.35±0.30+0.21Reξ(0).- K0: SEMILEPTONIC DECAY
- K0: K(L)
- PI-: FINAL STATE
- FINAL STATE: PI-
- MUON+: FINAL STATE
- FINAL STATE: MUON+
- NEUTRINO/MU/: FINAL STATE
- FINAL STATE: NEUTRINO/MU/
- KINEMATICS
- MUON: POLARIZATION
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