Observation of the Decay $K^- \to \pi^- \mu^+ \mu^-$ and Measurements of the Branching Ratios for $K^{\pm} \to \pi^{\pm} \mu^+ \mu^-$ - INSPIRE

DataBETA

Observation of the Decay $K^- \to \pi^- \mu^+ \mu^-$ and Measurements of the Branching Ratios for $K^{\pm} \to \pi^{\pm} \mu^+ \mu^-$

HyperCP

Collaboration

•

H.K. Park
(
- Michigan U.
)

Oct, 2001

4 pages

Published in:

Phys.Rev.Lett. 88 (2002) 111801

e-Print:

hep-ex/0110033 [hep-ex]

DOI:

10.1103/PhysRevLett.88.111801

PDG:

{{\mathit K}^{+}}

\rightarrow

{{\mathit \pi}^{+}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}

Report number:

FERMILAB-PUB-01-320-E

Experiments:

FNAL-E-0871

View in:

reference search63 citations

Citations per year

Abstract: (arXiv)

Using data collected with the HyperCP (E871) spectrometer during the 1997 fixed-target run at Fermilab, we report the first observation of the decay K- -> pi- mu+ mu- and new measurements of the branching ratios for K+/- -> pi+/- mu+ mu- . By combining the branching ratios for the K+ and K- decays, we measure the ratio (K+/- -> pi+/- mu+ mu-)/(K+/- -> all) = (9.8 +/- 1.0 +/- 0.5)x10^(-8). The CP asymmetry between the K+ and K- decay modes = -0.02 +/- 0.11 +/- 0.04.

K+: secondary beam
K-: secondary beam
K: semileptonic decay
K: branching ratio
mass spectrum: (pi muon+ muon-)
mass spectrum: dimuon
magnetic spectrometer: experimental results
Batavia TEVATRON PS
K- --> pi- muon+ muon-
K+ --> pi+ muon+ muon-

References(10)

Figures(0)

K ---> pi Lepton+ Lepton- Decays in the Effective Chiral Lagrangian of the Standard Model

Gerhard Ecker
(
- Vienna U.
)
,
Antonio Pich
(
- Munich, Max Planck Inst.
)
,
Eduardo de Rafael
(
- Marseille, CPT
)

- Nucl.Phys.B 291 (1987) 692-719
•
DOI:
- 10.1016/0550-3213(87)90491-3

The Decays K ---> pi l+ l- beyond leading order in the chiral expansion

G. D'Ambrosio
(
- INFN, Naples and
- Naples U.
)
,
G. Ecker
(
- Vienna U.
)
,
G. Isidori
(
- Frascati
)
,
J. Portoles
(
- Valencia U.
)

- JHEP 08 (1998) 004
•
e-Print:
- hep-ph/9808289
•
DOI:
- 10.1088/1126-6708/1998/08/004

Radiative Kaon Decays and CP Violation in Chiral Perturbation Theory

Gerhard Ecker
(
- Vienna U.
)
,
A. Pich
(
- CERN
)
,
Eduardo de Rafael
(
- Boston U. and
- Marseille, CPT
)

- Nucl.Phys.B 303 (1988) 665-702
•
DOI:
- 10.1016/0550-3213(88)90425-7

Observation of the $K^{+} \rightarrow \pi^{+} e^{+} e^{-}$ decay

et al.

- Phys.Lett.B 56 (1975) 201
•
DOI:
- 10.1016/0370-2693(75)90303-2

Study of the decay K+ ---> pi+ e+ e-

et al.

- Phys.Rev.Lett. 68 (1992) 278-281
•
DOI:
- 10.1103/PhysRevLett.68.278

A New measurement of the properties of the rare decay K+ ---> pi+ e+ e-

E865

Collaboration

•

R. Appel
(
- Yale U. and
- Pittsburgh U.
)

et al.

- Phys.Rev.Lett. 83 (1999) 4482-4485
•
e-Print:
- hep-ex/9907045
•
DOI:
- 10.1103/PhysRevLett.83.4482

Review of particle physics. Particle Data Group

et al.

- Eur.Phys.J.C 15 (2000) 1-878

Observation of the decay K+ ---> pi+ mu+ mu-

E787

Collaboration

•

S. Adler
(
- Brookhaven
)

et al.

- Phys.Rev.Lett. 79 (1997) 4756-4759
•
e-Print:
- hep-ex/9708012
•
DOI:
- 10.1103/PhysRevLett.79.4756

A New measurement of the rare decay K+ ---> pi+ mu+ mu-

e865

Collaboration

•

H. Ma
(
- Brookhaven
)

et al.

- Phys.Rev.Lett. 84 (2000) 2580-2583
•
e-Print:
- hep-ex/9910047
•
DOI:
- 10.1103/PhysRevLett.84.2580

A high-throughput data acquisition system for the HyperCP experiment

et al.

- Nucl.Instrum.Meth.A 455 (2000) 424-432
•
DOI:
- 10.1016/S0168-9002(00)00509-X