D0 - Particle Data Group

Review of Particle Physics: C. Caso et al. (Particle Data Group), European Physical Journal C3, 1 (1998)
Γ K 0
anything +Γ KK 0
Γ K 0
anything +Γ KK 0
anything anything /Γtotal /Γtotal /Γtotal /Γtotal
Γ4/Γ
VALUE EVTS DOCUMENT ID TECN COMMENT
0.42 ±0.05 ±0.05 OUR AVERAGE
0.455±0.050±0.032 COFFMAN 91 MRK3 e + e− 3.77 GeV
0.29 ±0.11 13 SCHINDLER 81 MRK2 e + e− 3.771 GeV
0.57 ±0.26 6 VUILLEMIN 78 MRK1 e + e− 3.772 GeV
Γ K + anything Γ /Γtotal
K + anything Γ /Γtotal
K + anything Γ /Γtotal
K + anything /Γtotal
VALUE EVTS DOCUMENT ID TECN COMMENT
0.034 +0.006
−0.004
OUR AVERAGE
0.034+0.006
−0.004
OUR AVERAGE
0.034+0.006
−0.004
OUR AVERAGE
0.034+0.006
−0.004
OUR AVERAGE
0.034 +0.007
−0.005
15 BARLAG 92C ACCM π− Cu 230 GeV
0.028±0.009±0.004 COFFMAN 91 MRK3 e + e− 3.77 GeV
0.03 +0.05
−0.02
AGUILAR-... 87E HYBR π p, pp 360, 400 GeV
0.08 ±0.03 25 SCHINDLER 81 MRK2 e + e− 3.771 GeV
15 BARLAG 92C computes the branching fraction using topological normalization.
Γ5/Γ Γ5/Γ
Semileptonic Semileptonic modes
Γ K − ℓ +
Γ νℓ /Γtotal Γ7/Γ
K − ℓ +
Γ νℓ /Γtotal Γ7/Γ
K − ℓ +
Γ νℓ /Γtotal Γ7/Γ
K − ℓ +
νℓ /Γtotal Γ7/Γ
We average our K− e + νe and K− µ + ν µ branching fractions, after multiplying the
latter by a phase-space factor of 1.03 to be able to use it with the K− e + νe fraction.
Hence our ℓ + here is really an e + .
VALUE DOCUMENT ID COMMENT
0.0350±0.0017 OUR OUR AVERAGE Error includes scale factor of 1.3.
0.0366±0.0018 PDG 98 Our Γ(K− e + 0.0333±0.0018 PDG 98
νe )/Γtotal 1.03 × our Γ(K − µ + ν µ )/Γtotal Γ K − e +
Γ νe /Γtotal Γ8/Γ
K − e +
Γ νe /Γtotal Γ8/Γ
K − e +
Γ νe /Γtotal Γ8/Γ
K − e +
νe /Γtotal Γ8/Γ
VALUE EVTS DOCUMENT ID TECN COMMENT
0.0366±0.0018 OUR OUR FIT
0.034 0.034 ±0.005 ±0.005 ±0.004
±0.004 55 ADLER 89 MRK3 e + e− 3.77 GeV
Γ K − e +
νe /Γ K − π +
Γ K − e +
νe /Γ K − π +
Γ K − e +
νe /Γ K − π +
Γ K − e +
νe /Γ K − π +
Γ8/Γ19 Γ8/Γ19 Γ8/Γ19 Γ8/Γ19
VALUE EVTS DOCUMENT ID TECN COMMENT
0.95 ±0.04 ±0.04 OUR FIT
0.95 ±0.04 ±0.04 OUR AVERAGE
0.978±0.027±0.044 2510 16 BEAN 93C CLE2 e + e− ≈ Υ(4S)
0.90 ±0.06 ±0.06
0.91 ±0.07 ±0.11
584
250
17 CRAWFORD
18 ANJOS
91B CLEO
89F E691
e + e− ≈ 10.5 GeV
Photoproduction
16 BEAN 93C uses K− µ + νµ as well as K− e + νe events and makes a small phase-space
adjustment to the number of the µ + events to use them as e + events. A pole mass of
2.00 ± 0.12 ± 0.18 GeV/c2 is obtained from the q2 dependence of the decay rate.
17 CRAWFORD 91B uses K− e + νe and K− µ + ν µ candidates to measure a pole mass of
2.1 +0.4
−0.2 +0.3
−0.2 GeV/c2 from the q2 dependence of the decay rate.
18 ANJOS 89F measures a pole mass of 2.1
+0.4
−0.2 ± 0.2GeV/c2from the q2 dependence
of the decay rate.
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