rpp2010-sum-leptons - Citation: K. Nakamura et al....

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Citation: K. Nakamura et al. (Particle Data Group), JPG 37 , 075021 (2010) (URL: http://pdg.lbl.gov) LEPTONS e J = 1 2 Mass m = (548 . 57990943 ± 0 . 00000023) × 10 6 u Mass m =0 . 510998910 ± 0 . 000000013 MeV ¯ ¯ m e + m e ¯ ¯ / m < 8 × 10 9 , CL = 90% ¯ ¯ q e + + q e ¯ ¯ ± e < 4 × 10 8 Magnetic moment anomaly ( g 2)/2 = (1159 . 65218073 ± 0 . 00000028) × 10 6 ( g e + g e )/ g average =( 0 . 5 ± 2 . 1) × 10 12 Electric dipole moment d =(0 . 07 ± 0 . 07) × 10 26 e cm Mean life τ> 4 . 6 × 10 26 yr, CL = 90% [ a ] μ J = 1 2 Mass m . 1134289256 ± 0 . 0000000029 u Mass m = 105 . 658367 ± 0 . 000004 MeV Mean life τ =(2 . 197034 ± 0 . 000021) × 10 6 s (S = 1.2) τ μ + / τ μ =1 . 00002 ± 0 . 00008 c τ = 658 . 654 m Magnetic moment anomaly ( g 2)/2 = (11659209 ± 6) × 10 10 ( g μ + g μ g average 0 . 11 ± 0 . 12) × 10 8 Electric dipole moment d 0 . 1 ± 0 . 9) × 10 19 e cm Decay parameters Decay parameters Decay parameters Decay parameters [ b ] ρ . 7503 ± 0 . 0004 η . 057 ± 0 . 034 δ . 7504 ± 0 . 0006 ξ P μ . 0007 ± 0 . 0035 [ c ] ξ P μ δ / ρ> 0 . 99682, CL = 90% [ c ] ξ ± . 00 ± 0 . 04 ξ ±± . 7 ± 0 . 4 α /A = (0 ± 4) × 10 3 α ± /A = ( 10 ± 20) × 10 3 β /A = (4 ± 6) × 10 3 β ± /A = (2 ± 7) × 10 3 η . 02 ± 0 . 08 HTTP://PDG.LBL.GOV Page 1 Created: 7/30/2010 16:19
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Citation: K. Nakamura et al. (Particle Data Group), JPG 37 , 075021 (2010) (URL: http://pdg.lbl.gov) μ + modes are charge conjugates of the modes below. p μ DECAY MODES μ DECAY MODES μ DECAY MODES μ DECAY MODES Fraction (Γ i /Γ) Con±dence level (MeV/ c ) e ν e ν μ 100% 53 e ν e ν μ γ [ d ]( 1 . 4 ± 0 . 4) % 53 e ν e ν μ e + e [ e 3 . 4 ± 0 . 4) × 10 5 53 Lepton Family number ( LF ) violating modes Lepton Family number ( LF ) violating modes LF LF e ν e ν μ LF [ f ] < 1 . 2 % 90% 53 e γ LF < 1 . 2 × 10 11 90% 53 e e + e LF < 1 . 0 × 10 12 90% 53 e 2 γ LF < 7 . 2 × 10 11 90% 53 τ J = 1 2 Mass m = 1776 . 82 ± 0 . 16 MeV ( m τ + m τ )/ m average < 2 . 8 × 10 4 , CL = 90% Mean life τ = (290 . 6 ± 1 . 0) × 10 15 s c τ =87 . 11 μ m Magnetic moment anomaly > 0 . 052 and < 0 . 013, CL = 95% Re( d τ )= 0 . 22 to 0 . 45 × 10 16 e cm, CL = 95% Im( d τ 0 . 25 to 0 . 008 × 10 16 e cm, CL = 95% Weak dipole moment Weak dipole moment Weak dipole moment Weak dipole moment Re( d w τ ) < 0 . 50 × 10 17 e cm, CL = 95% Im( d w τ ) < 1 . 1 × 10 17 e cm, CL = 95% Weak anomalous magnetic dipole moment Weak anomalous magnetic dipole moment Weak anomalous magnetic dipole moment Weak anomalous magnetic dipole moment Re( α w τ ) < 1 . 1 × 10 3 , CL = 95% Im( α w τ ) < 2 . 7 × 10 3 , CL = 95% Decay parameters Decay parameters See the τ Particle Listings for a note concerning τ -decay parameters. ρ ( e or μ )=0 . 745 ± 0 . 008 ρ ( e . 747 ± 0 . 010 ρ ( μ . 763 ± 0 . 020 ξ ( e μ . 985 ± 0 . 030 ξ ( e . 994 ± 0 . 040 ξ ( μ )=1 . 030 ± 0 . 059 η ( e μ . 013 ± 0 . 020 η ( μ . 094 ± 0 . 073 ( δξ )( e μ . 746 ± 0 . 021 ( )( e . 734 ± 0 . 028 HTTP://PDG.LBL.GOV Page 2 Created: 7/30/2010 16:19
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Citation: K. Nakamura et al. (Particle Data Group), JPG 37 , 075021 (2010) (URL: http://pdg.lbl.gov) ( δξ )( μ )=0 . 778 ± 0 . 037 ξ ( π . 993 ± 0 . 022 ξ ( ρ . 994 ± 0 . 008 ξ ( a 1 )=1 . 001 ± 0 . 027 ξ (all hadronic modes) = 0 . 995 ± 0 . 007 τ + modes are charge conjugates of the modes below. “ h ± ” stands for π ± or K ± .“ ± ” stands for e μ . “Neutrals” stands for γ ’s and/or π 0 ’s.
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This note was uploaded on 06/07/2011 for the course PHYS 4132 taught by Professor Kutter during the Spring '11 term at University of Florida.

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rpp2010-sum-leptons - Citation: K. Nakamura et al....

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