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

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Unformatted text preview: Citation: K. Nakamura et al. (Particle Data Group), JP G 37 , 075021 (2010) (URL: http://pdg.lbl.gov) N BARYONS N BARYONS N BARYONS N BARYONS ( S = 0, I = 1/2) ( S = 0, I = 1/2) ( S = 0, I = 1/2) ( S = 0, I = 1/2) p , N + = uud ; n , N = udd p I ( J P ) = 1 2 ( 1 2 + ) Mass m = 1 . 00727646677 . 00000000010 u Mass m = 938 . 272013 . 000023 MeV [ a ] m p m p / m p < 2 10 9 , CL = 90% [ b ] q p m p /( q p m p ) = 0 . 99999999991 . 00000000009 q p + q p / e < 2 10 9 , CL = 90% [ b ] q p + q e / e < 1 . 10 21 [ c ] Magnetic moment = 2 . 792847356 . 000000023 N ( p + p ) p = ( . 1 2 . 1) 10 3 Electric dipole moment d < . 54 10 23 e cm Electric polarizability = (12 . . 6) 10 4 fm 3 Magnetic polarizability = (1 . 9 . 5) 10 4 fm 3 Charge radius = 0 . 877 . 007 fm Mean life > 2 . 1 10 29 years, CL = 90% [ d ] ( p invisible mode) Mean life > 10 31 to 10 33 years [ d ] (mode dependent) See the Note on Nucleon Decay in our 1994 edition (Phys. Rev. D50 D50 D50 D50, 1173) for a short review. The partial mean life limits tabulated here are the limits on /B i , where is the total mean life and B i is the branching fraction for the mode in question. For N decays, p and n indicate proton and neutron partial lifetimes. Partial mean life p p DECAY MODES p DECAY MODES p DECAY MODES p DECAY MODES (10 30 years) Confidence level (MeV/ c ) Antilepton + meson Antilepton + meson Antilepton + meson Antilepton + meson N e + > 158 ( n ), > 8200 ( p ) 90% 459 N + > 100 ( n ), > 6600 ( p ) 90% 453 N > 112 ( n ), > 25 ( p ) 90% 459 p e + > 313 90% 309 p + > 126 90% 297 n > 158 90% 310 N e + > 217 ( n ), > 75 ( p ) 90% 149 N + > 228 ( n ), > 110 ( p ) 90% 113 N > 19 ( n ), > 162 ( p ) 90% 149 p e + > 107 90% 143 HTTP://PDG.LBL.GOV Page 1 Created: 10/26/2010 11:51 Citation: K. Nakamura et al. (Particle Data Group), JP G 37 , 075021 (2010) (URL: http://pdg.lbl.gov) p + > 117 90% 105 n > 108 90% 144 N e + K > 17 ( n ), > 150 ( p ) 90% 339 p e + K S > 120 90% 337 p e + K L > 51 90% 337 N + K > 26 ( n ), > 120 ( p ) 90% 329 p + K S > 150 90% 326 p + K L > 83 90% 326 N K > 86 ( n ), > 670 ( p ) 90% 339 n K S > 51 90% 338 p e + K (892) > 84 90% 45 N K (892) > 78 ( n ), > 51 ( p ) 90% 45 Antilepton + mesons Antilepton + mesons Antilepton + mesons Antilepton + mesons p e + + > 82 90% 448 p e + > 147 90% 449 n e + > 52 90% 449 p + + > 133 90% 425 p + > 101 90% 427 n + > 74 90% 427 n e + K > 18 90% 319 Lepton + meson Lepton + meson Lepton + meson Lepton + meson n e + > 65 90% 459 n + > 49 90% 453 n e + > 62 90%...
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rpp2010-sum-baryons - Citation: K. Nakamura et al....

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