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TABLE 44.3 Some Hadrons and Their Properties Mass (MeV c?) Charge Ratio, Q.e Baryon Number, B Strangeness, S Mean Lifetime (s) Typical Decay Modes Quark Content Particle Spin Mesons 135.0 uũ, da ud 8.5 * 10-17 139.6 +1 2.60 * 10-8 2.60 * 10-8 1.24 * 10- 139.6 m n. ud K* 493.7 +1 m'n us K 493.7 -1 1.24 * 10-8 m n. h° 547.9 10-18 uū, dd, sĩ Вaryons 938.3 +1 1 Stable uud | 939.6 1 80 pe n. udd A° 1116 -1 2.63 * 10-10 pp" or np uds Σ' 1189 +1 -1 8.02 * 10-11 pp" or np A"g 1193 1 -1 7.4 * 10-20 uds 1197 -1 1 -1 1.48 * 10-10 np" dds 1315 1 -2 2.90 * 10-10 uss 1322 -2 1.64 * 10-10 A'p- dss A** 1232 +2 1 10-23 pp A'K- 1672 -1 1 -3 8.2 * 10-11 2286 +1 1 2.0 * 10-13 pKp* ude

TABLE 44.3 Some Hadrons and Their Properties Mass (MeV c?) Charge Ratio, Q.e Baryon Number, B Strangeness, S Mean Lifetime (s) Typical Decay Modes Quark Content Particle Spin Mesons 135.0 uũ, da ud 8.5 * 10-17 139.6 +1 2.60 * 10-8 2.60 * 10-8 1.24 * 10- 139.6 m n. ud K* 493.7 +1 m'n us K 493.7 -1 1.24 * 10-8 m n. h° 547.9 10-18 uū, dd, sĩ Вaryons 938.3 +1 1 Stable uud | 939.6 1 80 pe n. udd A° 1116 -1 2.63 * 10-10 pp" or np uds Σ' 1189 +1 -1 8.02 * 10-11 pp" or np A"g 1193 1 -1 7.4 * 10-20 uds 1197 -1 1 -1 1.48 * 10-10 np" dds 1315 1 -2 2.90 * 10-10 uss 1322 -2 1.64 * 10-10 A'p- dss A** 1232 +2 1 10-23 pp A'K- 1672 -1 1 -3 8.2 * 10-11 2286 +1 1 2.0 * 10-13 pKp* ude

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The decay products from the decay of short-lived unstable particles can provide evidence that these particles have been produced in a collision experiment. As an initial step in designing an experiment to detect short-lived hadrons, you make a literature study of their decays. Table gives experimental data for the mass and typical decay modes of the particles Σ-, Ξ0 , ∆++, and Ω-. (a) Which of these four particles has the largest mass? The smallest? (b) By the decay modes shown in the table, for which of these particles do the decay products have the greatest total kinetic energy? The least?

TABLE 44.3 Some Hadrons and Their Properties Mass (MeV c?) Charge Ratio, Q.e Baryon Number, B Strangeness, S Mean Lifetime (s) Typical Decay Modes Quark Content Particle Spin Mesons 135.0 uũ, da ud 8.5 * 10-17 139.6 +1 2.60 * 10-8 2.60 * 10-8 1.24 * 10- 139.6 m n. ud K* 493.7 +1 m'n us K 493.7 -1 1.24 * 10-8 m n. h° 547.9 10-18 uū, dd, sĩ Вaryons 938.3 +1 1 Stable uud | 939.6 1 80 pe n. udd A° 1116 -1 2.63 * 10-10 pp" or np uds Σ' 1189 +1 -1 8.02 * 10-11 pp" or np A"g 1193 1 -1 7.4 * 10-20 uds 1197 -1 1 -1 1.48 * 10-10 np" dds 1315 1 -2 2.90 * 10-10 uss 1322 -2 1.64 * 10-10 A'p- dss A** 1232 +2 1 10-23 pp A'K- 1672 -1 1 -3 8.2 * 10-11 2286 +1 1 2.0 * 10-13 pKp* ude
Transcribed Image Text:TABLE 44.3 Some Hadrons and Their Properties Mass (MeV c?) Charge Ratio, Q.e Baryon Number, B Strangeness, S Mean Lifetime (s) Typical Decay Modes Quark Content Particle Spin Mesons 135.0 uũ, da ud 8.5 * 10-17 139.6 +1 2.60 * 10-8 2.60 * 10-8 1.24 * 10- 139.6 m n. ud K* 493.7 +1 m'n us K 493.7 -1 1.24 * 10-8 m n. h° 547.9 10-18 uū, dd, sĩ Вaryons 938.3 +1 1 Stable uud | 939.6 1 80 pe n. udd A° 1116 -1 2.63 * 10-10 pp" or np uds Σ' 1189 +1 -1 8.02 * 10-11 pp" or np A"g 1193 1 -1 7.4 * 10-20 uds 1197 -1 1 -1 1.48 * 10-10 np" dds 1315 1 -2 2.90 * 10-10 uss 1322 -2 1.64 * 10-10 A'p- dss A** 1232 +2 1 10-23 pp A'K- 1672 -1 1 -3 8.2 * 10-11 2286 +1 1 2.0 * 10-13 pKp* ude
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