Knowledge (XXG)

Bottom quark

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specify the rates, where both these decays are suppressed, making lifetimes of most bottom particles (~10 s) somewhat longer than those of charmed particles (~10 s), but shorter than those of strange particles (from ~10 to ~10 s).
2452: 479:, but the bottom quark has exceptionally low rates of transition to lower-mass quarks. The bottom quark is also notable because it is a product in almost all 2202: 2440: 541:. It was reported at the time that DESY scientists were in favor of the name "beauty", while the American scientists tended towards "bottom". 1424: 1354: 1084: 1133:; Appel, J.; Brown, B.; Brown, C.; Innes, W.; Ueno, K.; Yamanouchi, T.; Ito, A.; Jöstlein, H.; Kaplan, D.; Kephart, R.; et al. (1977). 1482: 2338: 996: 634:
byproducts containing a bottom quark a distinctive signature that makes them relatively easy to identify using a technique called "
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containing the bottom quark are exceptionally long-lived for their mass, and are the easiest particles to use to investigate
2553: 439: 72: 533:. The discovery was confirmed about a year later by the PLUTO and DASP2 Collaborations at the electron-positron collider 2435: 534: 496: 163: 1373:. Proceedings of Twenty Beautiful Years of Bottom Physics. AIP Conference Proceedings. Vol. 424. pp. 29–42. 1346: 95: 1238: 1076: 209: 2511: 1923: 1451: 1249: 1325: 1741: 911: 2479: 2114: 1475: 1139: 472: 321: 82: 2414: 1751: 545: 476: 2501: 784: 1106: 1374: 1294: 1213: 1148: 1043: 953: 870: 518: 2516: 1499: 1404: 1285: 1262: 1003: 992: 435: 394: 374: 359: 336: 50: 43: 2528: 1315: 2459: 1468: 87: 551:
While the name "beauty" is sometimes used, "bottom" became the predominant usage by analogy of
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Arthur L. Robinson (1978). "Particle Physics: New Evidence from Germany for Fifth Quark".
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The Discovery of the b Quark at Fermilab in 1977: The Experiment Coordinator's Story
2469: 2019: 2009: 1999: 1760: 1711: 1653: 1530: 1320: 1135:"Observation of a Dimuon Resonance at 9.5 GeV in 400-GeV Proton-Nucleus Collisions" 1115: 688: 643: 578: 504: 330: 290: 227: 201: 130: 1225: 1070: 2484: 2252: 2155: 2150: 2067: 2062: 1992: 1946: 1903: 1868: 1827: 1719: 1683: 1545: 823: 751: 740: 601: 526: 508: 484: 248: 1188:
Proceedings of the 19th International Conference on High Energy Physics (Tokyo)
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The bottom quark was first described theoretically in 1973 by physicists
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have been observed, and are named in analogy with strange baryons (e.g.
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The combination of high mass and low transition rate gives experimental
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The evidence for the bottom quark was first obtained in 1977 by the
2378: 2318: 2170: 2029: 1908: 1848: 1803: 1696: 1674: 1517: 639: 589:, and many orders of magnitude larger than common "light" quarks. 572: 443: 65: 1416: 2145: 2077: 2037: 1613: 1608: 655: 538: 530: 1464: 1398: 857:"CP-Violation in the Renormalizable Theory of Weak Interaction" 1449:
History of the discovery of the bottom quark / Upsilon meson
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Herb, S. W.; Hom, D.; Lederman, L.; Sens, J.; Snyder, H.;
1263:"Transformation of Quark Flavors by the Weak Interaction" 912:"Discoveries at Fermilab – Discovery of the Bottom Quark" 787:. These consist of a bottom quark and its antiparticle. 592:
Although it almost exclusively transitions from or to a
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2008 Physics Nobel Prize lecture by Toshihide Maskawa
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2008 Physics Nobel Prize lecture by Makoto Kobayashi
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Harari, H. (1975). "A new quark model for hadrons".
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Department of Physics and Astronomy. 844: 548:for their explanation of CP-violation. 31: 1328:, Department of Physics and Astronomy 7: 850: 848: 855:Kobayashi, M.; Maskawa, T. (1973). 783:, the first particle discovered in 544:Kobayashi and Maskawa won the 2008 680:containing bottom quarks include: 25: 1307:10.1038/scientificamerican1078-72 2527: 2420:Timeline of particle discoveries 662:Hadrons containing bottom quarks 862:Progress of Theoretical Physics 687:contain a bottom quark (or its 1072:The Evidence for the Top Quark 1: 1226:10.1126/science.200.4345.1033 2436:History of subatomic physics 1056:10.1016/0370-2693(75)90072-6 942:"Review of Particle Physics" 1347:University of Chicago Press 2575: 1161:10.1103/PhysRevLett.39.252 1077:Cambridge University Press 967:10.1103/PhysRevD.98.030001 665: 2525: 2210: 2453:mathematical formulation 2048:Eta and eta prime mesons 1326:Georgia State University 1100:Lederman, L. M. (2005). 754:states, for example the 2115:Double-charm tetraquark 1184:"Particle Spectroscopy" 1140:Physical Review Letters 1102:"Logbook: Bottom Quark" 995:); et al. (2012). 473:electroweak interaction 1454:24 August 2017 at the 1069:Staley, K. W. (2004). 546:Nobel Prize in Physics 477:quantum chromodynamics 2512:Wave–particle duality 2502:Relativistic particle 1639:Electron antineutrino 1341:A. Pickering (1984). 529:decaying to pairs of 369:Weak hypercharge 2554:Elementary particles 1742:Faddeev–Popov ghosts 1492:Particles in physics 1349:. pp. 114–125. 638:". For that reason, 261:Electric charge 2517:Particle chauvinism 2460:Subatomic particles 1405:Syracuse University 1379:1998AIPC..424...29Y 1343:Constructing Quarks 1299:1978SciAm.239d..72L 1286:Scientific American 1218:1978Sci...200.1033R 1212:(4345): 1033–1034. 1153:1977PhRvL..39..252H 1114:(8). Archived from 1048:1975PhLB...57..265H 1004:Particle Data Group 993:Particle Data Group 958:2018PhRvD..98c0001T 875:1973PThPh..49..652K 571:The bottom quark's 436:elementary particle 44:elementary particle 34: 1261:Nave, C.R. (ed.). 1182:G. Flügge (1978). 1118:on 4 October 2006. 1079:. pp. 31–33. 884:10.1143/PTP.49.652 567:Distinct character 446:with a charge of − 135:bottom antiquark ( 2541: 2540: 2497:Massless particle 2305: 2304: 2301: 2300: 2266: 2265: 2129: 2128: 1941: 1940: 1937: 1936: 1889:Magnetic monopole 1837: 1836: 1728: 1727: 1669: 1668: 1649:Muon antineutrino 1634:Electron neutrino 1426:978-981-02-0708-3 1356:978-0-226-66799-7 1107:Symmetry Magazine 1086:978-0-521-82710-2 1035:Physics Letters B 946:Physical Review D 914:(Press release). 501:Toshihide Maskawa 420: 419: 331:Weak isospin 168:Toshihide Maskawa 16:(Redirected from 2566: 2531: 2507:Virtual particle 2278:Mesonic molecule 2212: 2208: 2053:Bottom eta meson 1961: 1952: 1924:W′ and Z′ bosons 1914:Sterile neutrino 1899:Majorana fermion 1766: 1757: 1680: 1659:Tau antineutrino 1514: 1505: 1485: 1478: 1471: 1462: 1438: 1409:World Scientific 1403:(2nd ed.). 1390: 1372: 1360: 1337: 1335: 1333: 1310: 1271: 1270: 1258: 1252: 1247: 1241: 1236: 1230: 1229: 1201: 1192: 1191: 1179: 1173: 1172: 1126: 1120: 1119: 1097: 1091: 1090: 1066: 1060: 1059: 1029: 1023: 1022: 1020: 1018: 1012: 1006:. Archived from 1001: 988: 982: 981: 979: 969: 937: 928: 927: 925: 923: 908: 899: 898: 896: 886: 852: 812: 811: 810: 802: 801: 772: 771: 770: 763: 762: 738: 737: 736: 728: 727: 719: 718: 717: 709: 708: 622: 615: 606:weak interaction 584: 555:and "bottom" to 523:Leon M. Lederman 497:Makoto Kobayashi 491:Name and history 461: 459: 458: 455: 452: 442:. It is a heavy 416: 415: 413: 412: 409: 406: 402: 392: 390: 389: 386: 383: 363: 357: 355: 354: 351: 348: 344: 319: 317: 316: 313: 310: 280: 278: 277: 274: 271: 244:Decays into 233: 225: 224: 212: 207: 199: 198: 179:Leon M. Lederman 164:Makoto Kobayashi 154: 153: 152: 146: 143: 142: 125: 124: 123: 116: 115: 35: 21: 2574: 2573: 2569: 2568: 2567: 2565: 2564: 2563: 2544: 2543: 2542: 2537: 2521: 2475:Nuclear physics 2424: 2388: 2324:Davydov soliton 2297: 2262: 2236: 2197: 2125: 2097: 2024: 1933: 1833: 1792: 1746: 1724: 1706: 1665: 1585: 1494: 1489: 1456:Wayback Machine 1445: 1427: 1393: 1387:10.1063/1.55114 1370: 1364:J. Yoh (1997). 1363: 1357: 1340: 1331: 1329: 1313: 1282: 1279: 1277:Further reading 1274: 1260: 1259: 1255: 1248: 1244: 1237: 1233: 1203: 1202: 1195: 1181: 1180: 1176: 1128: 1127: 1123: 1099: 1098: 1094: 1087: 1068: 1067: 1063: 1031: 1030: 1026: 1016: 1014: 1010: 999: 990: 989: 985: 939: 938: 931: 921: 919: 918:. 7 August 1977 910: 909: 902: 854: 853: 846: 842: 820: 809: 806: 805: 804: 800: 798: 797: 796: 795: 780: 769: 767: 766: 765: 761: 759: 758: 757: 756: 750:There are many 735: 732: 731: 730: 726: 724: 723: 722: 721: 716: 713: 712: 711: 707: 705: 704: 703: 702: 674: 668:list of baryons 666:Main articles: 664: 625: 620: 618: 613: 576: 569: 519:E288 experiment 493: 456: 453: 450: 449: 447: 410: 407: 404: 403: 400: 398: 387: 384: 381: 380: 378: 373: 352: 349: 346: 345: 342: 340: 335: 314: 311: 308: 307: 305: 275: 272: 269: 268: 266: 252: 222: 220: 219: 217: 216: 210: 196: 194: 193: 191: 151: 149: 148: 147: 144: 141: 139: 138: 137: 136: 122: 120: 119: 118: 114: 112: 111: 110: 109: 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1242: 1231: 1193: 1174: 1121: 1092: 1085: 1061: 1042:(3): 265–269. 1024: 1013:on 12 May 2013 983: 929: 900: 869:(2): 652–657. 843: 841: 838: 837: 836: 831: 826: 819: 816: 815: 814: 807: 799: 788: 778: 768: 760: 748: 733: 725: 714: 706: 700: 672:list of mesons 663: 660: 623: 616: 568: 565: 492: 489: 418: 417: 371: 365: 364: 333: 327: 326: 303: 297: 296: 293: 287: 286: 263: 257: 256: 246: 240: 239: 189: 183: 182: 176: 172: 171: 161: 157: 156: 150: 140: 133: 127: 126: 121: 113: 107: 103: 102: 85: 79: 78: 75: 69: 68: 63: 59: 58: 53: 47: 46: 41: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2571: 2560: 2557: 2555: 2552: 2551: 2549: 2536: 2535: 2530: 2524: 2518: 2515: 2513: 2510: 2508: 2505: 2503: 2500: 2498: 2495: 2493: 2492:Exotic matter 2490: 2486: 2483: 2482: 2481: 2480:Eightfold way 2478: 2476: 2473: 2471: 2470:Antiparticles 2468: 2466: 2463: 2461: 2458: 2454: 2451: 2450: 2449: 2446: 2442: 2439: 2438: 2437: 2434: 2433: 2431: 2427: 2421: 2418: 2416: 2413: 2411: 2408: 2406: 2403: 2401: 2398: 2397: 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Beringer ( 987: 984: 978: 977:10044/1/68623 973: 968: 963: 959: 955: 952:(3): 030001. 951: 947: 943: 936: 934: 930: 917: 913: 907: 905: 901: 895: 890: 885: 880: 876: 872: 868: 864: 863: 858: 851: 849: 845: 839: 835: 832: 830: 827: 825: 822: 821: 817: 793: 789: 786: 782: 774: 753: 749: 747:respectively. 746: 745:strange quark 742: 701: 698: 694: 690: 686: 683: 682: 681: 679: 673: 669: 661: 659: 658:experiments. 657: 653: 649: 645: 641: 637: 633: 628: 611: 607: 603: 599: 595: 590: 588: 583: 582: 574: 566: 564: 562: 558: 554: 549: 547: 542: 540: 536: 532: 528: 524: 520: 517: 512: 510: 506: 502: 498: 490: 488: 486: 482: 478: 474: 469: 467: 466: 445: 441: 438:of the third 437: 433: 429: 425: 396: 376: 372: 370: 366: 361: 338: 334: 332: 328: 325: 324: 304: 302: 298: 294: 292: 288: 285: 284: 264: 262: 258: 255: 250: 247: 245: 241: 237: 232: 231: 214: 206: 205: 190: 188: 184: 181:et al. (1977) 180: 177: 173: 169: 165: 162: 158: 134: 132: 128: 108: 104: 101: 97: 93: 89: 86: 84: 80: 76: 74: 70: 67: 64: 60: 57: 54: 52: 48: 45: 42: 40: 36: 30: 27:Type of quark 19: 2532: 2203:Hypothetical 2151:Exotic atoms 2020:Omega baryon 2010:Sigma baryon 2000:Delta baryon 1752:Hypothetical 1734:Ghost fields 1720:Higgs boson 1654:Tau neutrino 1575: 1546:Charm (quark 1417:10.1142/1441 1399: 1366: 1342: 1330:. Retrieved 1321:HyperPhysics 1319: 1293:(4): 72–81. 1290: 1284: 1267:HyperPhysics 1266: 1256: 1245: 1234: 1209: 1205: 1187: 1177: 1144: 1138: 1124: 1116:the original 1111: 1105: 1095: 1071: 1064: 1039: 1033: 1027: 1015:. Retrieved 1008:the original 986: 949: 945: 920:. Retrieved 866: 860: 689:antiparticle 676:Some of the 675: 644:CP violation 629: 591: 580: 570: 550: 543: 521:team led by 513: 505:CP violation 494: 470: 464: 431: 428:beauty quark 427: 424:bottom quark 423: 421: 322: 291:Color charge 282: 229: 203: 131:Antiparticle 83:Interactions 33:Bottom quark 29: 2485:Quark model 2253:Theta meson 2156:Positronium 2068:Omega meson 2063:J/psi meson 1993:Antineutron 1904:Dark photon 1869:Graviphoton 1828:Stop squark 1536:Down (quark 1017:18 December 824:Quark model 752:bottomonium 741:charm quark 602:charm quark 573:"bare" mass 527:bottomonium 509:Haim Harari 503:to explain 485:Higgs boson 249:charm quark 39:Composition 2548:Categories 2227:Heptaquark 2188:Superatoms 2121:Pentaquark 2111:Tetraquark 2093:Quarkonium 1983:Antiproton 1884:Leptoquark 1819:Neutralino 1581:antiquark) 1571:antiquark) 1566:Top (quark 1561:antiquark) 1551:antiquark) 1541:antiquark) 1531:antiquark) 1500:Elementary 1190:: 793–810. 1147:(5): 252. 894:2433/66179 840:References 697:down quark 610:CKM matrix 577:4.18  575:is around 440:generation 175:Discovered 73:Generation 51:Statistics 2465:Particles 2410:Particles 2369:Polariton 2359:Plasmaron 2329:Dropleton 2222:Hexaquark 2193:Molecules 2181:Protonium 2058:Phi meson 2043:Rho meson 2015:Xi baryon 1947:Composite 1783:Gravitino 1526:Up (quark 1435:636743000 1314:R. Nave. 829:B-factory 691:) and an 636:B-tagging 632:collision 612:elements 594:top quark 481:top quark 236:1S scheme 160:Theorized 56:fermionic 18:B-physics 2441:timeline 2293:R-hadron 2248:Glueball 2232:Skyrmion 2166:Tauonium 1879:Inflaton 1874:Graviton 1854:Curvaton 1824:Sfermion 1814:Higgsino 1809:Chargino 1770:Gauginos 1629:Neutrino 1614:Antimuon 1604:Positron 1599:Electron 1509:Fermions 1452:Archived 1400:B Decays 1397:(1994). 1316:"Quarks" 916:Fermilab 818:See also 685:B mesons 604:via the 598:up quark 516:Fermilab 434:, is an 399:⁠− 341:⁠− 254:up quark 2429:Related 2400:Baryons 2374:Polaron 2364:Plasmon 2339:Fracton 2334:Exciton 2288:Diquark 2283:Pomeron 2258:T meson 2215:Baryons 2176:Pionium 2161:Muonium 2088:D meson 2083:B meson 1988:Neutron 1973:Nucleon 1965:Baryons 1956:Hadrons 1919:Tachyon 1894:Majoron 1859:Dilaton 1788:Photino 1624:Antitau 1591:Leptons 1375:Bibcode 1332:29 June 1295:Bibcode 1214:Bibcode 1206:Science 1169:1155396 1149:Bibcode 1131:Yoh, J. 1044:Bibcode 954:Bibcode 922:24 July 871:Bibcode 834:B meson 792:baryons 790:Bottom 678:hadrons 460:⁠ 448:⁠ 432:b quark 414:⁠ 391:⁠ 379:⁠ 356:⁠ 318:⁠ 306:⁠ 279:⁠ 267:⁠ 100:gravity 2559:Quarks 2405:Mesons 2354:Phonon 2349:Magnon 2271:Others 2241:Mesons 2134:Others 2030:Mesons 1978:Proton 1842:Others 1797:Others 1778:Gluino 1712:Scalar 1692:Photon 1675:Bosons 1518:Quarks 1433:  1423:  1353:  1167:  1083:  803:Λ 640:mesons 587:proton 561:"down" 462:  320:  226:  213:scheme 200:  170:(1973) 106:Symbol 88:strong 62:Family 2393:Lists 2384:Trion 2379:Roton 2319:Anyon 2146:Atoms 1909:Preon 1849:Axion 1804:Axino 1697:Gluon 1684:Gauge 1371:(PDF) 1011:(PDF) 1000:(PDF) 773:meson 652:Belle 648:BaBar 553:"top" 535:DORIS 531:muons 444:quark 430:, or 223:−0.03 221:+0.03 197:−0.03 195:+0.04 77:third 66:quark 2344:Hole 2171:Onia 2078:Kaon 2038:Pion 1609:Muon 1431:OCLC 1421:ISBN 1351:ISBN 1334:2008 1165:OSTI 1081:ISBN 1019:2012 924:2009 781:(3P) 775:and 720:and 670:and 656:LHCb 654:and 619:and 579:GeV/ 559:and 557:"up" 539:DESY 499:and 475:and 422:The 301:Spin 228:GeV/ 218:4.65 202:GeV/ 192:4.18 187:Mass 166:and 92:weak 1619:Tau 1413:doi 1383:doi 1303:doi 1291:239 1222:doi 1210:200 1157:doi 1052:doi 972:hdl 962:doi 889:hdl 879:doi 785:LHC 743:or 695:or 600:or 537:at 362:: 0 295:yes 2550:: 1429:. 1419:. 1411:. 1407:: 1381:. 1345:. 1324:. 1318:. 1301:. 1289:. 1220:. 1208:. 1196:^ 1186:. 1163:. 1155:. 1145:39 1143:. 1137:. 1110:. 1104:. 1075:. 1050:. 1040:57 1038:. 1002:. 970:. 960:. 950:98 948:. 944:. 932:^ 903:^ 887:. 877:. 867:49 865:. 859:. 847:^ 813:). 693:up 650:, 624:cb 617:ub 608:. 563:. 511:. 487:. 468:. 426:, 397:: 395:RH 393:, 377:: 375:LH 360:RH 358:, 339:: 337:LH 251:or 211:MS 98:, 94:, 90:, 2117:) 2113:( 1830:) 1826:( 1484:e 1477:t 1470:v 1437:. 1415:: 1389:. 1385:: 1377:: 1359:. 1336:. 1309:. 1305:: 1297:: 1228:. 1224:: 1216:: 1171:. 1159:: 1151:: 1112:2 1089:. 1058:. 1054:: 1046:: 1021:. 980:. 974:: 964:: 956:: 926:. 897:. 891:: 881:: 873:: 808:b 779:b 777:χ 764:ϒ 734:s 729:B 715:c 710:B 699:. 621:V 614:V 581:c 465:e 457:3 454:/ 451:1 411:3 408:/ 405:2 401:+ 388:3 385:/ 382:1 353:2 350:/ 347:1 343:+ 323:ħ 315:2 312:/ 309:1 283:e 276:3 273:/ 270:1 265:− 238:) 234:( 230:c 215:) 208:( 204:c 155:) 145:b 117:b 20:)

Index

B-physics
Composition
elementary particle
Statistics
fermionic
quark
Generation
Interactions
strong
weak
electromagnetic
gravity
Antiparticle
Makoto Kobayashi
Toshihide Maskawa
Leon M. Lederman
Mass
GeV/c
MS scheme
GeV/c
1S scheme
Decays into
charm quark
up quark
Electric charge
e
Color charge
Spin
ħ
Weak isospin

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