617:
503:
Bottom quarks have (by convention) a bottomness of −1 while bottom antiquarks have a bottomness of +1. The convention is that the flavour quantum number sign for the quark is the same as the sign of the
498:
574:
298:
329:
293:
658:
579:
This term is rarely used. Most physicists simply refer to "the number of bottom quarks" and "the number of bottom antiquarks".
322:
682:
434:
315:
303:
687:
540:
651:
530:
369:
22:
644:
60:
8:
594:
526:
632:
624:
534:
373:
225:
27:
677:
505:
142:
628:
590:
35:
671:
525:
As with other flavour-related quantum numbers, bottomness is preserved under
361:
117:
108:
402:
126:
171:
69:
151:
616:
268:
599:
343:
78:
44:
16:
Term used in physics to refer to the number of bottom quarks
543:
437:
512:) of that quark (in this case, Q = −
568:
492:
588:
493:{\displaystyle B^{\prime }=-(n_{b}-n_{\bar {b}})}
669:
537:. For first-order weak reactions, it holds that
372:reflecting the difference between the number of
652:
323:
659:
645:
330:
316:
598:
569:{\displaystyle \Delta B^{\prime }=\pm 1}
593:(2009). "Lessons in Particle Physics".
670:
611:
13:
552:
544:
443:
428:) that are present in a particle:
14:
699:
615:
487:
480:
454:
1:
582:
631:. You can help Knowledge by
531:electromagnetic interactions
7:
10:
704:
683:Flavour (particle physics)
610:
356:; using a prime as plain
304:Flavour complementarity
101:Related quantum numbers
688:Particle physics stubs
627:–related article is a
570:
494:
370:flavour quantum number
571:
495:
541:
435:
401:) and the number of
360:is used already for
566:
490:
640:
639:
589:Anchordoqui, L.;
535:weak interactions
483:
374:bottom antiquarks
340:
339:
695:
661:
654:
647:
625:particle physics
619:
612:
604:
602:
575:
573:
572:
567:
556:
555:
533:, but not under
521:
520:
516:
499:
497:
496:
491:
486:
485:
484:
476:
466:
465:
447:
446:
426:
425:
424:
417:
416:
399:
398:
397:
391:
388:
387:
332:
325:
318:
226:Weak hypercharge
28:particle physics
19:
18:
703:
702:
698:
697:
696:
694:
693:
692:
668:
667:
666:
665:
608:
585:
551:
547:
542:
539:
538:
518:
514:
513:
506:electric charge
475:
474:
470:
461:
457:
442:
438:
436:
433:
432:
427:
423:
421:
420:
419:
415:
413:
412:
411:
410:
400:
396:
394:
393:
392:
389:
386:
384:
383:
382:
381:
336:
266:
253:
242:
234:
219:
143:Electric charge
139:
57:
36:quantum numbers
26:
17:
12:
11:
5:
701:
691:
690:
685:
680:
664:
663:
656:
649:
641:
638:
637:
620:
606:
605:
584:
581:
565:
562:
559:
554:
550:
546:
501:
500:
489:
482:
479:
473:
469:
464:
460:
456:
453:
450:
445:
441:
422:
414:
409:
395:
385:
380:
338:
337:
335:
334:
327:
320:
312:
309:
308:
307:
306:
301:
296:
288:
287:
286:Flavour mixing
283:
282:
281:
280:
279:
278:
264:
255:
251:
240:
232:
223:
222:
221:
217:
204:
166:
165:
161:
160:
159:
158:
149:
140:
137:
124:
115:
103:
102:
98:
97:
96:
95:
85:
76:
67:
58:
55:
39:
38:
31:
30:
15:
9:
6:
4:
3:
2:
700:
689:
686:
684:
681:
679:
676:
675:
673:
662:
657:
655:
650:
648:
643:
642:
636:
634:
630:
626:
621:
618:
614:
613:
609:
601:
596:
592:
587:
586:
580:
577:
563:
560:
557:
548:
536:
532:
528:
523:
511:
507:
477:
471:
467:
462:
458:
451:
448:
439:
431:
430:
429:
408:
404:
403:bottom quarks
379:
375:
371:
367:
363:
362:baryon number
359:
355:
354:
349:
345:
333:
328:
326:
321:
319:
314:
313:
311:
310:
305:
302:
300:
297:
295:
292:
291:
290:
289:
285:
284:
276:
275:
271:
263:
259:
256:
250:
246:
239:
236:
235:
231:
227:
224:
216:
212:
208:
205:
202:
198:
194:
190:
186:
182:
179:
178:
177:
173:
170:
169:
168:
167:
163:
162:
157:
153:
150:
148:
144:
141:
136:
132:
128:
125:
123:
119:
118:Lepton number
116:
114:
110:
109:Baryon number
107:
106:
105:
104:
100:
99:
93:
89:
86:
84:
80:
77:
75:
71:
68:
66:
62:
59:
54:
50:
46:
43:
42:
41:
40:
37:
33:
32:
29:
24:
21:
20:
633:expanding it
622:
607:
578:
524:
509:
502:
406:
377:
365:
357:
352:
351:
347:
341:
273:
269:
261:
257:
248:
244:
237:
229:
214:
210:
206:
200:
196:
192:
188:
184:
180:
175:
164:Combinations
155:
146:
134:
130:
127:Weak isospin
121:
112:
91:
87:
82:
73:
64:
52:
48:
299:PMNS matrix
172:Hypercharge
70:Strangeness
672:Categories
591:Halzen, F.
583:References
348:bottomness
294:CKM matrix
199:′ +
88:Bottomness
600:0906.1271
561:±
553:′
545:Δ
481:¯
468:−
452:−
444:′
508:(symbol
353:B′
350:(symbol
152:X-charge
34:Flavour
517:⁄
344:physics
94:′
79:Topness
45:Isospin
23:Flavour
678:Quarks
527:strong
366:beauty
623:This
595:arXiv
368:is a
364:) or
267:= 5 (
243:= 2 (
209:= 2 (
61:Charm
629:stub
529:and
576:.
522:).
342:In
260:+ 2
183:= (
133:or
51:or
674::
346:,
272:−
247:−
228::
213:−
195:+
191:+
187:+
174::
154::
145::
129::
120::
111::
90::
81::
72::
63::
47::
25:in
660:e
653:t
646:v
635:.
603:.
597::
564:1
558:=
549:B
519:3
515:1
510:Q
488:)
478:b
472:n
463:b
459:n
455:(
449:=
440:B
418:b
407:n
405:(
390:b
378:n
376:(
358:B
331:e
324:t
317:v
277:)
274:L
270:B
265:W
262:Y
258:X
254:)
252:3
249:T
245:Q
241:W
238:Y
233:W
230:Y
220:)
218:3
215:I
211:Q
207:Y
203:)
201:T
197:B
193:C
189:S
185:B
181:Y
176:Y
156:X
147:Q
138:3
135:T
131:T
122:L
113:B
92:B
83:T
74:S
65:C
56:3
53:I
49:I
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.