| Measurement of matter-antimatter differences in beauty baryon decays | |
| Aaij, R.41; Adeva, B.40; Adinolfi, M.50; Ajaltouni, Z.5; Akar, S.6; Albrecht, J.10; Alessio, F.41; Alexander, M.55; Ali, S.44; Alkhazov, G.31 | |
| 刊名 | Nature physics
 |
| 2017-04-01 | |
| 卷号 | 13期号:4页码:391-+ |
| ISSN号 | 1745-2473 |
| DOI | 10.1038/nphys4021 |
| 通讯作者 | Neri, n.(nicola.neri@mi.infn.it) |
| 英文摘要 | Differences in the behaviour of matter and antimatter have been observed in k and b meson decays, but not yet in any baryon decay. such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as cp violation. here, using data from the lhcb experiment at the large hadron collider, we search for cp-violating asymmetries in the decay angle distributions of lambda(0)(b) baryons decaying to p pi(-) pi(+) pi(-) and p pi(-) k+k- final states. these four-body hadronic decays are a promising place to search for sources of cp violation both within and beyond the standard model of particle physics. we find evidence for cp violation in lambda(0)(b) to p pi(-) pi(+) pi(-) decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. this represents the first evidence for cp violation in the baryon sector. |
| WOS关键词 | CP-VIOLATION ; LAMBDA(B) |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | NATURE PUBLISHING GROUP |
| WOS记录号 | WOS:000425926700001 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2178235 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Neri, N. |
| 作者单位 | 1.CBPF, BR-22290180 Rio De Janeiro, Brazil 2.Univ Fed Rio de Janeiro, BR-21941972 Rio de Janeiro, Brazil 3.Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China 4.Univ Savoie Mont Blanc, CNRS, LAPP, IN2P3, F-74941 Annecy Le Vieux, France 5.Clermont Univ, Univ Blaise Pascal, CNRS IN2P3, LPC, F-63177 Clermont Ferrand, France 6.Aix Marseille Univ, CNRS, CPPM, IN2P3, F-12388 Marseille, France 7.Univ Paris 11, CNRS, LAL, IN2P3, F-91898 Orsay, France 8.Univ Paris 06, Univ Paris Diderot, CNRS IN2P3, LPNHE, F-75252 Paris, France 9.Rhein Westfal TH Aachen, Phys Inst 1, D-52056 Aachen, Germany 10.Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany |
| 推荐引用方式 GB/T 7714 | Aaij, R.,Adeva, B.,Adinolfi, M.,et al. Measurement of matter-antimatter differences in beauty baryon decays[J]. Nature physics,2017,13(4):391-+. |
| APA | Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2017).Measurement of matter-antimatter differences in beauty baryon decays.Nature physics,13(4),391-+. |
| MLA | Aaij, R.,et al."Measurement of matter-antimatter differences in beauty baryon decays".Nature physics 13.4(2017):391-+. |
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