簡易檢索 / 詳目顯示

研究生: 張祐瑋
Zhang, You-Wei
論文名稱: 新微中子數據對等效馬約拉那質量的限制
Constraints on The Effective Majorana Mass from New Neutrino Data
指導教授: 張敬民
Cheung, Kingman
口試委員: 耿朝強
Geng, Chao-Qiang
徐百嫻
Hsu, Pai-Hsien
學位類別: 碩士
Master
系所名稱: 理學院 - 物理學系
Department of Physics
論文出版年: 2017
畢業學年度: 105
語文別: 英文
論文頁數: 18
中文關鍵詞: 微中子微中子質量無微中子雙貝他衰變CP相等效馬約拉那質量馬約拉那粒子
外文關鍵詞: neutrino, neutrino mass, neutrinoless double beta decay, CP phase, effective Majorana mass, Majorana particle
相關次數: 點閱:1下載:0
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報
  • 無微中子雙貝他衰變是一個檢測微中子特性的重要反應,若微中子屬馬約拉那粒子,則可在實驗上觀察到此反應且輕子數不守恆,本文利用新擬合微中子振盪數據給予此反應中的參數---等效馬約拉那質量---限制,在微中子質量相近的前提下,兩種質量層級會給出不同的結果,且CP相的差異對結果影響明顯。


    The neutrinoless double beta decay is an important process to test the nature of neutrinos. If neutrinos are Majorana particles, the decay can be observed in experiment and the lepton number is not conserved. We derive some formulae of the parameter of this process called the effective Majorana mass and use new fit data of neutrino oscillations to give constraints on it. With the assumption that all neutrinos have similar mass, we conclude that the two mass hierarchies would give different values and the CP phases have significant effect.

    1 Introduction . . . . . . . . . . . . . . . . . . . . 1 2 Theoretical Basis . . . . . . . . . . . . . . . . . .4  2.1 Dirac Mass . . . . . . . . . . . . . . . . . . . 4  2.2 Majorana Mass . . . . . . . . . . . . . . . . . . 5  2.3 Neutrino Mass for One Generation . . . . . . . . 7  2.4 Mixing Matrix . . . . . . . . . . . . . . . . . . 8  2.5 Mass Matrix . . . . . . . . . .. . . . . . . . . 8 3 The Effective Majorana Mass Analysis . . . . . . . . 10 4 Summary . . . . . . . . . . . . . . . . . . . . . . .14 Appendix . . . . . . . . . . . . . . . . . . . . . . . 15  A Elements of Mass Matrix . . . . . . .. . . . . . . 15  B Global Fit Data . . . . . . .. . . . . . . . . . . 16 References . . . . . . . . . . . . . . . . . . . . . . 17

    [1] (i) E. Fermi, Ricerca Scientifica 4, 491 (1933); (ii) E. Fermi, Z. Physik 88, 161 (1934); an English translated version: F. L. Wilson Am. J. Phys. 36, 1150 (1968).
    [2] F. Reines and C. L. Cowan, Jr., Phys. Rev. 92, 830 (1953).
    [3] B. Pontecorvo, Sov. Phys. JETP 26, 984 (1968).
    [4] C. Athanassopoulos et al. (LSND Collaboration), Phys. Rev. Lett. 75, 2650 (1995) [arXiv:nucl-ex/9504002].
    [5] an arrangement of new sterile neutrino data can be found in the articles: F. Capozzi, C. Giunti, M. Laveder, and A. Palazzo, Phys. Rev. D 95, 033006 (2017) [arXiv:1612.07764 [hep-ph]]; A. Palazzo, arXiv:1705.01592[hep-ph].
    [6] Z. Maki, M. Nakagawa and S. Sakata, Prog. Theor. Phys. 28, 870 (1962).
    [7] H. Weyl, Z. Physik 56, 330 (1929).
    [8] L. Landau, Nucl. Phy. 3, 127 (1957); T. D. Lee and C.-N. Yang, Phys. Rev. 105, 1671 (1957); A. Salam, Nuovo Cim. 5, 299 (1957).
    [9] E. Majorana, Nuovo Cim. 14, 171 (1937).
    [10] K. Abe et al. (T2K Collaboration), Phys. Rev. Lett. 118, 151801 (2017) [arXiv:1701.00432 [hep-ex]].
    [11] K. Cheung, Phys. Lett. B 562, 97 (2003) [arXiv:hep-ph/0302265].
    [12] P. A. R. Ade et al. (Planck Collaboration), A&A 594, A13 (2016) [arXiv:1502.01589v3 [astro-ph.CO]].
    [13] F. Capozzi et al., Phys. Rev. D 95, 096014 (2017)
    [arXiv:1703.04471 [hep-ph]].

    QR CODE