Các tương tác không vi phân của axion với nucleon ở N lớn và nhỏ

Journal of High Energy Physics - Tập 2020 Số 1 - Trang 1-63 - 2020
Bigazzi, Francesco1, Cotrone, Aldo L.1,2, Järvinen, Matti3,4, Kiritsis, Elias5,6
1INFN, Sezione di Firenze, Sesto Fiorentino, Italy
2Dipartimento di Fisica e Astronomia, Università di Firenze, Sesto Fiorentino, Italy
3Institute for Theoretical Physics, Utrecht University, Utrecht, The Netherlands
4Department of Physics and Helsinki Institute of Physics, University of Helsinki, Finland
5Crete Center for Theoretical Physics, Department of Physics, University of Crete, Heroklion, Greece
6APC, Université Paris 7, CNRS/IN2P3, CEA/IRFU, Obs. de Paris, Sorbonne Paris Cité, Bâtiment Condorcet, Paris Cedex 13, France

Tóm tắt

Trong số các khả năng tương tác CP-khác của axion với vật chất thông thường, các tương tác Yukawa với nucleon là quan trọng nhất cho hiện tượng học. Chúng tôi phân tích các tương tác không vi phân này trong ba cách tiếp cận khác nhau: lý thuyết trường hiệu quả chuẩn, mô hình Skyrme và QCD holographic. Trong tất cả các trường hợp, các tương tác có thể được liên hệ với các tương tác CP-khác không vi phân với nucleon của các meson có khối lượng thấp và η′. Sử dụng lý thuyết trường hiệu quả, chúng tôi thảo luận cách để suy diễn các biểu thức cho các hạng mục tương tác CP-khác dưới dạng các hàm của các tham số của Lagrangian hiệu quả ở số màu Nc và số kiểu Nf tổng quát. Sau đó, chúng tôi tính toán các tương tác CP-khác với nucleon của axion, η′ và các meson pseudo-Goldstone trong cả mô hình Skyrme và mô hình QCD holographic với Nf = 2, 3. Chúng tôi trình bày các biểu thức độc lập mô hình cho các hệ số của các tương tác axion-nucleon không vi phân. Điều này cho phép chúng tôi cung cấp ước lượng định lượng cho các tương tác này.

Từ khóa

#axion #nucleon #tương tác không vi phân #lý thuyết trường hiệu quả #mô hình Skyrme #QCD holographic

Tài liệu tham khảo

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