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Phân tích QCD về các hàm cấu trúc không đơn nhất với độ chính xác NNLO, dựa trên biến đổi Laplace
Tóm tắt
Trong công trình này, sử dụng kỹ thuật biến đổi Laplace, chúng tôi trình bày kết quả của mình cho các phân bố quark không đơn nhất cũng như hàm cấu trúc nucleon $$F_2(x,Q^2)$$ trong trường hợp không phân cực với độ chính xác đến bậc tiếp theo của QCD. Chúng tôi sẽ đặc biệt so sánh kết quả của mình với các bộ hàm phân bố parton quark giá trị như CT14, CT18, MMHT14, MKAM16 và NNPDF. Để xây dựng hàm cấu trúc nucleon, chúng tôi sử dụng sự mở rộng của các đa thức Jacobi, đây là một phép biến đổi phù hợp để chuyển đổi kết quả của hàm cấu trúc không đơn nhất từ không gian Laplace s về không gian Bjorken x. Chúng tôi cũng sẽ xem xét các đóng góp của sửa đổi khối lượng mục tiêu cũng như các hiệu ứng xoắn cao ở vùng x lớn cho các hàm cấu trúc của proton và deuteron. Kết quả của chúng tôi về các hàm phân bố quark không phân cực và các hàm cấu trúc nucleon phù hợp tốt với các mô hình lý thuyết gần đây và dữ liệu thực nghiệm có sẵn.
Từ khóa
#QCD #hàm cấu trúc nucleon #phân bố quark #biến đổi Laplace #lý thuyết hạt cơ bảnTài liệu tham khảo
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