教師資料查詢 | 類別: 期刊論文 | 教師: 王尚勇 Shang-Yung Wang (瀏覽個人網頁)

標題:Gauge independent approach to chiral symmetry breaking in a strong magnetic field
學年94
學期2
出版(發表)日期2006/07/17
作品名稱Gauge independent approach to chiral symmetry breaking in a strong magnetic field
作品名稱(其他語言)
著者Leung, C. N.; Wang, S. Y.
單位淡江大學物理學系
出版者Elsevier
著錄名稱、卷期、頁數Nuclear Physics B 747(1-2), p.266-293
摘要The gauge independence of the dynamical fermion mass generated through chiral symmetry breaking in QED in a strong, constant external magnetic field is critically examined. We show that the bare vertex approximation, in which the vertex corrections are ignored, is a consistent truncation of the Schwinger–Dyson equations in the lowest Landau level approximation. The dynamical fermion mass, obtained as the solution of the truncated Schwinger–Dyson equations evaluated on the fermion mass shell, is shown to be manifestly gauge independent. By establishing a direct correspondence between the truncated Schwinger–Dyson equations and the 2PI (two-particle-irreducible) effective action truncated at the lowest nontrivial order in the loop expansion as well as in the 1/Nf expansion (Nf is the number of fermion flavors), we argue that in a strong magnetic field the dynamical fermion mass can be reliably calculated in the bare vertex approximation.
關鍵字Gauge independence;Chiral symmetry;Magnetic field;Schwinger–Dyson equations;1/N expansion
語言英文
ISSN0550-3213
期刊性質國內
收錄於SCI;
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式,電子版
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