发表机构
Institut für Kernphysik, Johannes Gutenberg-Universität Mainz(美因茨约翰内斯·古腾堡大学核物理研究所)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文推导了自旋1靶标张量结构函数的求和规则,基于Siegert关系,给出受保护矩与ET条件,并建议通过分离LT和TT响应在JLab和EIC进行实验验证。
AI 中文摘要
我们推导了一系列针对自旋为一或更高靶标的张量结构函数的求和规则,这些规则根植于精确的Siegert关系。混合的秩二$TT$-$LT$简并将具有相反交叉奇偶性的振幅组合起来,在超收敛假设下,在Hoodbhoy--Jaffe--Manohar(HJM)基中给出$\int_0^1\\! d x\\,[b_2(x,Q^2)-3b_4(x,Q^2)]=0$。在大$Q^2$下,受保护的矩与Detmold的靶标质量完备的扭度二OPE一致;在严格的Bjorken投影中,若忽略$b_4$,则简化为Efremov--Teryaev(ET)型条件$\int_0^1\\! d x\\,x\\,b_1(x)=0$,其测量范围足迹与HERMES数据一致。另外两个秩二组合连接了交叉偶振幅,并通过加权HJM矩确定相应的减法函数。受保护的组合可通过分离的张量$LT$和$TT$响应来隔离,为JLab以及最终的未来EIC提供了直接的实验策略。
英文摘要
We derive a family of sum rules for the tensor structure functions of targets with spin one or higher, rooted in exact Siegert relations. The mixed rank-two $TT$--$LT$ degeneracy combines amplitudes of opposite crossing parity and, under the superconvergence assumption, gives $\int_0^1\! d x\,[b_2(x,Q^2)-3b_4(x,Q^2)]=0$ in the Hoodbhoy--Jaffe--Manohar (HJM) basis. At large $Q^2$, the protected moment agrees with Detmold's target-mass-complete twist-two OPE; in the strict Bjorken projection, and if $b_4$ is neglected, it reduces to the Efremov--Teryaev (ET)-type condition $\int_0^1\! d x\,x\,b_1(x)=0$, whose measured-range footprint is consistent with the HERMES data. Two further rank-two combinations connect crossing-even amplitudes and determine the corresponding subtraction functions through weighted HJM moments. The protected combination can be isolated through separated tensor $LT$ and $TT$ responses, providing a direct experimental strategy for JLab and, ultimately, a future EIC.
Comments18 pages, 2 figures