Deuteron electric dipole moment from holographic QCD

被引：1

作者：

Bartolini, Lorenzo ^{[1
,2
]}

Bolognesi, Stefano ^{[1
,2
]}

Gudnason, Sven Bjarke ^{[3
]}

机构：

[1] Univ Pisa, Dept Phys Enrico Fermi, 3 Edificio C, I-56127 Pisa, Italy

[2] Ist Nazl Fis Nucl, Sez Pisa Largo Pontecorvo, 3 Edificio C, I-56127 Pisa, Italy

[3] Henan Univ, Inst Contemporary Math, Sch Math & Stat, Kaifeng 475004, Henan, Peoples R China

来源：

PHYSICAL REVIEW D | 2020年 / 101卷 / 08期

基金：

中国国家自然科学基金;

关键词：

NEUTRON; BARYONS;

D O I：

10.1103/PhysRevD.101.086009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the electric dipole moment (EDM) of the deuteron in the holographic QCD model of Witten-Sakai-Sugimoto. Previously, the leading contribution to the EDM of nucleons was computed, finding opposite values for the proton and the neutron, which then cancel each other in the deuteron state. Here we compute the next-to-leading order contribution, which provides a splitting between their absolute value. At large N-c and large 't Hooft coupling lambda, nuclei are bound states of almost isolated nucleons. In particular, we find that in this limit the deuteron EDM is given by the splitting between proton and neutron EDMs. Our estimate for the deuteron EDM extrapolated to the physical values of N-c, lambda, M-KK, and m(q) is d(d) = -0.92 x 10(16)theta e . cm. This is consistent, in sign and magnitude, with results found previously in the literature and obtained using completely different methods.

引用

页数：19

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