STRONG INTERACTION SHIFT AND WIDTH OF THE 1S LEVEL IN PIONIC HYDROGEN

被引：54

作者：

SIGG, D

BADERTSCHER, A

BOGDAN, M

GOUDSMIT, PFA

LEISI, HJ

MATSINOS, E

SCHRODER, HC

ZHAO, ZG

CHATELLARD, D

EGGER, JP

JEANNET, E

ASCHENAUER, EC

GABATHULER, K

SIMONS, LM

ELHASSANI, AJR

机构：

[1] ETH ZURICH,INST PARTICLE PHYS,CH-5232 VILLIGEN PSI,SWITZERLAND

[2] UNIV NEUCHATEL,INST PHYS,CH-2000 NEUCHATEL,SWITZERLAND

[3] PAUL SCHERRER INST,CH-5232 VILLIGEN PSI,SWITZERLAND

[4] ECOLE MOHAMMADIA INGENIEURS,RABAT,MOROCCO

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.75.3245

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The 3p-1s x-ray line of pionic hydrogen was measured with a reflecting bent crystal spectrometer. The strong interaction energy level shift and the total decay width of the Is state, obtained from the transition energy and the linewidth, are epsilon(1s) = -7.127 +/- 0.028(stat) +/- 0.036(syst) eV (attractive) and Gamma(1s) = 0.97 +/- 0.10(stat) +/- 0.05(syst) eV. The corresponding hadronic pi N s-wave scattering lengths for elastic scattering and single charge exchange are a(pi)(h)-(p-->pi)-(p) = 0.0885 +/- 0.0009m(pi)(-1) and a(pi)-(h)(p-->pi)0(n) = -0.136 +/- 0.010m(pi)(-1).

引用

页码：3245 / 3248

页数：4

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