Spatially improved operators for excited hadrons on the lattice -: art. no. 054502

被引：54

作者：

Burch, T ^{[1
]}

Gattringer, C

Glozman, LY

Kleindl, R

Lang, CB

Schäfer, A

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[2] Graz Univ, Inst Theoret Phys, FB Theoret Phys, A-8010 Graz, Austria

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.70.054502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new approach for determining spatially optimized operators that can be used for lattice spectroscopy of excited hadrons. Jacobi smeared quark sources with different widths are combined to construct hadron operators with different spatial wave functions. We use the variational method to determine those linear combinations of operators that have optimal overlap with ground and excited states. The details of the new approach are discussed and we demonstrate the power of the method using examples from quenched baryon and meson spectroscopy. In particular, we study the Roper state and rho(1450) and discuss some physical implications of our tests.

引用

页码：054502 / 1

页数：12

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