Burch, Tommy and Gattringer, Christof and Glozman, Leonid Ya. and Kleindl, Reinhard and Lang, C. B. and Schaefer, Andreas (2004) Spatially improved operators for excited hadrons on the lattice. PHYSICAL REVIEW D, 70 (5): 054502. ISSN 0556-2821,
Full text not available from this repository.Abstract
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CHIRALLY IMPROVED FERMIONS; GINSPARG-WILSON FERMIONS; SYMMETRY RESTORATION; NUCLEON SPECTRUM; ROPER RESONANCE; MASS-SPECTRUM; QUENCHED QCD; GAUGE-THEORY; FIXED-POINT; N-ASTERISK; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Jun 2021 09:03 |
| Last Modified: | 30 Jun 2021 09:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37298 |
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