Phys. Rev. D 72, 034503 (2005) [12 pages]Electric polarizability of neutral hadrons from lattice QCDReceived 13 August 2004; revised 10 June 2005; published 9 August 2005 By simulating a uniform electric field on a lattice and measuring the change in the rest mass, we calculate the electric polarizability of neutral mesons and baryons using the methods of quenched lattice QCD. Specifically, we measure the electric polarizability coefficient from the quadratic response to the electric field for 10 particles: the vector mesons ρ0 and K*0; the octet baryons n, Σ0, Λ0, and Ξ0; and the decuplet baryons Δ0, Σ*0, and Ξ*0. Independent calculations using two fermion actions were done for consistency and comparison purposes. One calculation uses Wilson fermions with a lattice spacing of a=0.10 fm. The other uses tadpole-improved Lüscher-Weisz gauge fields and clover quark action with a lattice spacing a=0.17 fm. Our results for neutron electric polarizability are compared to experiment. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.034503
DOI:
10.1103/PhysRevD.72.034503
PACS:
11.15.Ha, 12.38.Gc, 13.40.−f
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.