Coulomb artifacts and breakdown of perturbative matching in lattice NRQCD

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Perturbative Matching of the NRQCD Heavy-Light Axial Current

A one-loop matching calculation between Lattice NRQCD and full QCD for the heavy-light axial current is described and the effects of renormalization on fB are discussed.

متن کامل

Perturbative Matching of Heavy-Light Currents with NRQCD Heavy Quarks

Lattice studies of hadronic matrix elements require matching between operators in full continuum QCD and those in the lattice theory being simulated. In the present article we will focus on an effective lattice theory which combines nonrelativistic (NRQCD) heavy quarks and clover light quarks. We wish to match the theories correct through O( p M , α p M , α ap). For heavy meson (e.g. B and B∗) ...

متن کامل

Applications of Perturbative NRQCD a

We review the theoretical ideas and tools required to arrive at a next-to-next-to-leading order (NNLO) description of the heavy quark-antiquark production cross section in e + e − annihilation for the case that the center of mass kinetic energy of the quarks is larger than Λ QCD. In this case the NNLO cross section can be calculated with purely perturbative methods. We present details of the ca...

متن کامل

Heavy Baryons from Lattice NRQCD

Extraction of correct mass splittings between vector and pseudoscalar mesons remains a challenging problem in lattice QCD. While quenched lattice QCD has been unable to extract correct mass splittings [1], so far this problem persists even with full lattice QCD [2]. One may thus ask whether lattice results for baryon mass splittings exhibit similar suppression compared to experimental numbers. ...

متن کامل

Nrqcd on an Anisotropic Lattice *

We present preliminary results for the Υ spectrum on an anisotropic lattice using the improved O(mv 6) NRQCD Hamiltonian. We find that accurate results can be obtained in moderate computer times and that they agree with earlier results on an isotropic lattice. 1. The anisotropic lattice On an anisotropic lattice an improved action is used in which the coupling in the " time " direction is tuned...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Journal of High Energy Physics

سال: 2017

ISSN: 1029-8479

DOI: 10.1007/jhep12(2017)007