Comparison of Nucleon Form Factors from Lattice QCD Against the Light Front Cloudy Bag Model and Extrapolation to the Physical Mass Regime

Journal Article · Sat Jan 01 00:00:00 EST 2005 · Phys. Rev. C

DOI:https://doi.org/10.1103/PhysRevC.71.055204· OSTI ID:836115

Matevosyan, Hrayr H; Miller, Gerald A; Thomas, Anthony W

We explore the possibility of extrapolating state of the art lattice QCD calculations of nucleon form factors to the physical regime. We find that the lattice results can be reproduced using the Light Front Cloudy Bag Model by letting its parameters be analytic functions of the quark mass. We then use the model to extend the lattice calculations to large values of Q2 of interest to current and planned experiments. These functions are also used to define extrapolations to the physical value of the pion mass, thereby allowing us to study how the predicted zero in GE(Q2)/GM(Q2) varies as a function of quark mass.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 836115
• Report Number(s): JLAB-THY-04-43; DOE/ER/40150-3055; nucl-th/0501044; NT@UW-04-030
• Journal Information: Phys. Rev. C, Vol. 71, Issue 05
• Country of Publication: United States
• Language: English