Improved lattice QCD <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> vector, axial-vector, and tensor form factors

Summary

We present an update of HPQCD’s lattice quantum chromodynamics (QCD) determination of the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>B</a:mi><a:mi>c</a:mi></a:msub><a:mo stretchy="false">→</a:mo><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi></a:math> vector and axial-vector form factors, and provide new results for the tensor form factors. We use the highly improved staggered quark (HISQ) action for all valence quarks, together with the second generation MILC <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:msub><d:mi>n</d:mi><d:mi>f</d:mi></d:msub><d:mo>=</d:mo><d:mn>2</d:mn><d:mo>+</d:mo><d:mn>1</d:mn><d:mo>+</d:mo><d:mn>1</d:mn></d:math> HISQ gluon field configurations. This calculation includes two additional ensembles, one w