A lattice QCD study of the B → ππℓ(equation presented) transition

Luka Leskovec; Stefan Meinel; Marcus Petschlies; John Negele; Srijit Paul; Andrew Pochinsky; Gumaro Rendon

A lattice QCD study of the B → ππℓ(equation presented) transition

Luka Leskovec
, Stefan Meinel
, Marcus Petschlies
, John Negele
, Srijit Paul
, Andrew Pochinsky
, Gumaro Rendon

Research output: Contribution to journal › Conference article › peer-review

Abstract

V_ub is the smallest and least known of all CKM matrix elements; the community currently determines its magnitude primarily through the exclusive process B → πℓ(equation presented). Here we present our progress toward a lattice QCD determination of the V_ub matrix element from a novel transition - the B → ππℓ(equation presented) process, where the ππ system is in a P wave and scattering features the ρ(770) resonance as an enhancement. We perform our calculation on N_f = 2 + 1 isotropic clover fermions on a lattice of L ≈ 3.6 fm and a pion mass of ≈ 320 MeV; for the b-quark we use the anisotropic clover action. After a brief overview of the theoretical framework, we will discuss some preliminary results.

Original language	English (US)
Article number	416
Journal	Proceedings of Science
Volume	430
State	Published - Apr 6 2023
Externally published	Yes
Event	39th International Symposium on Lattice Field Theory, LATTICE 2022 - Bonn, Germany Duration: Aug 8 2022 → Aug 13 2022

ASJC Scopus subject areas

General

Cite this

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title = "A lattice QCD study of the B → ππℓ(equation presented) transition",

abstract = "Vub is the smallest and least known of all CKM matrix elements; the community currently determines its magnitude primarily through the exclusive process B → πℓ(equation presented). Here we present our progress toward a lattice QCD determination of the Vub matrix element from a novel transition - the B → ππℓ(equation presented) process, where the ππ system is in a P wave and scattering features the ρ(770) resonance as an enhancement. We perform our calculation on Nf = 2 + 1 isotropic clover fermions on a lattice of L ≈ 3.6 fm and a pion mass of ≈ 320 MeV; for the b-quark we use the anisotropic clover action. After a brief overview of the theoretical framework, we will discuss some preliminary results.",

author = "Luka Leskovec and Stefan Meinel and Marcus Petschlies and John Negele and Srijit Paul and Andrew Pochinsky and Gumaro Rendon",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).; 39th International Symposium on Lattice Field Theory, LATTICE 2022 ; Conference date: 08-08-2022 Through 13-08-2022",

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T1 - A lattice QCD study of the B → ππℓ(equation presented) transition

AU - Leskovec, Luka

AU - Meinel, Stefan

AU - Petschlies, Marcus

AU - Negele, John

AU - Paul, Srijit

AU - Pochinsky, Andrew

AU - Rendon, Gumaro

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

PY - 2023/4/6

Y1 - 2023/4/6

N2 - Vub is the smallest and least known of all CKM matrix elements; the community currently determines its magnitude primarily through the exclusive process B → πℓ(equation presented). Here we present our progress toward a lattice QCD determination of the Vub matrix element from a novel transition - the B → ππℓ(equation presented) process, where the ππ system is in a P wave and scattering features the ρ(770) resonance as an enhancement. We perform our calculation on Nf = 2 + 1 isotropic clover fermions on a lattice of L ≈ 3.6 fm and a pion mass of ≈ 320 MeV; for the b-quark we use the anisotropic clover action. After a brief overview of the theoretical framework, we will discuss some preliminary results.

AB - Vub is the smallest and least known of all CKM matrix elements; the community currently determines its magnitude primarily through the exclusive process B → πℓ(equation presented). Here we present our progress toward a lattice QCD determination of the Vub matrix element from a novel transition - the B → ππℓ(equation presented) process, where the ππ system is in a P wave and scattering features the ρ(770) resonance as an enhancement. We perform our calculation on Nf = 2 + 1 isotropic clover fermions on a lattice of L ≈ 3.6 fm and a pion mass of ≈ 320 MeV; for the b-quark we use the anisotropic clover action. After a brief overview of the theoretical framework, we will discuss some preliminary results.

UR - https://www.scopus.com/pages/publications/85153210212

UR - https://www.scopus.com/pages/publications/85153210212#tab=citedBy

M3 - Conference article

AN - SCOPUS:85153210212

SN - 1824-8039

VL - 430

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 416

T2 - 39th International Symposium on Lattice Field Theory, LATTICE 2022

Y2 - 8 August 2022 through 13 August 2022

ER -

A lattice QCD study of the B → ππℓ(equation presented) transition

Abstract

ASJC Scopus subject areas

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