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Title: Novel | V u s | Determination Using Inclusive Strange τ Decay and Lattice Hadronic Vacuum Polarization Functions

Abstract

We propose and apply a new approach to determining |V us| using dispersion relations with weight functions having poles at Euclidean (spacelike) momentum which relate strange hadronic τ decay distributions to hadronic vacuum polarization (HVP) functions obtained from lattice quantum chromodynamics. We show examples where spectral integral contributions from the region where experimental data have large errors or do not exist are strongly suppressed but accurate determinations of the relevant lattice HVP combinations remain possible. The resulting |V us| agrees well with determinations from K physics and three-family Cabibbo-Kobayashi-Maskawa unitarity. Finally, advantages of this new approach over the conventional hadronic τ decay determination employing flavor-breaking sum rules are also discussed.

Authors:
 [1];  [2];  [3];  [4];  [5];  [2];  [6];  [7];  [8];  [8]
  1. Univ. of Edinburgh, Scotland (United Kingdom). SUPA, School of Physics
  2. York Univ., Toronto, ON (Canada)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center, and Physics Dept.
  4. Univ. of Southampton (United Kingdom). School of Physics and Astronomy
  5. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.
  6. York Univ., Toronto, ON (Canada); Univ. of Adelaide, SA (Australia). Centre for the Subatomic Structure of Matter (CSSM)
  7. Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center; Nara Women’s Univ., Nara (Japan). Dept. of Physics
  8. Univ. of Edinburgh, Scotland (United Kingdom). School of Physics and Astronomy
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
RBC and UKQCD Collaborations
OSTI Identifier:
1482416
Alternate Identifier(s):
OSTI ID: 1485774
Report Number(s):
BNL-209737-2018-JAAM
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 20; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HVP; lattice; QCD; Tau; OPE; hadronic; Vus; EFT; polarization; UKQCD; RBC; CKM; electroweak

Citation Formats

Boyle, Peter, Hudspith, Renwick James, Izubuchi, Taku, Jüttner, Andreas, Lehner, Christoph, Lewis, Randy, Maltman, Kim, Ohki, Hiroshi, Portelli, Antonin, and Spraggs, Matthew. Novel |Vus| Determination Using Inclusive Strange τ Decay and Lattice Hadronic Vacuum Polarization Functions. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.202003.
Boyle, Peter, Hudspith, Renwick James, Izubuchi, Taku, Jüttner, Andreas, Lehner, Christoph, Lewis, Randy, Maltman, Kim, Ohki, Hiroshi, Portelli, Antonin, & Spraggs, Matthew. Novel |Vus| Determination Using Inclusive Strange τ Decay and Lattice Hadronic Vacuum Polarization Functions. United States. doi:10.1103/PhysRevLett.121.202003.
Boyle, Peter, Hudspith, Renwick James, Izubuchi, Taku, Jüttner, Andreas, Lehner, Christoph, Lewis, Randy, Maltman, Kim, Ohki, Hiroshi, Portelli, Antonin, and Spraggs, Matthew. Fri . "Novel |Vus| Determination Using Inclusive Strange τ Decay and Lattice Hadronic Vacuum Polarization Functions". United States. doi:10.1103/PhysRevLett.121.202003.
@article{osti_1482416,
title = {Novel |Vus| Determination Using Inclusive Strange τ Decay and Lattice Hadronic Vacuum Polarization Functions},
author = {Boyle, Peter and Hudspith, Renwick James and Izubuchi, Taku and Jüttner, Andreas and Lehner, Christoph and Lewis, Randy and Maltman, Kim and Ohki, Hiroshi and Portelli, Antonin and Spraggs, Matthew},
abstractNote = {We propose and apply a new approach to determining |Vus| using dispersion relations with weight functions having poles at Euclidean (spacelike) momentum which relate strange hadronic τ decay distributions to hadronic vacuum polarization (HVP) functions obtained from lattice quantum chromodynamics. We show examples where spectral integral contributions from the region where experimental data have large errors or do not exist are strongly suppressed but accurate determinations of the relevant lattice HVP combinations remain possible. The resulting |Vus| agrees well with determinations from K physics and three-family Cabibbo-Kobayashi-Maskawa unitarity. Finally, advantages of this new approach over the conventional hadronic τ decay determination employing flavor-breaking sum rules are also discussed.},
doi = {10.1103/PhysRevLett.121.202003},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 20,
volume = 121,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevLett.121.202003

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