skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: D-Meson Mixing in 2+1-Flavor Lattice QCD

Abstract

We present results for neutral D-meson mixing in 2+1-flavor lattice QCD. We compute the matrix elements for all five operators that contribute to D mixing at short distances, including those that only arise beyond the Standard Model. Our results have an uncertainty similar to those of the ETM collaboration (with 2 and with 2+1+1 flavors). This work shares many features with a recent publication on B mixing and with ongoing work on heavy-light decay constants from the Fermilab Lattice and MILC Collaborations.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [5];  [5]
  1. William-Mary Coll.
  2. Illinois U., Urbana
  3. Art Inst. of Chicago
  4. Granada U., Theor. Phys. Astrophys.
  5. Fermilab
  6. Syracuse U.
  7. Colorado U.
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
Fermilab Lattice; MILC
OSTI Identifier:
1347126
Report Number(s):
FERMILAB-CONF-17-017-T; arXiv:1701.05916
1510264
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: 34th International Symposium on Lattice Field Theory, Southampton, UK, 07/24-07/30/2016
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Chang, Chia Cheng, Bouchard, C. M., El-Khadra, A. X., Freeland, E., Gámiz, E., Kronfeld, A. S., Laiho, J. W., Neil, E. T., Simone, J. N., and Van de Water, R. S. D-Meson Mixing in 2+1-Flavor Lattice QCD. United States: N. p., 2017. Web.
Chang, Chia Cheng, Bouchard, C. M., El-Khadra, A. X., Freeland, E., Gámiz, E., Kronfeld, A. S., Laiho, J. W., Neil, E. T., Simone, J. N., & Van de Water, R. S. D-Meson Mixing in 2+1-Flavor Lattice QCD. United States.
Chang, Chia Cheng, Bouchard, C. M., El-Khadra, A. X., Freeland, E., Gámiz, E., Kronfeld, A. S., Laiho, J. W., Neil, E. T., Simone, J. N., and Van de Water, R. S. Fri . "D-Meson Mixing in 2+1-Flavor Lattice QCD". United States. doi:. https://www.osti.gov/servlets/purl/1347126.
@article{osti_1347126,
title = {D-Meson Mixing in 2+1-Flavor Lattice QCD},
author = {Chang, Chia Cheng and Bouchard, C. M. and El-Khadra, A. X. and Freeland, E. and Gámiz, E. and Kronfeld, A. S. and Laiho, J. W. and Neil, E. T. and Simone, J. N. and Van de Water, R. S.},
abstractNote = {We present results for neutral D-meson mixing in 2+1-flavor lattice QCD. We compute the matrix elements for all five operators that contribute to D mixing at short distances, including those that only arise beyond the Standard Model. Our results have an uncertainty similar to those of the ETM collaboration (with 2 and with 2+1+1 flavors). This work shares many features with a recent publication on B mixing and with ongoing work on heavy-light decay constants from the Fermilab Lattice and MILC Collaborations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 20 00:00:00 EST 2017},
month = {Fri Jan 20 00:00:00 EST 2017}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • We report on the status of our calculation of the hadronic matrix elements for neutralmore » $B$-meson mixing with asqtad sea and valence light quarks and using the Wilson clover action with the Fermilab interpretation for the $b$ quark. We calculate the matrix elements of all five local operators that contribute to neutral $B$-meson mixing both in and beyond the Standard Model. We use MILC ensembles with $$N_f=2+1$$ dynamical flavors at four different lattice spacings in the range $$a \approx 0.045$$--$0.12$~fm, and with light sea-quark masses as low as 0.05 times the physical strange quark mass. We perform a combined chiral-continuum extrapolation including the so-called wrong-spin contributions in simultaneous fits to the matrix elements of the five operators. We present a complete systematic error budget and conclude with an outlook for obtaining final results from this analysis.« less
  • We present a calculation of themore » $$D\to K \ell \nu$$ and $$D\to\pi \ell \nu$$ semileptonic form factors at $q^2=0$, which enable determinations of the CKM matrix elements $$\lvert{V_{cs}}\rvert$$ and $$\lvert{V_{cd}}\rvert$$, respectively. We use gauge-field configurations generated by the MILC collaboration with four flavors of highly-improved staggered (HISQ) quarks, analyzing several ensembles including those with physical pion masses and approximate lattice spacings ranging from 0.12~fm to 0.042~fm. We also use the HISQ action for the valence quarks. We employ twisted boundary conditions to calculate the form factors at zero momentum transfer directly. We use heavy-light-meson chiral perturbation theory modified for energetic pions and kaons, and supplemented by terms to describe the lattice-spacing dependence, to obtain preliminary results at the physical point and in the continuum limit.« less
  • We present an update of the Fermilab-MILC Collaboration's calculation of hadronic matrix elements for B^0-\bar{B^0} mixing. This work is a more extended analysis than our recent publication of the SU(3)-breaking ratio xi [arXiv:1205.7013]. We use the asqtad staggered action for light valence quarks in combination with the Fermilab interpretation of the Sheikoleslami-Wohlert action for heavy quarks. The calculations use MILC's 2+1 flavor asqtad ensembles. Ensembles include four lattice spacings from approximately 0.125 fm to 0.045 fm and up/down to strange quark mass ratios as low as 0.05. Our calculation covers the complete set of five operators needed to describe Bmore » mixing in the Standard Model and beyond. In addition to an update including a fuller set of analyzed data, we comment on the form of the staggered ChPT extrapolation function.« less