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Sea quark effects in BK from Nf = 2 clover-improved Wilson fermions

Sea quark effects in BK from Nf = 2 clover-improved Wilson fermions
Sea quark effects in BK from Nf = 2 clover-improved Wilson fermions
We report calculations of the parameter BK appearing in the ΔS = 2 neutral kaon mixing matrix element, whose uncertainty limits the power of unitarity triangle constraints for testing the standard model or looking for new physics. We use two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical quark mass at fixed lattice spacing. We see some evidence for dynamical quark effects and in particular BK decreases as the sea quark masses are reduced towards the up/down quark mass.
quark masses and sm parameters, kaon physics, lattice qcd
1-15
Flynn, Jonathan M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Mescia, Federico
421ce344-a52a-4a1c-acae-99a61d081447
Tariq, Abdullah Shams Bin
3a494210-7329-450d-af90-181aa6f85ed5
UKQCD Collaboration
Flynn, Jonathan M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Mescia, Federico
421ce344-a52a-4a1c-acae-99a61d081447
Tariq, Abdullah Shams Bin
3a494210-7329-450d-af90-181aa6f85ed5

Flynn, Jonathan M., Mescia, Federico and Tariq, Abdullah Shams Bin , UKQCD Collaboration (2004) Sea quark effects in BK from Nf = 2 clover-improved Wilson fermions. Journal of High Energy Physics, 11 (49), 1-15. (doi:10.1088/1126-6708/2004/11/049).

Record type: Article

Abstract

We report calculations of the parameter BK appearing in the ΔS = 2 neutral kaon mixing matrix element, whose uncertainty limits the power of unitarity triangle constraints for testing the standard model or looking for new physics. We use two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical quark mass at fixed lattice spacing. We see some evidence for dynamical quark effects and in particular BK decreases as the sea quark masses are reduced towards the up/down quark mass.

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Published date: 11 December 2004
Keywords: quark masses and sm parameters, kaon physics, lattice qcd
Organisations: Physics & Astronomy
Learn more about Physics & Astronomy research

Identifiers

Local EPrints ID: 12661
URI: http://eprints.soton.ac.uk/id/eprint/12661
DOI: doi:10.1088/1126-6708/2004/11/049
PURE UUID: 00a8eef0-8d22-4115-b3de-766fd6d2c1d3
ORCID for Jonathan M. Flynn: ORCID iD orcid.org/0000-0002-6280-1677

Catalogue record

Date deposited: 31 Dec 2004
Last modified: 16 Mar 2024 02:44

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Contributors

Author: Jonathan M. Flynn ORCID iD
Author: Federico Mescia
Author: Abdullah Shams Bin Tariq
Corporate Author: UKQCD Collaboration

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