Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/77540
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Type: | Conference paper |
Title: | Strange quark content of the nucleon and dark matter searches |
Author: | Young, R. |
Citation: | PoS (Lattice 2012); 014 |
Publisher: | Proceedings of Science |
Publisher Place: | Italy |
Issue Date: | 2012 |
ISSN: | 1824-8039 |
Conference Name: | International Symposium on Lattice Field Theory (30th : 2012 : Cairns, Australia) |
Statement of Responsibility: | R. D. Young |
Abstract: | The strange quark scalar content plays an important role in both the description of nucleon structure and in the determination of dark matter direct detection cross sections. As a measure of the strange-quark contribution to the nucleon mass, the strange-quark sigma term (ss) provides important insight into the nature of mass generation in QCD. The phenomenological determination of ss exhibits a wide range of variation, with values suggesting that the strange quark contributes anywhere between 0 and more than 30% of the nucleon mass. In the context of dark matter searches, coupled with relatively large Higgs coupling to strangeness, this variation dominates the uncertainty in predicted cross sections for a large class of dark matter models. Here we report on the recent results in lattice QCD, which are now giving a far more precise determination of ss than can be inferred from phenomenology. As a consequence, the lattice determinations of ss can now dramatically reduce the uncertainty in dark matter cross sections associated with the hadronic matrix elements. |
Description: | Extent: 12p. |
Rights: | © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence |
DOI: | 10.22323/1.164.0014 |
Description (link): | http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=164 |
Published version: | http://pos.sissa.it/archive/conferences/164/014/Lattice%202012_014.pdf |
Appears in Collections: | Aurora harvest Special Research Centre for the Subatomic Structure of Matter publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_77540.pdf | Published version | 1.49 MB | Adobe PDF | View/Open |
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