Imperial College London
Professor Leader

Professor Leader

Faculty of Natural Sciences, Department of Physics

Senior Research Investigator
 
 
 
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Contact

 

+44 (0)20 7594 7792e.leader Website

 
 
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Assistant

 

Ms Paula Brown +44 (0)20 7594 7823

 
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Location

 

504Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Christova:2018:10.1103/PhysRcvD.97.056018,
author = {Christova, E and Leader, E and Stoilov, M},
doi = {10.1103/PhysRcvD.97.056018},
journal = {Physical Review D - Particles, Fields, Gravitation and Cosmology},
title = {Consistency tests for the extraction of the Boer-Mulders and Sivers functions},
url = {http://dx.doi.org/10.1103/PhysRcvD.97.056018},
volume = {97},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - At present, the Boer-Mulders (BM) function for a given quark flavor is extracted from data on semi-inclusive deep inelastic scattering (SIDIS) using the simplifying assumption that it is proportional to the Sivers function for that flavor. In a recent paper, we suggested that the consistency of this assumption could be tested using information on so-called difference asymmetries i.e. the difference between the asymmetries in the production of particles and their antiparticles. In this paper, using the SIDIS COMPASS deuteron data on the cosh, cos2h and Sivers difference asymmetries, we carry out two independent consistency tests of the assumption of proportionality, but here applied to the sum of the valence-quark contributions. We find that such an assumption is compatible with the data. We also show that the proportionality assumptions made in the existing parametrizations of the BM functions are not compatible with our analysis, which suggests that the published results for the Boer-Mulders functions for individual flavors are unreliable. The cosh and cos2h asymmetries receive contributions also from the, in principle, calculable Cahn effect. We succeed in extracting the Cahn contributions from experiment (we believe for the first time) and compare with their calculated values, with interesting implications.
AU  - Christova,E
AU  - Leader,E
AU  - Stoilov,M
DO  - 10.1103/PhysRcvD.97.056018
PY  - 2018///
SN  - 1550-2368
TI  - Consistency tests for the extraction of the Boer-Mulders and Sivers functions
T2  - Physical Review D - Particles, Fields, Gravitation and Cosmology
UR  - http://dx.doi.org/10.1103/PhysRcvD.97.056018
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000428390100003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/58788
VL  - 97
ER  -
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