Consider two halfspaces
MFLOGP, a new method for determining a single component octanol–water partition coefficients (
 Award ID(s):
 2021871
 NSFPAR ID:
 10391990
 Publisher / Repository:
 Springer Science + Business Media
 Date Published:
 Journal Name:
 Journal of Cheminformatics
 Volume:
 15
 Issue:
 1
 ISSN:
 17582946
 Format(s):
 Medium: X
 Sponsoring Org:
 National Science Foundation
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Abstract We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive
meson muoproduction at COMPASS using 160 GeV/$$\rho ^0$$ ${\rho}^{0}$c polarised and$$ \mu ^{+}$$ ${\mu}^{+}$ beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0 GeV/$$ \mu ^{}$$ ${\mu}^{}$$$c^2$$ ${c}^{2}$ 17.0 GeV/$$< W<$$ $<W<$ , 1.0 (GeV/$$c^2$$ ${c}^{2}$c )$$^2$$ ${}^{2}$ 10.0 (GeV/$$< Q^2<$$ $<{Q}^{2}<$c ) and 0.01 (GeV/$$^2$$ ${}^{2}$c )$$^2$$ ${}^{2}$ 0.5 (GeV/$$< p_{\textrm{T}}^2<$$ $<{p}_{\text{T}}^{2}<$c ) . Here,$$^2$$ ${}^{2}$W denotes the mass of the final hadronic system, the virtuality of the exchanged photon, and$$Q^2$$ ${Q}^{2}$ the transverse momentum of the$$p_{\textrm{T}}$$ ${p}_{\text{T}}$ meson with respect to the virtualphoton direction. The measured nonzero SDMEs for the transitions of transversely polarised virtual photons to longitudinally polarised vector mesons ($$\rho ^0$$ ${\rho}^{0}$ ) indicate a violation of$$\gamma ^*_T \rightarrow V^{ }_L$$ ${\gamma}_{T}^{\ast}\to {V}_{L}^{}$s channel helicity conservation. Additionally, we observe a dominant contribution of naturalparityexchange transitions and a very small contribution of unnaturalparityexchange transitions, which is compatible with zero within experimental uncertainties. The results provide important input for modelling Generalised Parton Distributions (GPDs). In particular, they may allow one to evaluate in a modeldependent way the role of parton helicityflip GPDs in exclusive production.$$\rho ^0$$ ${\rho}^{0}$ 
Abstract The electric
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