dorsal/arxiv
View SchemaThe Paschos-Wolfenstein relation in a hadronic picture
| Authors | C. Praet, N. Jachowicz, J. Ryckebusch, P. Vancraeyveld, K. Vantournhout |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0603047 |
| URL | https://arxiv.org/abs/nucl-th/0603047 |
| DOI | 10.1103/PhysRevC.74.065501 |
| Journal | Phys.Rev.C74:065501,2006 |
Abstract
The Paschos-Wolfenstein (PW) relation joins neutral- and charged-current neutrino- and antineutrino-induced cross sections into an expression that depends on the weak mixing angle $\sin^2 \theta_W$. Contrary to the traditional approach with partonic degrees of freedom, we adopt a model built on hadronic degrees of freedom to perform a study of the PW relation at intermediate energies (100 MeV to 2 GeV). With upcoming high-statistics scattering experiments such as MINER$\nu$A and FINeSSE, a scrutiny of the PW relation is timely. Employing a relativistic Glauber nucleon knockout model for the description of quasielastic neutrino-nucleus reactions, the influence of nuclear effects on the PW relation is investigated. We discuss nuclear-model dependences and show that the PW relation is a robust ratio, mitigating the effect of final-state interactions, for example to the 1% level. The role played by a possible strangeness content of the nucleon is investigated. It appears that the uncertainties arising from the poorly known strangeness parameters and the difficulties in nuclear modelling seriously limit the applicability of the PW relation as an intermediate-energy electroweak precision tool. On the other hand, we show that nuclear effects may be sufficiently well under control to allow the extraction of new information on the axial strangeness parameter. Results are presented for $^{16} {O}$ and $^{56} {Fe}$.
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"abstract": "The Paschos-Wolfenstein (PW) relation joins neutral- and charged-current\nneutrino- and antineutrino-induced cross sections into an expression that\ndepends on the weak mixing angle $\\sin^2 \\theta_W$. Contrary to the traditional\napproach with partonic degrees of freedom, we adopt a model built on hadronic\ndegrees of freedom to perform a study of the PW relation at intermediate\nenergies (100 MeV to 2 GeV). With upcoming high-statistics scattering\nexperiments such as MINER$\\nu$A and FINeSSE, a scrutiny of the PW relation is\ntimely. Employing a relativistic Glauber nucleon knockout model for the\ndescription of quasielastic neutrino-nucleus reactions, the influence of\nnuclear effects on the PW relation is investigated. We discuss nuclear-model\ndependences and show that the PW relation is a robust ratio, mitigating the\neffect of final-state interactions, for example to the 1% level. The role\nplayed by a possible strangeness content of the nucleon is investigated. It\nappears that the uncertainties arising from the poorly known strangeness\nparameters and the difficulties in nuclear modelling seriously limit the\napplicability of the PW relation as an intermediate-energy electroweak\nprecision tool. On the other hand, we show that nuclear effects may be\nsufficiently well under control to allow the extraction of new information on\nthe axial strangeness parameter. Results are presented for $^{16} {O}$ and\n$^{56} {Fe}$.",
"arxiv_id": "nucl-th/0603047",
"authors": [
"C. Praet",
"N. Jachowicz",
"J. Ryckebusch",
"P. Vancraeyveld",
"K. Vantournhout"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.74.065501",
"journal_ref": "Phys.Rev.C74:065501,2006",
"title": "The Paschos-Wolfenstein relation in a hadronic picture",
"url": "https://arxiv.org/abs/nucl-th/0603047"
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