Combination of KLOE σ (<i>e</i><SUP>+</SUP> <i>e</i><SUP>-</SUP> → π<SUP>+</SUP>π<SUP>-</SUP> γ(γ)) measurements and determination of <i>a</i>_μ<SUP>π+π-</SUP> in the energy range 0.10 &lt; <i>s</i> &lt; 0.95 GeV<SUP>2</SUP>

Collapse authors list.
Anastasi, A, Babusci, D, Berlowski, M, Bloise, C, Bossi, F, Branchini, P, Budano, A, Balkestahl, L Caldeira, Cao, B, Ceradini, F et al (show 54 more authors) , Ciambrone, P, Curciarello, F, Czerwinski, E, D'Agostini, G, Dane, E, De Leo, V, De Lucia, E, De Santis, A, De Simone, P, Di Cicco, A, Di Domenico, A, Domenici, D, D'Uffizi, A, Fantini, A, Fantini, G, Fermani, P, Fiore, S, Gajos, A, Gauzzi, P, Giovannella, S, Graziani, E, Ivanov, VL, Johansson, T, Kang, X, Kisielewska-Kaminska, D, Kozyrev, EA, Krzemien, W, Kupsc, A, Loffredo, S, Lukin, PA, Mandaglio, G, Martini, M, Messi, R, Miscetti, S, Morello, G, Moricciani, D, Moskal, P, Passeri, A, Patera, V, del Rio, E Perez, Raha, N, Santangelo, P, Schioppa, M, Selce, A, Silarski, M, Sirghi, F, Solodov, EP, Tortora, L, Venanzoni, G ORCID: 0000-0002-3525-476X, Wislicki, W, Wolke, M, Keshavarzi, A ORCID: 0000-0001-9085-7283, Mueller, SE and Teubner, T ORCID: 0000-0002-0680-0776 (2018) Combination of KLOE σ (<i>e</i><SUP>+</SUP> <i>e</i><SUP>-</SUP> → π<SUP>+</SUP>π<SUP>-</SUP> γ(γ)) measurements and determination of <i>a</i>_μ<SUP>π+π-</SUP> in the energy range 0.10 &lt; <i>s</i> &lt; 0.95 GeV<SUP>2</SUP>. JOURNAL OF HIGH ENERGY PHYSICS, 2018 (3). 173-.

Access the full-text of this item by clicking on the Open Access link.

Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>The three precision measurements of the cross section <jats:italic>σ</jats:italic>(<jats:italic>e</jats:italic> <jats:sup>+</jats:sup> <jats:italic>e</jats:italic> <jats:sup>−</jats:sup> → <jats:italic>π</jats:italic> <jats:sup>+</jats:sup> <jats:italic>π</jats:italic> <jats:sup>−</jats:sup>γ(γ)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for <jats:italic>σ</jats:italic>(<jats:italic>e</jats:italic> <jats:sup>+</jats:sup> <jats:italic>e</jats:italic> <jats:sup>−</jats:sup> → <jats:italic>π</jats:italic> <jats:sup>+</jats:sup> <jats:italic>π</jats:italic> <jats:sup>−</jats:sup>γ(γ)). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0<jats:italic>.</jats:italic>10 <jats:italic>&lt; s &lt;</jats:italic> 0<jats:italic>.</jats:italic>95 GeV<jats:sup>2</jats:sup> of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {a}_{\mu}^{\pi^{+}{\pi}^{-}}=\left(489.8\pm {1.7}_{\mathrm{stat}}\pm {4.8}_{\mathrm{sys}}\right)\times {10}^{-10} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>a</mml:mi> <mml:mi>μ</mml:mi> <mml:mrow> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:mrow> </mml:msubsup> <mml:mo>=</mml:mo> <mml:mfenced> <mml:mrow> <mml:mn>489.8</mml:mn> <mml:mo>±</mml:mo> <mml:msub> <mml:mn>1.7</mml:mn> <mml:mi>stat</mml:mi> </mml:msub> <mml:mo>±</mml:mo> <mml:msub> <mml:mn>4.8</mml:mn> <mml:mrow> <mml:mi>s</mml:mi> <mml:mi>y</mml:mi> <mml:mi>s</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> </mml:mfenced> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>10</mml:mn> </mml:mrow> </mml:msup> </mml:math> </jats:alternatives> </jats:inline-formula>.</jats:p> <jats:p>Data vectors and covariance matrices are available at <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.lnf.infn.it/kloe/ppg/ppg_2017/ppg_2017.html" ext-link-type="uri">http://www.lnf.infn.it/kloe/ppg/</jats:ext-link> <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://www.lnf.infn.it/kloe/ppg/ppg_2017/ppg_2017.html" ext-link-type="uri">ppg_2017/ppg_2017.html</jats:ext-link>.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	e plus -e- Experiments
Depositing User:	Symplectic Admin
Date Deposited:	25 Jul 2018 06:38
Last Modified:	14 Mar 2024 18:02
DOI:	10.1007/JHEP03(2018)173
Open Access URL:	https://link.springer.com/article/10.1007/JHEP03(2...
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3024127