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First results on kaonic hydrogen from the DEAR experiment

Guaraldo, C. and Beer, G. and Bragadireanu, A. M. and Cargnelli, M. and Curceanu, C. and Egger, J.-P. and Fuhrman, H. and Iliescu, M. and Ishiwatari, T. and Itahashi, K. and Iwasaki, M. and Lauss, B. and Lucherini, V. and Ludhova, L. and Marton, J. and Mulhauser, F. and Ponta, T. and Schaller, L. A. and Seki, R. and Sirghi, D. and Sirghi, F. and Strasser, P. and Zmeskal, J. (2004) First results on kaonic hydrogen from the DEAR experiment. In: Perspectives in Hadronic Physics. Springer , Berlin, pp. 185-188. ISBN 978-3-642-62297-7.

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The objective of DEAR (DAφNE Exotic Atom Research) is the measurement of the K_a line shift and width, due to the strong interaction, in kaonic hydrogen and a similar measurement — the first one — in kaonic deuterium. The aim is a precision determination of the antikaon-nucleon isospin dependent scattering lengths in order to obtain the kaon nucleon sigma terms. In a first phase, dedicated to the calibration and optimization of the setup, the experiment collected data on kaonic nitrogen: for the first time a complex of three transitions (7 → 6 at 4.6 keV, 6 → 5 at 7.6 keV and 5→ 4 at 14 keV) was measured, and the corresponding yields obtained. The kaonic hydrogen measurement was performed for a total integrated luminosity of about 60 pb-1 in the last months of the 2002 year. Data analyses are in progress, preliminary results being hereby presented, together with those on kaonic nitrogen.

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Additional Information:© 2004 Springer-Verlag Berlin Heidelberg. Received: 29 Jul 2003; Accepted: 14 Nov 2003. The DAΦNE group in warmy acknowledged for the very good cooperation and team-work. Part of the work was supported by a "Transnational access to Research Infrastructure" (TARI) Contract No. HPRI-CT-1999-00088.
Funding AgencyGrant Number
Transnational access to Research InfrastructureHPRI-CT-1999-00088
Subject Keywords:Chiral Symmetry Breaking; Exotic Atom; Sigma Term; Kaonic Hydrogen; Meson Decay Constant
Classification Code:PACS: 36.10.-K; 36.10.Gv
Record Number:CaltechAUTHORS:20200318-133758171
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:101976
Deposited By: Tony Diaz
Deposited On:18 Mar 2020 21:21
Last Modified:16 Nov 2021 18:07

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