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Charged Kaon Mass Measurement using the Cherenkov Effect

Description: The two most recent and precise measurements of the charged kaon mass use X-rays from kaonic atoms and report uncertainties of 14 ppm and 22 ppm yet differ from each other by 122 ppm. We describe the possibility of an independent mass measurement using the measurement of Cherenkov light from a narrow-band beam of kaons, pions, and protons. This technique was demonstrated using data taken opportunistically by the Main Injector Particle Production experiment at Fermi National Accelerator Laboratory which recorded beams of protons, kaons, and pions ranging in momentum from +37 GeV/c to +63 GeV/c. The measured value is 491.3 {+-} 1.7 MeV/c{sup 2}, which is within 1.4{sigma} of the world average. An improvement of two orders of magnitude in precision would make this technique useful for resolving the ambiguity in the X-ray data and may be achievable in a dedicated experiment.
Date: September 1, 2009
Creator: Graf, N.; U., /Indiana; Lebedev, A.; /Harvard U., Phys. Dept.; Abrams, R.J.; U., /Michigan et al.
Partner: UNT Libraries Government Documents Department

Measurement of the charged kaon mass with the MIPP RICH

Description: The currently accepted value of the charged kaon mass is 493.677 {+-} 0.013 MeV (26 ppm). It is a weighted average of six measurements, most of which use kaonic atom X-ray energy techniques. The two most recent and precise results dominate the average but differ by 122 ppm. Inconsistency in the data set needs to be resolved, preferably using independent techniques. One possibility uses the Cherenkov effect. A measurement of the charged kaon mass using this technique is presented. The data was taken with the Main Injector Particle Production experiment at Fermi National Accelerator Laboratory using a tagged beam of protons, kaons, and pions ranging in momentum from 37 GeV/c to 63 GeV/c. The measured value is 491.3 {+-} 1.7 MeV. This is within 1.4{sigma} of the current value. An improvement in precision by a factor of 35 would make this technique competitive for resolving the ambiguity in the X-ray data.
Date: August 1, 2008
Creator: Graf, Nicholas J.
Partner: UNT Libraries Government Documents Department

Nuclear physics with stopping kaon beams

Description: The present status of thc study of hadronic atoms using stopping kaon beams is reviewed. The kaonic atom system is chiefly discussed. Kaon - nucleus interactions from x rays, nuclear gamma rays, and electromagnetic interactions are covered. (JFP)
Date: July 1, 1973
Creator: Barnes, P. D.
Partner: UNT Libraries Government Documents Department

Exotic atoms and leptonic conservations. Technical progress report, February 1, 1990--January 31, 1991

Description: The major 1989 efforts have been on two aspects of experiments at TRIUMF. One effort was production of muonic hydrogen and muonic deuterium into a vacuum. The study includes rates relevant to muon-catalyzed fusion, and if there are found an adequate number of muons in the 2-S state, then precision energies will be measured. The second effort was to develop plans for kaonic atoms at the kaon factory. In addition, analyses from the experiments with pionic atoms at LAMPF were completed.
Date: December 31, 1991
Creator: Kunselman, R.
Partner: UNT Libraries Government Documents Department

Kaon mass by critical absorption of kaonic atom x rays

Description: The energy of the kaonic 6h ..-->.. 5g transition has been determined using the calculated ..mu../rho curve. Because the detectors used could not resolve the noncircular transitions, the predictions from a calculated cascade program were used. According to the cascade results for potassium, the number of noncircular x-rays was about 10% of all the transitions between n = 6 to n = 5. Based on the available information, the mass of the kaon was measured to be 493.576/sub -0.069//sup +0.044/ MeV. (GHT)
Date: October 1, 1979
Creator: Lum, G.K.
Partner: UNT Libraries Government Documents Department

Exotic atoms and leptonic conservations. [Univ. of Wyoming, Laramie, Wyoming]

Description: The major 1989 efforts have been on two aspects of experiments at TRIUMF. One effort was production of muonic hydrogen and muonic deuterium into a vacuum. The study includes rates relevant to muon-catalyzed fusion, and if there are found an adequate number of muons in the 2-S state, then precision energies will be measured. The second effort was to develop plans for kaonic atoms at the kaon factory. In addition, analyses from the experiments with pionic atoms at LAMPF were completed.
Date: January 1, 1991
Creator: Kunselman, R.
Partner: UNT Libraries Government Documents Department

Exotic atoms and leptonic conservations

Description: The major 1989 efforts have been on two aspects of experiments at TRIUMF. One effort was production of muonic hydrogen and muonic deuterium into a vacuum. We study rates relevant to muonic catalyzed fusion, and if there are found an adequate number of muons in the 2s state then we plan to measure precision energies. The second effort was to develop plans for kaonic atoms at the kaon factory. We also completed analyses from the experiments with pionic atoms at LAMPF.
Date: January 1, 1990
Creator: Kunselman, R.
Partner: UNT Libraries Government Documents Department

A Cloudy Quark Bag Model of S, P, and D wave interactions for the coupled channel antikaon-nucleon system

Description: The Cloudy Quark Bag Model is extended from S-wave to P- and D-wave. The parameters of the model are determined by K{sup {minus}}p scattering cross section data, K{sup {minus}}p {yields}{Sigma}{pi}{pi}{pi} production data, K{sup {minus}}p threshold branching ratio data, and K{sup {minus}}p {yields}{Lambda}{pi}{pi}{pi} production data. The resonance structure of the {Lambda}(1405), {Sigma}(1385), and {Lambda}(1520) are studied in the model. The shift and width of kaonic hydrogen are calculated using the model.
Date: May 15, 1992
Creator: He, Guangliang
Partner: UNT Libraries Government Documents Department

K/sup -/ hydrogen bound and continuum states in momentum space

Description: The plan for this talk is to start off with a short discussion of the anti K N interaction and then proceed to a brief discussion of the kaon-nucleus interaction (these problems are not isolated). We then discuss the recent K/sup -/p atom experiment and related phenomenology. This leads us to the heart of this talk, calculations with the momentum space Schroedinger equation including both the Coulomb and nuclear forces when both open and closed channels are present. We end with a comparison of the results of these calculations with experiment. 19 refs.
Date: January 1, 1985
Creator: Landau, R.H.
Partner: UNT Libraries Government Documents Department