2-7 May 2010
Oustau Calendal Conference Center
Europe/Paris timezone

Measuring the masses of the charged hadrons using a RICH as a precision velocity spectrometer

6 May 2010, 11:45
Oustau Calendal Conference Center

Oustau Calendal Conference Center

Cassis, France
Oral presentation Pattern recognition and data analysis Pattern recognition and data analysis


Peter Cooper (Fermilab)


The Selex experiment measured several billion charged hadron tracks with a high precision magnetic momentum spectrometer and high precision RICH velocity spectrometer. We have analyzed these data to simultaneously measure the masses of all the long lived charged hadrons and anti-hadrons from the pion to the Omega- using the same detectors and techniques. The statistical precision achievable with this data sample is effectively unlimited. We have used these measurements to develop and understand the systematic effects of a RICH as a precision velocity spectrometer with the goal of measuring all 16 masses with precision ranging from 100 KeV for the lightest to 1000 KeV for the heaviest. This requires controlling the radius measurement of RICH rings to the dR/R~10^-4 level. Progress in the mass measurements and the required RICH analysis techniques developed will be discussed.
Please indicate "poster" or "plenary" session. Final decision will be made by session coordinators. plenary

Primary author

Peter Cooper (Fermilab)


Jürgen Engelfried (Instituto de Fisica, Universidad Autonoma de San Luis Potosi)

Presentation Materials