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

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 pi to the Omega using the same detector and technique. The statistical precision achievable with this data sample is more than adequate for 0.1% mass measurements 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 10 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 ~10^{-4} level. Progress in the mass measurements and the required RICH analysis techniques developed are discussed.Comment: Submitted to special edition of NIMA, Proceedings of RICh2010. v2 as accepted for publicatio

Review of Recent Results in Charm Physics

A biased review of recent results in charm physics is presented. New results on D0 anti-D0 mixing, rare decays of D0 and D+/-, scalar resonances in D+ and Ds decays, and new decay modes and mass measurements in Lambda_c, Xi_c, Omega_c, and Xi_cc are discussed.Comment: Invited talk the 9th International Conference on B-Physics at Hadron Machines - BEAUTY 2003, Carnegie Mellon University, Pittsburgh, October 14-18, 2003. Proceedings to be published by AI

Experimental Techniques

In this course we will give examples for experimental techniques used in particle physics experiments. After a short introduction, we will discuss applications in silicon microstrip detectors, wire chambers, and single photon detection in Ring Imaging Cherenkov (RICH) counters. A short discussion of the relevant physics processes, mainly different forms of energy loss in matter, is enclosed.Comment: 20 pages with 15 figures included. Course given at the VII Mexican Workshop on Particles and Fields, Merida, Yucatan, Mexico, November 10-17, 1999. Proceedings to be published by AI

Instrumentation

In this course, given at the school in 3 parts of 75 minutes each, we will discuss the physics of particle detection, the basic designs and working principles of detectors, and, as an example with more details, some detectors for particle identification.Comment: Lecture course given at the 2nd Latin American School of High Energy Physics, San Miguel Regla, Mexico, June 1-14, 2003. To be published in a CERN Yellow Repor

SELEX: Recent Progress in the Analysis of Charm-Strange and Double-Charm Baryons

We present recent progress in the analysis of the Omega_c^0, the Xi_cc^+ and the Xi_cc^++.Comment: Contribution to the proceedings of HQL06, Munich, October 16th-20th 200

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

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 pi to the Omega using the same detector and technique. The statistical precision achievable with this data sample is more than adequate for 0.1% mass measurements 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 10 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 ~10^{-4} level. Progress in the mass measurements and the required RICH analysis techniques developed are discussed.Comment: Submitted to special edition of NIMA, Proceedings of RICh2010. v2 as accepted for publicatio

The Main Injector Particle Physics Experiment (MIPP FNAL E-907) at Fermilab - status and plans

We describe the status of the Main Injector particle production Experiment (MIPP) at Fermilab which has to date acquired 18 million events of particle interactions using (5 GeV/c-120 GeV/c) $\pi^\pm, K^\pm$ and $p^\pm$ beams on various targets. We describe plans to upgrade the data acquisition speed of MIPP to make it run 100 times faster which will enable us to obtain particle production data of unprecdented quality and statistics on a wide variety of nuclear targets including nitrogen which is of importance to cosmic ray physics.Comment: 8 pages 11 figures To appear in the proceedings of the XIV International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 2006), Weihai, China, on August 15-22, 200

SELEX RICH Performance and Physics Results

SELEX took data in the 1996/7 Fixed Target Run at Fermilab. The excellent performance parameters of the SELEX RICH Detector had direct influence on the quality of the obtained physics results.Comment: Contributed talk at the Fourth Workshop on RICH Detectors, June 5-10, 2002, Pylos, Greece. Accepted for publication in NIM