|Title: ||New tests for experiments producing pentaquarks.|
|Authors: ||Karliner, Marek|
Lipkin, Harry J
|Issue Date: ||Jan-2005|
|Publisher: ||HEP, Cavendish Laboratory, University of Cambridge|
|Series/Report no.: ||Cavendish-HEP-05-04|
|Abstract: ||The distribution of the squared momentum difference |PA|2 − |PB|2 between
the momenta in the laboratory system of two experimentally observed particles
A and B provides a test for whether an observed mass peak indicates
a real resonance rather than nonresonant background or kinematic reflection.
The angular distribution of the relative momenta in the center-of-mass system
exhibits a forward-backward symmetry in the production and decay of
any resonance with a definite parity. This symmetry is not expected in other
nonresonant processes and can be expressed without needing angular distributions
in terms of the easily measured momenta in the laboratory frame that
are already measured and used to calculate the invariant mass of the system.
Our test is especially useful for low statistics experiments where the full angular
distribution cannot be determined. It can be applied to both fixed-target
and collider searches for the + and c pentaquarks|
|Appears in Collections:||Scholarly works - High Energy Physics|
This item has been accessed 268 times.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.