Input argument

ICLASS

Class = KRECO or KMONTE or a Lorentz frame identifier (see 7.4.1). If ICLASS is KRECO, note that initially all charged particles have the pion mass and all neutral objects have mass = 0. This can be modified by CALL QVSETM (see 9.2.13). If ICLASS refers to a Lorentz frame, particles not boosted into the frame are ignored without notification. The routine QTCLAS (see 9.6.3) performs a Lorentz transformation of all tracks belonging to a class. If a particle has been boosted several times into the same frame, the most recently boosted hypothesis will be used (see remarks in 7.4.5).