ALPHA ``TRACKS'' :

ALPHA ``tracks'' are stored in the internal ALPHA bank QVEC.

Charged Tracks: KFCHT, KLCHT, KNCHT

If the FRF0 card is present in the ALPHA cards file, the NR=0 version of the FRFT bank (track parameters determined without vertex detector coordinates) will be used. Otherwise, the NR=2 version of FRFT (TPC + ITC + VDET tracks) will be used. Only FRFT NR=2 tracks are available on the MiniDST.

Calorimeter Objects: KFCOT, KLCOT, KNCOT

For physics analysis with optimised energy resolution, one should better use the Energy Flow objects (see below).

Calorimeter objects can be any of the following:

• ECAL objects with no associated HCAL object.
• HCAL objects with no associated ECAL object.
• Composite cal. objects consisting of at least one ECAL and HCAL object associated to each other. See 7.2 for getting access to the contributing ECAL and HCAL objects separately. See the end of Section 7.3 for a more detailed description of composite cal. objects in ALPHA.
Calorimeter objects can be further divided into:

ISolated cal. objects: KFlST, KLIST, KNIST

Cal objects with NO associated charged track.

ASsociated cal. objects: KFAST, KLAST, KNAST

Cal objects with one or more associated charged track.

``REconstructed'' objects: KFRET, KLRET, KNRET

``REconstructed'' objects are:

• Charged tracks;
• Calorimeter objects (see above) which are NOT associated to charged tracks (ISolated cal. objects).

Reconstructed Standard V0s from YV0V: KFV0T, KLV0T, KNV0T

See Section 7.5.1 for comments on the daughters of standard V0s.

Tracks from standard V0 Vertices: KFDCT, KLDCT, KNDCT

Charged tracks outgoing from reconstructed DeCay vertices. The momenta for these tracks are calculated relative to the secondary vertex position.

Caution: this section includes only the daughter tracks from reconstructed standard V0s from YV0V, and not from the ``Long V0s'' coming from the new tracking with JULIA version 302 and after (see below).

Reconstructed Long V0s: KFLVT, KLLVT

``Long V0s'' (coming from the new tracking with JULIA version 302 and after). One gets the loop limits for them through the following subroutine call:

CALL QLV0T(KFLVT,KLLVT)

Energy Flow objects: KFEFT, KLEFT, KNEFT

This section includes selected charged tracks and ECAL and HCAL clusters remaining after subtracting track energies. These objects may also be accessed with their particle name `EFLW' using the functions KPDIR and KFOLLO (described in 7.4). This section is not filled unless the EFLW card is included in the card file (see Ch. 11).

Energy Flow objects made with the ENFLW package (see Chapter 11) should be used for all analyses which need an optimised calorimeter energy resolution.

NEutral Calorimeter Objects: KFNET, KLNET, KNNET

Neutral objects derived from the PCPA bank. These objects may also be accessed with their particle name `NEOB' using the functions KPDIR and KFOLLO (described in 7.4). To be used only by experts.

Photons from GAmpec: KFGAT, KLGAT, KNGAT

These objects may also be accessed with their particle name `GAMP' using the functions KPDIR and KFOLLO (described in 7.4).

Jets from EJET: KFJET, KLJET, KNJET

Jets based on EFLW objects using QJMMCL with YCUT = 0.003. These objects may also be accessed with their particle name `EJET' using the functions KPDIR and KFOLLO (described in 7.4). They may be used as input for jet finding with a higher YCUT (see 10.11.1 and 11.1).

Monte Carlo particles (``truth'') KFMCT, KLMCT, KNMCT