Previous results - May 2002

This document is intended to provide all the information available for previous productions such that results for Quality Control studies and Productions Cross checks. Part of quality control studies include identification of missing/dead detector areas, distance of closest approach distributions (dca), and fit points distributions(Nfit). As part of production cross checks, some results in centrality dependance and efficiency are shown

Quality Control

dEdx Comparisons

These are dedx vs P graphs. All of them show reasonable agreement with data.(Done on May 2002)


Pi Minus	K Minus	Proton

Pi Plus	K Plus	P Bar

Dca Distributions

PI PLUS. In the following dca distributions some discrepancy is shown. Due to secondaries?


Peripheral 0.1 GeV/c < pT < 0.2 Gev/c	MinBias 0.2 GeV/c < pT < 0.3 Gev/c	Central 0.3 GeV/c <pT < 0.4 GeV/c

PI MINUS. Some discrepancy is shown. Due to secondaries?

Peripheral 0.1 GeV/c < pT < 0.2 Gev/c MinBias 0.2 GeV/c < pT < 0.3 Gev/c Central 0.3 GeV/c <pT < 0.4 GeV/c

K PLUS. In the following dca distributions Good agreement with data is shown.

Peripheral 0.1 GeV/c < pT < 0.2 Gev/c
MinBias 0.2 GeV/c < pT < 0.3 Gev/c
Central 0.3 GeV/c <pT < 0.4 GeV/c

K MINUS. In the following dca distributions Good agreement with data is shown.

Peripheral 0.1 GeV/c < pT < 0.2 Gev/c MinBias 0.2 GeV/c < pT < 0.3 Gev/c Central 0.3 GeV/c <pT < 0.4 GeV/c

PROTON. The real data Dca distribution is wider, especially at low pT -> Most likely due to secondary tracks in the sample. A tail from background protons dominating distribution at low pt can be clearly seen. Expected deviation from the primary MC tracks.

Peripheral 0.2 GeV/c < pT < 0.3 Gev/c MinBias 0.5 GeV/c < pT < 0.6 Gev/c Central 0.7 GeV/c <pT < 0.8 GeV/c

Pbar. The real data Dca distribution is wider, especially at low pT -> Most likely due to secondary tracks in the sample.

Peripheral 0.2 GeV/c < pT < 0.3 Gev/c MinBias 0.3 eV/c < pT < 0.4 Gev/c Central 0.5 GeV/c <pT < 0.6 GeV/c

Number of Fitted Points

PI PLUS. Good agreement with data is shown.

Peripheral 0.1 GeV/c < pT < 0.2 Gev/c
MinBias 0.2 GeV/c < pT < 0.3 Gev/c
Central 0.3 GeV/c <pT < 0.4 GeV/c

PI MINUS. Good agreement with data is shown.

Peripheral 0.1 GeV/c < pT < 0.2 Gev/c Peripheral 0.2 GeV/c < pT < 0.3 Gev/c Peripheral 0.3 GeV/c < pT < 0.4 Gev/c

K PLUS. Good agreement with data is shown.

Peripheral 0.1 GeV/c < pT < 0.2 Gev/c
MinBias 0.2 GeV/c < pT < 0.3 Gev/c
Central 0.3 GeV/c <pT < 0.4 GeV/c

K MINUS. Good agreement with data is shown.

Peripheral 0.1 GeV/c < pT < 0.2 Gev/c Peripheral 0.2 GeV/c < pT < 0.3 Gev/c Peripheral 0.3 GeV/c < pT < 0.4 Gev/c

PROTON. Good agreement with data is shown.

Peripheral 0.2 GeV/c < pT < 0.3 Gev/c Peripheral 0.3 GeV/c < pT < 0.4 Gev/c Peripheral 0.5 GeV/c < pT < 0.6 Gev/c

Pbar. Good agreement with data is shown.

Peripheral 0.2 GeV/c < pT < 0.3 Gev/c Peripheral 0.3 GeV/c < pT < 0.4 Gev/c Peripheral 0.5 GeV/c < pT < 0.6 Gev/c

Productions Cross Checks

Centrality Dependance

5% central
5 % - 10% 10% - 20% 20 % - 30 %

30% - 40% 40% - 50% 50% - 60% 60% - 80%

Reverse Full Field vs Full Field : No asymetry observed

	MinBias	Central
Pi Minus
	Min Bias	Central
K Minus
	MinBias	Central
Pbar

Charge Asymmetry : No asymetry observed for Pi Minus and K Minus. For Pbar more data are needed

MinBias Central
Pi Minus

Min Bias
Central
K Minus

MinBias Central
Pbar


Peripheral 0.2 GeV/c < pT < 0.3 Gev/c	MinBias 0.5 GeV/c < pT < 0.6 Gev/c	Central 0.7 GeV/c <pT < 0.8 GeV/c


Peripheral 0.2 GeV/c < pT < 0.3 Gev/c	MinBias 0.3 eV/c < pT < 0.4 Gev/c	Central 0.5 GeV/c <pT < 0.6 GeV/c


Peripheral 0.1 GeV/c < pT < 0.2 Gev/c	Peripheral 0.2 GeV/c < pT < 0.3 Gev/c	Peripheral 0.3 GeV/c < pT < 0.4 Gev/c


Peripheral 0.2 GeV/c < pT < 0.3 Gev/c	Peripheral 0.3 GeV/c < pT < 0.4 Gev/c	Peripheral 0.5 GeV/c < pT < 0.6 Gev/c


5% central	5 % - 10%	10% - 20%	20 % - 30 %

30% - 40%	40% - 50%	50% - 60%	60% - 80%