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E/p vs p + energy and momentum [message #12985] Wed, 25 January 2012 11:03 Go to next message
Dmitry Khaneft is currently offline  Dmitry Khaneft
Messages: 75
Registered: January 2009
continuous participant
From: *kph.uni-mainz.de
Dear all,

as we agreed on the last evo meeting I attach plots with E/p vs p together with EMC energy and momentum.

pandaroot version = nov11
external packages = may11

emc_raw_lab_3.3_0.0e.eps - EMC energy raw
mom_lab_3.3_0.0e.eps - momentum
p_versus_ep_RAW_3.3_0.0e.eps - E/p vs p (EMC energy raw)

Cheers,
Dmitry
Re: E/p vs p + energy and momentum [message #12988 is a reply to message #12985] Wed, 25 January 2012 11:28 Go to previous messageGo to next message
Johan Messchendorp is currently offline  Johan Messchendorp
Messages: 693
Registered: April 2007
Location: University of Groningen
first-grade participant

From: *KVI.nl
Hi,

Could you also plot Pmc vs (Eraw-Pmc) .... and Pmc vs (Prec-Pmc)?

Thanks,

Johan.
Re: E/p vs p + energy and momentum [message #12990 is a reply to message #12985] Wed, 25 January 2012 13:14 Go to previous messageGo to next message
Gianluigi Boca is currently offline  Gianluigi Boca
Messages: 177
Registered: March 2004
first-grade participant
From: *gsi.de
Dmitry Khaneft wrote on Wed, 25 January 2012 11:03

Dear all,

as we agreed on the last evo meeting I attach plots with E/p vs p together with EMC energy and momentum.

pandaroot version = nov11
external packages = may11

emc_raw_lab_3.3_0.0e.eps - EMC energy raw
mom_lab_3.3_0.0e.eps - momentum
p_versus_ep_RAW_3.3_0.0e.eps - E/p vs p (EMC energy raw)

Cheers,
Dmitry



dear Dmitry,
do you understand why the Emc energy plot (emc_raw_lab_3.3_0.0e.eps) has a dip at 3 GeV ? And do you understand that very peculiar momentum distribution (mom_lab_3.3_0.0e.eps) ?
Gianluigi
Re: E/p vs p + energy and momentum [message #12993 is a reply to message #12990] Mon, 30 January 2012 17:17 Go to previous messageGo to next message
Dmitry Khaneft is currently offline  Dmitry Khaneft
Messages: 75
Registered: January 2009
continuous participant
From: *kph.uni-mainz.de
Gianluigi Boca wrote on Wed, 25 January 2012 13:14


dear Dmitry,
do you understand why the Emc energy plot (emc_raw_lab_3.3_0.0e.eps) has a dip at 3 GeV ? And do you understand that very peculiar momentum distribution (mom_lab_3.3_0.0e.eps) ?
Gianluigi

Dear Gianluigi,

sorry for the late answer.

This energy drop on the emc_raw_lab_3.3_0.0e.eps plots is explained by the transition from the barrel to forward endcap. Below you will find 3 plots for the backward/forward endcaps and for the barrel.

emc_raw_ba_lab_3.3_0.0e.eps - EMC barrel
emc_raw_bw_lab_3.3_0.0e.eps - EMC backward endcap
emc_raw_fw_lab_3.3_0.0e.eps - EMC forward endcap

As for momentum, I think it is a consequences of momentum distribution of initial electrons and positrons (see mom_neg_lab_3.3_0.0e.eps)

Dmitry
Re: E/p vs p + energy and momentum [message #12996 is a reply to message #12985] Tue, 31 January 2012 14:08 Go to previous message
Dmitry Khaneft is currently offline  Dmitry Khaneft
Messages: 75
Registered: January 2009
continuous participant
From: *kph.uni-mainz.de
Dear all,

I repeat the simulation w/o ideal hypothesis i.e. "recoKalman->SetIdealHyp(kTRUE);" was commented out. As one can see the E/p distribution is much narrower then before.

Can someone explain a kind of line at p=1 GeV on CAL plot where RAW looks pretty smooth?

Cheers,
Dmitry
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