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Re: eta_c with event mixing for STT [message #12635 is a reply to message #12584]

Thu, 08 September 2011 02:48

Dima Melnychuk
Messages: 213
Registered: April 2004
Location: National Centre for Nucle...

first-grade participant

From: 140.181.10*

Hi all,

With the latest run eta_c events produced with STT with background mixing are reconstructable.

Multiplicity of reconstructed tracks is rather high:

index.php?t=getfile&id=6627&private=0

With rough pre-selection on phi mass invariant mass distributions looks like:

index.php?t=getfile&id=6628&private=0

So there is small indication of eta_c peak.

But after the final selection:

index.php?t=getfile&id=6629&private=0

eta_c is reconstructed with efficiency 3.3%

Dima

Attachment: n_charged_stt_mix.png
(Size: 10.05KB, Downloaded 1067 times)
Attachment: m_nocuts_stt_mix.png
(Size: 14.37KB, Downloaded 1188 times)
Attachment: m_final_vtx_stt_mix.png
(Size: 12.99KB, Downloaded 1157 times)

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[Message index]

		eta_c with event mixing for STT By: Dima Melnychuk on Tue, 30 August 2011 00:35
		Re: eta_c with event mixing for STT By: Dima Melnychuk on Fri, 02 September 2011 11:37
		Re: eta_c with event mixing for STT By: Dima Melnychuk on Fri, 02 September 2011 17:26
		Re: eta_c with event mixing for STT By: Dima Melnychuk on Thu, 08 September 2011 02:48

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