sherpa is hosted by Hepforge, IPPP Durham
close Warning: Can't synchronize with repository "(default)" (/hepforge/svn/sherpa does not appear to be a Subversion repository.). Look in the Trac log for more information.
Modify ↓

Opened 16 years ago

Closed 16 years ago

Last modified 11 years ago

#38 closed defect (duplicate)

Problem with b decays: B hadron lifetime much too short in 2/3 of all cases?

Reported by: Martin Flechl Owned by: support@sherpa-mc.de
Priority: major Milestone:
Component: Unknown Version: 1.1.2
Keywords: Cc:

Description

I am producing ttbar->bqqbtaunu events, where the first tau in the event is forced to decay hadronically. Sherpa event files are read in with the ATLAS Sherpa interface and then analyzed.

After detector simulation, I observed a b-tagging efficiency which is a factor 3 lower than expected. A quick check by b-tagging experts indicates that the (truth) B hadron decay length is very small in about 2/3 of all cases.

The Run.dat is attached. The whole Decaydata directory has been copied to the Run directory and only the tau decay info has been modified.

Martin

Attachments (0)

Change History (3)

comment:1 Changed 16 years ago by Frank Siegert

Resolution: → duplicate
Status: new → closed

comment:2 Changed 13 years ago by Frank Siegert

Milestone: → rel-old

comment:3 Changed 11 years ago by Stefan Hoeche

Milestone: old

Milestone old deleted

Modify Ticket

Change Properties
Action
as closed The owner will remain support@sherpa-mc.de.

Add Comment

E-mail address and name can be saved in the Preferences.

Attachments ↑ Description ↑
 
Note: See TracTickets for help on using tickets.