LHCb at Nikhef

This is the TWiki page for Nikhef collaborators on the LHCb experiment.

It has been setup to help you, and contains hints and tips about working here at Nikhef and for LHCb in general.

To gain editing access to these pages, contact anyone already in the twiki group (as given below)

Nikhef group structure

The B-physics department at Nikhef implements the research program 23 of the FOM funding agency:

• "Study of charge-parity violation with the LHCb experiment at CERN".
• The program runs over the period 1999-2014.
• The mission is to search for new particles or interactions that affect the observed matter-antimatter asymmetry in nature by making preciosn measurements of B-meson decays.
• The participating institutes are the Nikhef-FOM, and the Nikhef-VU groups.

In the first half of the FOM programme the group has contributed to:

• the construction of the LHCb experiment while
• the data analysisof the HERA-B and Babar experiments.

In the second half of the program the focus is on data taking and physics analysis with the LHCb experiment as well as on preparation of the LHCb upgrade experiment.

• Programme leader: dr. Mara Soares
• Deputy programme leader: dr. Niels Tuning

Nikhef theses: list

For more information, see the main website.

Nikhef people

• A google sheet of all the group members can be found here.
• An overview of the people currently working at LHCb Nikhef, sorted by topics, can be found in this page

PhD candidates: conferences attendance

Group Meetings

The BFys group, and the LHCb group at Nikhef have regular meetings, advertised through bfys-physics AT nikhef.nl.

The LHCb group meets usually on Friday mornings, roughly once every two weeks. The agenda can be found under the B-physics category on the Nikhef Indico

There are also regular colloquia, advertised by internal annoucements (intercom) and similarly on the Nikhef Indico

MarcelMerk maintains also a google calendar of other misc events. These calendars are embedded below.

Anonymous Q&A

Local Computing Resources and Software Guides

Nikhef is home to a tier 1 resource for LHCb. As such, the local computing resources are vast.

• NikhefCPUResources: Getting access to the various processors at Nikhef
• NikhefDiskResources: Local disk space, access, tips, etc.
• NikhefLocalSoftware: Using the LHCb software installations at Nikhef
• NikhefCrossPlatform: Working on multiple platforms? Get advice here.

Physics Topics

Nikhef is active in several ongoing LHCb physics analyses, including:

• B →J/ψ X:
  • Measurement of φ_s (LHCb-CONF-2011-049)
  • Cabibbo-suppressed partners (LHCb-CONF-2011-048)
• B_(s) → D_(s)h:
  • Time dependent B_s → D_sK
  • Branching fraction B_s → D_sK(LHCb-CONF-2011-057)
  • Hadronic determination of f_s/f_d (arXiv:1106.4435)
• B_(s) → μμ:
  • Analysis Info (Phys Lett B699 (2011) 330-340) (LHCb+CMS combination)
  • fs/fd combination
• D0 → hh:
  • Charm production

Nikhef participates in the hardware construction, commissioning, running of LHCb particularly for the:

• Scintilator Fiber Tracker
• Real Time Analysis
• Outer Tracker (Twiki)
• VELO

Links

Software links:

• LHCb computing page
  • LHCbComputing tWiki, with lots of useful information
  • Software Bugs
  • LHCbTagCollector current software head revisions
  • LHCb FAQ software frequently asked questions
• DIRAC
  • DIRAC homepage
  • Monitoring
  • DIRAC bugs
• Ganga
  • Ganga homepage
  • GangaLHCbFAQ
  • Ganga bugs
  • Ganga Utils
• DaVinci and LoKi
  • DaVinci homepage
  • LoKi bugs
  • Loki commonly used filters
  • All loki particle functions
• Nightlies
  • Nightlies summary

Nikhef links:

• Nikhef
• FOM
• VU
• BFys
• Travel Claims

Other Links:

• LHCb web page
• LHCb VO registration page
• Information on Grid certificates
• Using std::set

Info new people

• https://twiki.cern.ch/twiki/bin/view/Main/CheckListNewcomers

TWikiMembers

• Member list:
  • Set GROUP = WouterHulsbergen, NielsTuning, AntonioPellegrino, MarcelMerk, GerhardRaven, MaraSSoares, PatrickKoppenburg
• Persons/group who can change the list:
  • Set ALLOWTOPICCHANGE = NikhefLHCbGroup

Related topics: TWikiUsers, TWikiGroups, TWikiAccessControl