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The "nano database" is the most compact form of the "event store" for BABAR data in Objectivity or Kanga format. The nano database is also called the tag database. It contains tag bits (and bytes) as well as information that characterizes the entire ev ent. It does not include information about individual tracks and clusters, which is contained in the "micro database". The contents of the tag and micro databases are documented at on a page linked to the Physics web page under "Information about BABA

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/nanomicro/newest/)

1 Nano Barn (nb) = 10^{-9} barns

A unit of cross section, 1 nb is one billionth of a barn, where 1 barn = 10**-24 cm**2.

Unit of cross section. 1 barn = 10^-28 m^2

Unit of interaction cross section. 1 barn = 1.0e-28 m^2. 1 nb = 1 nano barn = 1.0e-9 barn

number of degrees of freedom

Neural network, (NN), is a tagging method. It is denoted by the string NN in the code.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/analysis/analysis.html#tagging)

This is a BaBar computing environment defined command. It is used to create a new release of the BaBar Software in the current working directory.

Reference Link (http://www.slac.stanford.edu/cgi-wrap/bfman/page?newrel)

Nuclear Instruments and Methods in Physics Research

Reference Link (http://www.elsevier.com/gej-ng/29/35/25/show/Products/NPE/toc.htt)

Non Optimal Tagging, (NOT), is a cut based tagging method.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/analysis/analysis.html#tagging)

A non-resonant decay is one in which a particle decays to a set of stable particles without any intermediate resonant particles in the decay chain.

Novosibirsk is the capital of Siberia. The Budker Institute of Nuclear Physics is based at Novosibirsk. See also: Novosibirsk function

Reference Link (http://www.inp.nsk.su/index.en.shtml)

The Novosibirsk function is usually defined by: f(m_{ES}) = A_S \exp ( -0.5 { \ln^2 [1 + \Lambda \tau \cdot (m_{ES} - m_0) ] / \tau^2 + \tau^2 } ), where \Lambda = \sinh ( \tau \sqrt{\ln 4} ) / ( \sigma \tau \sqrt{\ln 4} ), the peak position is m_0, the width is \sigma, and \tau is the tail parameter.

A tag value giving the total number of charged tracks in an event.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/nanomicro/v8.8/Nano/Event_Params.html)

An Ntuple is a set of events, where for each event the value of a number of variables is recorded. An Ntuple can be viewed as a table with each row corresponding to one event and each column corresponding to given variable. The Ntuple concept is defined and used in the PAW (Physics Analysis Workstation) analysis software package. Web pages: http://wwwinfo.cern.ch/asd/paw/index.html http://wwwinfo.cern.ch/asd/paw/reference_manual/NTUPLE.html

Reference Link (http://wwwinfo.cern.ch/asd/paw/reference_manual/NTUPLE.html)

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Last significant update: 10-Sept-2002