Measurement of the Mass Difference between $t$ and $\bar{t}$ Quarks - INSPIRE

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Measurement of the Mass Difference between $t$ and $\bar{t}$ Quarks

CDF

Collaboration

Mar, 2011

7 pages

Published in:

Phys.Rev.Lett. 106 (2011) 152001

e-Print:

1103.2782 [hep-ex]

DOI:

10.1103/PhysRevLett.106.152001

PDG:

{\mathit m}_{{{\mathit t}}}

{\mathit m}_{{{\overline{\mathit t}}}}

Report number:

FERMILAB-PUB-11-062-E

Experiments:

FNAL-E-0830

View in:

reference search35 citations

Citations per year

Abstract: (arXiv)

We present a direct measurement of the mass difference between

t

and

\bar{t}

quarks using

t\bar{t}

candidate events in the lepton+jets channel, collected with the CDF II detector at Fermilab's 1.96 TeV Tevatron

p\bar{p}

Collider. We make an event by event estimate of the mass difference to construct templates for top quark pair signal events and background events. The resulting mass difference distribution of data is compared to templates of signals and background using a maximum likelihood fit. From a sample corresponding to an integrated luminosity of \invfb{5.6}, we measure a mass difference,

\Delta M_{top} = M_t - M_{\bar{t}}

= -3.3

\pm

1.4(stat)

\pm

1.0(syst), approximately two standard deviations away from the CPT hypothesis of zero mass difference. This is the most precise measurement of a mass difference between

t

and its

\bar{t}

partner to date.

Note:

submitted to Phys. Rev. Lett

13.85.Ni
12.15.Ff
14.65.Ha
13.85.Qk
mass difference: (top anti-top)
Batavia TEVATRON Coll
CDF
experimental results
anti-p p: interaction
top: pair production

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