Abstract
A search for \(C\!P\) violation in the decay \(D^+ \rightarrow \phi \pi ^+\) is described. This search used 1 \(fb^{-1}\) of data collected at LHCb in 2011. A measurement of the \(C\!P\) violation integrated across the resonance is complemented by the definition and measurement of a new observable for CPV searches in decays to vector mesons. This quantity exploits the variation of the strong phase across the resonance in the Dalitz plot. The systematic uncertainties associated with the precision measurement of charge asymmetries at a hadron collider are discussed in detail. The searches are the most sensitive to date but no \(C\!P\) violation was found.
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Belle collaboration, Staric M et al (2012) Search for violation in \(D^\pm \) meson decays to \(\phi \pi ^{\pm }\). Phys Rev Lett 108:071801. arXiv:1110.0694
BaBar collaboration, Lees J et al (2013) Search for direct \(CP\)-violation in singly-Cabibbo suppressed \(D^\pm \rightarrow K^{+} K^{-} \pi ^\pm \) decays. Phys Rev D 87:052010. arXiv:1212.1856
LHCb collaboration, Aaij R et al (2013) Measurement of the \(D^{\pm }\) production asymmetry in 7Tev pp collisions. Phys Lett B718:902. arXiv:1210.4112
Cazaroto E, Goncalves V, Navarra F, Nielsen M, On the energy dependence of the \(D^{+}/D^{-}\) production asymmetry. arXiv:1302.0035
LHCb collaboration, Aaij R et al (2012) Measurement of the \(D_{s}^{+} - D_{s}^{-}\) production asymmetry in 7 TeV pp collisions. Phys Lett B713:186. arXiv:1205.0897
Belle collaboration, Ko B et al (2012) Evidence for CP violation in the decay \(D^+\rightarrow K^{0}_{S}\pi ^{+}\). Phys Rev Lett 109:021601. arXiv:1203.6409
LHCb collaboration, Aaij R et al (2013) Prompt charm production in pp collisions at sqrt(s)=7 TeV. Nucl Phys B871:1. arXiv:1302.2864
Atwood D, Soni A, Searching for the origin of CP violation in Cabibbo-suppressed D-meson decays. arXiv:1211.1026
Wilson KG (1969) Non-Lagrangian models of current algebra. Phys Rev 179:1499
Buchalla G, Buras AJ, Lautenbacher ME (1996) Weak decays beyond leading logarithms. Rev Mod Phys 68:1125 arXiv:hep-ph/9512380
CLEO collaboration, Rubin P et al (2008) Search for violation in the Dalitz-plot analysis of \(D^{+} \rightarrow K^{-} K^{+} \pi ^{+}\). Phys Rev D78:072003. arXiv:0807.4545
BABAR collaboration, Aubert B et al (2005) Dalitz plot analysis of \(D^{0} \rightarrow \bar{K}^{0} K^{+} K^{-}\). Phys Rev D72:052008. arXiv:hep-ex/0507026
Xie Y, Clarke P, Cowan G, Muheim F (2009) Determination of \(2\beta _{s}\) in \(B_{2}{0} \rightarrow J/\psi K^{-}K^{+}\) decays in the presence of a \(K^{-}K^{+}\) S-wave contribution. JHEP 0909:074 arXiv:0908.3627
Particle Data Group, Beringer J et al (2012) Review of particle physics. Phys Rev D86:010001
LHCb collaboration, Aaij R et al LHCb performance, unpublished
Needham M (2008) Clone track identification using the Kullback-Liebler distance. Tech Rep LHCb-2008-002, CERN, Geneva
Lanfranchi G et al (2009) The muon identification procedure of the LHCb experiment for the first data. Tech Rep LHCb-PUB-2009-013, CERN, Geneva
LHCb collaboration, Aaij R et al (2012) Evidence for violation in time-integrated \(D^0 \rightarrow h^{-}h^{+}\) decay rates. Phys Rev Lett 108:111602. arXiv:1112.0938
Skwarnicki T (1986) A study of the radiative cascade transitions between the Upsilon-prime and Upsilon resonances, Ph.D. thesis, Institute of Nuclear Physics, Krakow, DESY-F31-86-02
collaboration, del Amo Sanchez P et al (2010) Study of \(B \rightarrow X\gamma \) decays and determination of \(|V_{td}/V_{ts}|\). Phys Rev D82:051101. arXiv:1005.4087
Verkerke W, Kirkby D, The RooFit toolkit for data modeling. arXiv:physics/0306116
Latham T (2011) The Laura\(++\) fitting package for Dalitz plots. Private communication
CPLEAR collaboration, Apostolakis A et al (2000) A detailed description of the analysis of the decay of neutral kaons to \(\pi ^{+}\pi ^{-}\) in the CPLEAR experiment. Eur Phys J C18:41
Grossman Y, Nir Y (2012) CP violation in \(tau^{-} \rightarrow \nu \pi ^{-}K_{s}^{0}\) and \(D^{+} \rightarrow \pi K^{0}_{s}\) : the importance of \(K_{S}^{0}-K_{L}^{0}\) interference. JHEP 04:002 arXiv:1110.3790
Coombes M (2012) Paths of tracks in the LHCb magnet. Private communication
LHCb collaboration, Aaij R et al (2012) Observation of CP violation in \(B^{+} \rightarrow DK^{+}\) decays. Phys Lett B712:203. arXiv:1203.3662
LHCb collaboration, Aaij R et al (2012) First evidence of direct CP violation in charmless two-body decays of \(B_{S}^{0}\) mesons. Phys Rev Lett 108:201601. arXiv:1202.6251
LHCb collaboration, Aaij R et al (2010) Prompt charm production in \(pp\) collisions at \(\sqrt{s} = 7 TeV\), LHCb-CONF-2010–013. LHCb-CONF-2010–013
LHCb collaboration, Aaij R et al (2010) Measurement of \(\sigma (pp \rightarrow b \bar{b} X)\) at \(\sqrt{s}=7 \rm {TeV}\) in the forward region. Phys Lett B694:209, arXiv:1009.2731
Gordon H, Lambert RW, van Tilburg J, Vesterinen M (2012) A measurement of the \(K\pi \) detection asymmetry. Tech Rep LHCb-INT-2012-027, CERN, Geneva
Ko B, Won E, Golob B, Pakhlov P (2011) Effect of nuclear interactions of neutral kaons on CP asymmetry measurements. Phys Rev D84:111501 arXiv:1006.1938
Xing Z et al (2012) TextitMeasurement of the \(D_{s}^{+}\)-\(D_{s}^{-}\) Production Asymmetry, LHCb-ANA-2012-011
Roe BP et al (2005) Boosted decision trees as an alternative to artificial neural networks for particle identification. Nucl Instrum Meth A543:577 arXiv:physics/0408124
Hoecker A et al (2007) TMVA: toolkit for multivariate data analysis, PoS ACAT:040. arXiv:physics/0703039
Bigi II, Yamamoto H (1995) Interference between Cabibbo allowed and doubly forbidden transitions in \(D^{+} \rightarrow K_{S}^{0}, K_{L}^{0} + \pi \) decays. Phys Lett B349:363 arXiv:hep-ph/9502238
LHCb collaboration, Aaij R et al (2013) A search for time-integrated \(CP\) violation in \(D^0\rightarrow K^{-}K^{+}\) and \(D^{0}\rightarrow \pi ^{-}\pi ^{+}\) decays, LHCb-CONF-2013–003
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Gordon, H. (2014). Search for \(C\!P\) Violation in \({D} ^{+} \rightarrow \phi \pi ^{+} \) Decays with Data Collected at LHCb in 2011. In: Searches for CP Violation in Charmed Meson Decays. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-07067-4_4
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DOI: https://doi.org/10.1007/978-3-319-07067-4_4
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