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Journal of High Energy Physics

, 2018:21 | Cite as

Measurement of the charge asymmetry for the KSπeν decay and test of CPT symmetry with the KLOE detector

  • The KLOE-2 collaboration
  • A. Anastasi
  • D. Babusci
  • M. Berlowski
  • C. Bloise
  • F. Bossi
  • P. Branchini
  • A. Budano
  • B. Cao
  • G. Capon
  • F. Ceradini
  • P. Ciambrone
  • F. Curciarello
  • E. Czerwinski
  • G. D’Agostini
  • E. Danè
  • V. De Leo
  • E. De Lucia
  • A. De Santis
  • P. De Simone
  • A. Di Cicco
  • A. Di Domenico
  • D. Domenici
  • A. D’Uffizi
  • A. Fantini
  • G. Fantini
  • P. Fermani
  • S. Fiore
  • A. Gajos
  • P. Gauzzi
  • S. Giovannella
  • E. Graziani
  • V. L. Ivanov
  • T. Johansson
  • X. Kang
  • D. Kisielewska-Kaminska
  • E. A. Kozyrev
  • W. Krzemien
  • A. Kupsć
  • S. Loffredo
  • P. A. Lukin
  • G. Mandaglio
  • M. Martini
  • R. Messi
  • S. Miscetti
  • D. Moricciani
  • P. Moskal
  • A. Passeri
  • V. Patera
  • E. Perez del Rio
  • N. Raha
  • P. Santangelo
  • M. Schioppa
  • A. Selce
  • M. Silarski
  • F. Sirghi
  • E. P. Solodov
  • L. Tortora
  • G. Venanzoni
  • W. Wislicki
  • M. Wolke
Open Access
Regular Article - Experimental Physics
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Abstract

Using 1.63 fb−1 of integrated luminosity collected by the KLOE experiment about 7 × 104 KSπ±eν decays have been reconstructed. The measured value of the charge asymmetry for this decay is AS = (−4.9 ± 5.7stat ± 2.6syst) × 10−3, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives AS = (−3.8 ± 5.0stat ± 2.6syst) × 10−3 and, together with the asymmetry of the KL semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.

Keywords

CP violation e+-e- Experiments Flavor physics 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

References

  1. [1]
    F. Niebergall et al., Experimental study of the ΔSΔQ rule in the time dependent rate of K 0πeν, Phys. Lett. B 49 (1974) 103 [INSPIRE].ADSCrossRefGoogle Scholar
  2. [2]
    S. Bennett, D. Nygren, H. Saal, J. Steinberger and J. Sunderland, Measurement of the Charge Asymmetry in the Decay K L0 → π ± + e  + ν, Phys. Rev. Lett. 19 (1967) 993 [INSPIRE].ADSCrossRefGoogle Scholar
  3. [3]
    KLOE collaboration, F. Ambrosino et al., |V us| and lepton universality from kaon decays with the KLOE detector, JHEP 04 (2008) 059 [arXiv:0802.3009] [INSPIRE].
  4. [4]
    FlaviaNet Working Group on Kaon Decays collaboration, M. Antonelli et al., An Evaluation of |V us| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays, Eur. Phys. J. C 69 (2010) 399 [arXiv:1005.2323] [INSPIRE].
  5. [5]
    M. Hayakawa and A.I. Sanda, Searching for T, CP, CPT and ΔS = ΔQ rule violations in the neutral K meson system: A Guide, Phys. Rev. D 48 (1993) 1150 [hep-ph/9302206] [INSPIRE].
  6. [6]
    L. Maiani, CP and CPT violation in neutral kaon decays, in The Second DAΦNE Physics Handbook. Volume I, L. Maiani, G. Pancheri and N. Paver eds., INFN, Frascati Italy (1995), pp. 3–26 [INSPIRE].
  7. [7]
    G. Lüders, Proof of the TCP theorem, Annals Phys. 2 (1957) 1 [INSPIRE].ADSMathSciNetCrossRefzbMATHGoogle Scholar
  8. [8]
    N.E. Mavromatos, Decoherence and CPT Violation in a Stringy Model of Space-Time Foam, Found. Phys. 40 (2010) 917 [arXiv:0906.2712] [INSPIRE].ADSMathSciNetCrossRefzbMATHGoogle Scholar
  9. [9]
    S. Liberati, Tests of Lorentz invariance: a 2013 update, Class. Quant. Grav. 30 (2013) 133001 [arXiv:1304.5795] [INSPIRE].ADSMathSciNetCrossRefzbMATHGoogle Scholar
  10. [10]
    J. Bernabeu, A. Di Domenico and P. Villanueva-Perez, Probing CPT in transitions with entangled neutral kaons, JHEP 10 (2015) 139 [arXiv:1509.02000] [INSPIRE].ADSCrossRefGoogle Scholar
  11. [11]
    J.S. Bell and J. Steinberger, Weak interactions of kaons, in proceeedings of the Oxford International Conference on Elementary Particles, Oxford, U.K., 19–25 September 1965 [INSPIRE].
  12. [12]
    KLOE collaboration, F. Ambrosino et al., Determination of CP and CPT violation parameters in the neutral kaon system using the Bell-Steinberger relation and data from the KLOE experiment, JHEP 12 (2006) 011 [hep-ex/0610034] [INSPIRE].
  13. [13]
    Particle Data Group collaboration, C. Patrignani et al., Review of Particle Physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
  14. [14]
    KTeV collaboration, A. Alavi-Harati et al., A Measurement of the K L charge asymmetry, Phys. Rev. Lett. 88 (2002) 181601 [hep-ex/0202016] [INSPIRE].
  15. [15]
    A. Di Domenico, Handbook on Neutral Kaon Interferometry at a ϕ-factory, Frascati Physics Series, volume 43, INFN, Frascati Italy (2007) [INSPIRE].
  16. [16]
    A. Gallo et al., DAFNE status report, Conf. Proc. C 060626 (2006) 604 [INSPIRE].ADSGoogle Scholar
  17. [17]
    KLOE collaboration, F. Ambrosino et al., Study of the branching ratio and charge asymmetry for the decay K Sπeν with the KLOE detector, Phys. Lett. B 636 (2006) 173 [hep-ex/0601026] [INSPIRE].
  18. [18]
    M. Adinolfi et al., The tracking detector of the KLOE experiment, Nucl. Instrum. Meth. A 488 (2002) 51 [INSPIRE].ADSCrossRefGoogle Scholar
  19. [19]
    M. Adinolfi et al., The KLOE electromagnetic calorimeter, Nucl. Instrum. Meth. A 482 (2002) 364 [INSPIRE].ADSCrossRefGoogle Scholar
  20. [20]
    KLOE collaboration, M. Adinolfi et al., The trigger system of the KLOE experiment, Nucl. Instrum. Meth. A 492 (2002) 134 [INSPIRE].
  21. [21]
    F. Ambrosino et al., Data handling, reconstruction and simulation for the KLOE experiment, Nucl. Instrum. Meth. A 534 (2004) 403 [physics/0404100] [INSPIRE].
  22. [22]
    R.J. Barlow and C. Beeston, Fitting using finite Monte Carlo samples, Comput. Phys. Commun. 77 (1993) 219 [INSPIRE].ADSCrossRefGoogle Scholar
  23. [23]
    S. Baker and R.D. Cousins, Clarification of the use of CHI-square and likelihood functions in fits to histograms, Nucl. Instrum. Meth. 221 (1984) 437 [INSPIRE].CrossRefGoogle Scholar

Copyright information

© The Author(s) 2018

Authors and Affiliations

  • The KLOE-2 collaboration
  • A. Anastasi
    • 1
    • 2
  • D. Babusci
    • 2
  • M. Berlowski
    • 2
    • 3
  • C. Bloise
    • 2
  • F. Bossi
    • 2
  • P. Branchini
    • 4
  • A. Budano
    • 5
    • 4
  • B. Cao
    • 6
  • G. Capon
    • 2
  • F. Ceradini
    • 5
    • 4
  • P. Ciambrone
    • 2
  • F. Curciarello
    • 2
  • E. Czerwinski
    • 7
  • G. D’Agostini
    • 8
    • 9
  • E. Danè
    • 2
  • V. De Leo
    • 11
  • E. De Lucia
    • 2
  • A. De Santis
    • 2
  • P. De Simone
    • 2
  • A. Di Cicco
    • 5
    • 4
  • A. Di Domenico
    • 8
    • 9
  • D. Domenici
    • 2
  • A. D’Uffizi
    • 2
  • A. Fantini
    • 12
    • 11
  • G. Fantini
    • 13
  • P. Fermani
    • 2
  • S. Fiore
    • 14
    • 9
  • A. Gajos
    • 7
  • P. Gauzzi
    • 8
    • 9
  • S. Giovannella
    • 2
  • E. Graziani
    • 4
  • V. L. Ivanov
    • 15
    • 17
  • T. Johansson
    • 6
  • X. Kang
    • 2
  • D. Kisielewska-Kaminska
    • 7
  • E. A. Kozyrev
    • 15
    • 17
  • W. Krzemien
    • 3
  • A. Kupsć
    • 6
  • S. Loffredo
    • 5
    • 4
  • P. A. Lukin
    • 15
    • 17
  • G. Mandaglio
    • 16
    • 18
  • M. Martini
    • 2
    • 10
  • R. Messi
    • 12
    • 11
  • S. Miscetti
    • 2
  • D. Moricciani
    • 11
  • P. Moskal
    • 7
  • A. Passeri
    • 4
  • V. Patera
    • 19
    • 9
  • E. Perez del Rio
    • 2
  • N. Raha
    • 11
  • P. Santangelo
    • 2
  • M. Schioppa
    • 20
    • 21
  • A. Selce
    • 5
    • 4
  • M. Silarski
    • 7
  • F. Sirghi
    • 2
    • 22
  • E. P. Solodov
    • 15
    • 17
  • L. Tortora
    • 4
  • G. Venanzoni
    • 23
  • W. Wislicki
    • 3
  • M. Wolke
    • 6
  1. 1.Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra dell’Università di MessinaMessinaItaly
  2. 2.Laboratori Nazionali di Frascati dell’INFNFrascatiItaly
  3. 3.National Centre for Nuclear ResearchWarsawPoland
  4. 4.INFN Sezione di Roma TreRomaItaly
  5. 5.Dipartimento di Matematica e Fisica dell’Università “Roma Tre”RomaItaly
  6. 6.Department of Physics and Astronomy, Uppsala UniversityUppsalaSweden
  7. 7.Institute of PhysicsJagiellonian UniversityCracowPoland
  8. 8.Dipartimento di Fisica dell’Università “Sapienza”RomaItaly
  9. 9.INFN Sezione di RomaRomaItaly
  10. 10.Dipartimento di Scienze e Tecnologie applicate, Università “Guglielmo Marconi”RomaItaly
  11. 11.INFN Sezione di Roma Tor VergataRomaItaly
  12. 12.Dipartimento di Fisica dell’Università “Tor Vergata”RomaItaly
  13. 13.Gran Sasso Science InstituteL’AquilaItaly
  14. 14.ENEA UTTMAT-IRR, Casaccia R.C.RomaItaly
  15. 15.Budker Institute of Nuclear PhysicsNovosibirskRussia
  16. 16.Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali dell’Università di MessinaMessinaItaly
  17. 17.Novosibirsk State UniversityNovosibirskRussia
  18. 18.INFN Sezione di CataniaCataniaItaly
  19. 19.Dipartimento di Scienze di Base ed Applicate per l’Ingegneria dell’Università “Sapienza”RomaItaly
  20. 20.Dipartimento di Fisica dell’Università della CalabriaRendeItaly
  21. 21.INFN Gruppo collegato di CosenzaRendeItaly
  22. 22.Horia Hulubei National Institute of Physics and Nuclear EngineeringMǎgureleRomania
  23. 23.INFN Sezione di PisaPisaItaly

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