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Testing the standard model and searching for new physics with B d ππ and B s KK decays

  • M. Ciuchini
  • E. Franco
  • S. Mishima
  • L. Silvestrini
Article

Abstract

We propose to perform a combined analysis of B → ππ and B sK + K modes, in the framework of a global CKM fit. The method optimizes the constraining power of these decays and allows to derive constraints on NP contributions to penguin amplitudes or on the B s mixing phase. We illustrate these capabilities with a simplified analysis using the recent measurements by the LHCb Collaboration, neglecting correlations with other SM observables.

Keywords

B-Physics CP violation Rare Decays 

References

  1. [1]
    M. Gronau and D. London, Isospin analysis of CP asymmetries in B decays, Phys. Rev. Lett. 65 (1990) 3381 [INSPIRE].ADSCrossRefGoogle Scholar
  2. [2]
    J. Charles, Taming the penguin in the \( B_d^0(t) \) → π+π CP asymmetry: observables and minimal theoretical input, Phys. Rev. D 59 (1999) 054007 [hep-ph/9806468] [INSPIRE].ADSGoogle Scholar
  3. [3]
    UTfit collaboration, M. Bona et al., Improved determination of the CKM angle α from B→ππ decays,Phys. Rev. D 76 (2007) 014015 [hep-ph/0701204][INSPIRE].ADSGoogle Scholar
  4. [4]
    R. Fleischer, New strategies to extract β and γ from B d → π+π and B sK + K , Phys. Lett. B 459 (1999) 306 [hep-ph/9903456] [INSPIRE].ADSGoogle Scholar
  5. [5]
    R. Fleischer, B s,d → ππ, πK, KK: status and prospects, Eur. Phys. J. C 52 (2007) 267 [arXiv:0705.1121] [INSPIRE].ADSCrossRefGoogle Scholar
  6. [6]
    R. Fleischer and R. Knegjens, In pursuit of new physics with \( B_s^0 \)K + K , Eur. Phys. J. C 71 (2011) 1532 [arXiv:1011.1096] [INSPIRE].ADSGoogle Scholar
  7. [7]
    LHCb collaboration, Measurement of time-dependent CP violation in charmless two-body B decays, LHCb-CONF-2012-007 (2012).Google Scholar
  8. [8]
    M. Beneke, Estimate of SU(3) flavor symmetry breaking in B sK + K versus B d → π+π decay, eConf C 0304052 (2003) FO001 [hep-ph/0308040] [INSPIRE].
  9. [9]
    M. Ciuchini, M. Pierini and L. Silvestrini, The effect of penguins in the B dJ ψ K 0 CP asymmetry, Phys. Rev. Lett. 95 (2005) 221804 [hep-ph/0507290] [INSPIRE].ADSCrossRefGoogle Scholar
  10. [10]
    S. Faller, M. Jung, R. Fleischer and T. Mannel, The golden modes B 0J/ψK(S, L) in the era of precision flavour physics, Phys. Rev. D 79 (2009) 014030 [arXiv:0809.0842] [INSPIRE].ADSGoogle Scholar
  11. [11]
    M. Gronau and J.L. Rosner, Doubly CKM-suppressed corrections to CP asymmetries in B 0J/ψK 0, Phys. Lett. B 672 (2009) 349 [arXiv:0812.4796] [INSPIRE].ADSGoogle Scholar
  12. [12]
    M. Ciuchini, M. Pierini and L. Silvestrini, Theoretical uncertainty in sin 2β: an update, arXiv:1102.0392 [INSPIRE].
  13. [13]
    M. Ciuchini, M. Pierini and L. Silvestrini, B sK (∗)0 K (∗)0 decays: the golden channels for new physics searches, Phys. Rev. Lett. 100 (2008) 031802 [hep-ph/0703137] [INSPIRE].ADSCrossRefGoogle Scholar
  14. [14]
    S. Faller, R. Fleischer and T. Mannel, Precision physics with \( B_s^0 \)J/ψφ at the LHC: the quest for new physics, Phys. Rev. D 79 (2009) 014005 [arXiv:0810.4248] [INSPIRE].ADSGoogle Scholar
  15. [15]
    BABAR collaboration, B. Aubert et al., Measurement of CP asymmetries and branching fractions in B 0 →→ π+π , B 0K +π , B 0 → π0π0 , B 0K 0π0 and isospin analysis of B→ππ decays,arXiv:0807.4226[INSPIRE].
  16. [16]
    Belle collaboration, H. Ishino et al., Observation of direct CP-violation in B 0 → π+π decays and model-independent constraints on φ(2), Phys. Rev. Lett. 98 (2007) 211801 [hep-ex/0608035] [INSPIRE].ADSCrossRefGoogle Scholar
  17. [17]
    BABAR collaboration, B. Aubert et al., Improved measurements of the branching fractions for B 0 → π+π and B 0K +π and a search for B 0K + K , Phys. Rev. D 75 (2007) 012008 [hep-ex/0608003] [INSPIRE].ADSGoogle Scholar
  18. [18]
    P. Chang, Direct CPV and charmless B decays at Belle, PoS(EPS-HEP2011)140.Google Scholar
  19. [19]
    CLEO collaboration, A. Bornheim et al., Measurements of charmless hadronic two body B meson decays and the ratio B(BDK)/B(BDπ), Phys. Rev. D 68 (2003) 052002 [Erratum ibid. D 75 (2007) 119907] [hep-ex/0302026] [INSPIRE].ADSGoogle Scholar
  20. [20]
    CDF collaboration, T. Aaltonen et al., Measurements of direct CP-violating asymmetries in charmless decays of strange bottom mesons and bottom baryons, Phys. Rev. Lett. 106 (2011) 181802 [arXiv:1103.5762] [INSPIRE].ADSCrossRefGoogle Scholar
  21. [21]
    Belle collaboration, K. Abe et al., Observation of B 0 → π0π0, Phys. Rev. Lett. 94 (2005) 181803 [hep-ex/0408101] [INSPIRE].ADSCrossRefGoogle Scholar
  22. [22]
    BABAR collaboration, B. Aubert et al., Study of B 0 → π0π0 , B ± → π±π0 and B ±K ±π0 decays and isospin analysis of B → ππ Decays, Phys. Rev. D 76 (2007) 091102 [arXiv:0707.2798] [INSPIRE].ADSGoogle Scholar
  23. [23]
    Belle collaboration, C.-C. Peng et al., Search for \( B_s^0 \)hh decays at the Υ(5S) resonance, Phys. Rev. D 82 (2010) 072007 [arXiv:1006.5115] [INSPIRE].ADSGoogle Scholar
  24. [24]
    Heavy Flavor Averaging Group collaboration, D. Asner et al., Averages of b-hadron, c-hadron and τ -lepton Properties, arXiv:1010.1589 [INSPIRE].
  25. [25]
    LHCb collaboration, Tagged time-dependent angular analysis of \( B_s^0 \)J/ψφ decays at LHCb, LHCb-CONF-2012-002 (2012).Google Scholar
  26. [26]
    M. Gronau, D. Pirjol and T.-M. Yan, Model independent electroweak penguins in B decays to two pseudoscalars, Phys. Rev. D 60 (1999) 034021 [Erratum ibid. D 69 (2004) 119901] [hep-ph/9810482] [INSPIRE].ADSGoogle Scholar
  27. [27]
    J. Zupan, Penguin pollution estimates relevant for φ(2)/α extraction, Nucl. Phys. Proc. 170 (2007) 33 [hep-ph/0701004] [INSPIRE].ADSCrossRefGoogle Scholar
  28. [28]
    S. Gardner, Towards a precision determination of α in B → ππ decays, Phys. Rev. D 72 (2005) 034015 [hep-ph/0505071] [INSPIRE].ADSGoogle Scholar
  29. [29]
    F. Botella, D. London and J.P. Silva, Looking for ΔI = 5/2 amplitude components in B → ππ and B → ρρ experiments, Phys. Rev. D 73 (2006) 071501 [hep-ph/0602060] [INSPIRE].ADSGoogle Scholar
  30. [30]
    K. De Bruyn et al., Branching ratio measurements of B s decays, Phys. Rev. D 86 (2012) 014027 [arXiv:1204.1735] [INSPIRE].ADSGoogle Scholar
  31. [31]
    UTfit collaboration, M. Bona et al., Model-independent constraints on ΔF = 2 operators and the scale of new physics, JHEP 03 (2008) 049 [arXiv:0707.0636] [INSPIRE].ADSCrossRefGoogle Scholar
  32. [32]
    LHCb collaboration, R. Aaij et al., Measurement of the effective \( B_s^0 \)K + K lifetime, Phys. Lett. B 707 (2012) 349 [arXiv:1111.0521] [INSPIRE].ADSGoogle Scholar
  33. [33]
    LHCb collaboration, Measurement of the effective \( B_s^0 \)K + K lifetime, LHCb-CONF-2012-001 (2012).Google Scholar
  34. [34]
    G. Duplancic and B. Melic, B, B sK form factors: an update of light-cone sum rule results, Phys. Rev. D 78 (2008) 054015 [arXiv:0805.4170] [INSPIRE].ADSGoogle Scholar
  35. [35]
    B. Bhattacharya, A. Datta, M. Imbeault and D. London, Measuring βs with B sK (∗)0 \( \bar{K} \) (∗)0A reappraisal, arXiv:1203.3435 [INSPIRE].

Copyright information

© SISSA, Trieste, Italy 2012

Authors and Affiliations

  • M. Ciuchini
    • 1
  • E. Franco
    • 2
  • S. Mishima
    • 2
  • L. Silvestrini
    • 2
  1. 1.INFN, Sezione di Roma TreRomaItaly
  2. 2.INFN, Sezione di RomaRomaItaly

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