Search for CP violation in D(s)+ ? h+ p0 and decays D(s)+ ? h+ ? decays

R. Aaij; C. Abellan Beteta; T. Ackernley; B. Adeva; M. Adinolfi; H. Afsharnia; C. A. Aidala; S. Aiola; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; A. Alfonso Albero; Z. Aliouche; G. Alkhazov; P. Alvarez Cartelle; S. Amato; Y. Amhis; L. An; L. Anderlini; A. Andreianov; M. Andreotti; F. Archilli; A. Artamonov; M. Artuso; K. Arzymatov; E. Aslanides; M. Atzeni; B. Audurier; S. Bachmann; M. Bachmayer; J. J. Back; P. Baladron Rodriguez; V Balagura; W. Baldini; J. Baptista Leite; R. J. Barlow; S. Barsuk; W. Barter; M. Bartolini; F. Baryshnikov; J. M. Basels; G. Bassi; B. Batsukh; A. Battig; A. Bay; M. Becker; F. Bedeschi; I Bediaga; LHCb collaboration; Marcel Merk; Jacco de Vries; Chris Pawley

doi:10.1007/JHEP06(2021)019

Search for CP violation in D(s)+ ? h+ p0 and decays D(s)+ ? h+ ? decays

R. Aaij, C. Abellan Beteta, T. Ackernley, B. Adeva, M. Adinolfi, H. Afsharnia, C. A. Aidala, S. Aiola, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, Z. Aliouche, G. Alkhazov, P. Alvarez Cartelle, S. Amato, Y. Amhis, L. AnL. Anderlini, A. Andreianov, M. Andreotti, F. Archilli, A. Artamonov, M. Artuso, K. Arzymatov, E. Aslanides, M. Atzeni, B. Audurier, S. Bachmann, M. Bachmayer, J. J. Back, P. Baladron Rodriguez, V Balagura, W. Baldini, J. Baptista Leite, R. J. Barlow, S. Barsuk, W. Barter, M. Bartolini, F. Baryshnikov, J. M. Basels, G. Bassi, B. Batsukh, A. Battig, A. Bay, M. Becker, F. Bedeschi, I Bediaga, LHCb collaboration, Marcel Merk, Jacco de Vries, Chris Pawley

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Searches for CP violation in the two-body decays D-(s)(+) -> h(+)pi(0) and D-(s)(+) -> h(+)eta (where h(+) denotes a pi(+) or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb(-1) or 6 fb(-1) of integrated luminosity. The pi(0) and eta mesons are reconstructed using the e(+) e(-)gamma final state, which can proceed as three-body decays pi(0) -> e(+) e(-) gamma and eta -> e(+) e(-)gamma, or via the two-body decays pi(0) -> gamma gamma and eta -> gamma gamma followed by a photon conversion. The measurements are made relative to the control modes D-(s)(+) K(S)(0)h(+) to cancel the production and detection asymmetries. The CP asymmetries are measured to beA(CP)(D+ -> pi(+)pi(0)) = (-1.3 +/- 0.9 +/- 0.6)%,A(CP)(D+ -> K+pi(0)) = (- 3.2 +/- 4.7 +/- 2.1)%,A(CP)(D+ -> pi(+)eta) = (-0.2 +/- 0.8 +/- 0.4)%,A(CP)(D+ -> K+eta) = (-6 +/- 10 +/- 4 )%,A(CP)(D-s(+) -> K+pi(0)) = (-0.8 +/- 3.9 +/- 1.2)%,A(CP)(D-s(+) -> pi(+)eta) = ( 0.8 +/- 0.7 +/- 0.5)%,A(CP)(D-s(+) -> K+eta) = ( 0.9 +/- 3.7 +/- 1.1)%,where the first uncertainties are statistical and the second systematic. These results are consistent with no CP violation and mostly constitute the most precise measurements of A(CP) in these decay modes to date.

Original language	English
Article number	019
Number of pages	25
Journal	Journal of High Energy Physics
Issue number	6
DOIs	https://doi.org/10.1007/JHEP06(2021)019
Publication status	Published - 3 Jun 2021

Keywords

Charm physics
CP violation
Hadron-Hadron scattering (experiments)
ASYMMETRIES
SIMULATION

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Aaij, R., Beteta, C. A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C. A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Cartelle, P. A., Amato, S., Amhis, Y., ... Pawley, C. (2021). Search for CP violation in D(s)+ ? h+ p0 and decays D(s)+ ? h+ ? decays. Journal of High Energy Physics, (6), Article 019. https://doi.org/10.1007/JHEP06(2021)019

@article{37165cff84924fbfbed7569a53be03c0,

title = "Search for CP violation in D(s)+ ? h+ p0 and decays D(s)+ ? h+ ? decays",

abstract = "Searches for CP violation in the two-body decays D-(s)(+) -> h(+)pi(0) and D-(s)(+) -> h(+)eta (where h(+) denotes a pi(+) or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb(-1) or 6 fb(-1) of integrated luminosity. The pi(0) and eta mesons are reconstructed using the e(+) e(-)gamma final state, which can proceed as three-body decays pi(0) -> e(+) e(-) gamma and eta -> e(+) e(-)gamma, or via the two-body decays pi(0) -> gamma gamma and eta -> gamma gamma followed by a photon conversion. The measurements are made relative to the control modes D-(s)(+) K(S)(0)h(+) to cancel the production and detection asymmetries. The CP asymmetries are measured to beA(CP)(D+ -> pi(+)pi(0)) = (-1.3 +/- 0.9 +/- 0.6)%,A(CP)(D+ -> K+pi(0)) = (- 3.2 +/- 4.7 +/- 2.1)%,A(CP)(D+ -> pi(+)eta) = (-0.2 +/- 0.8 +/- 0.4)%,A(CP)(D+ -> K+eta) = (-6 +/- 10 +/- 4 )%,A(CP)(D-s(+) -> K+pi(0)) = (-0.8 +/- 3.9 +/- 1.2)%,A(CP)(D-s(+) -> pi(+)eta) = ( 0.8 +/- 0.7 +/- 0.5)%,A(CP)(D-s(+) -> K+eta) = ( 0.9 +/- 3.7 +/- 1.1)%,where the first uncertainties are statistical and the second systematic. These results are consistent with no CP violation and mostly constitute the most precise measurements of A(CP) in these decay modes to date.",

keywords = "Charm physics, CP violation, Hadron-Hadron scattering (experiments), ASYMMETRIES, SIMULATION",

author = "R. Aaij and Beteta, {C. Abellan} and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and Aidala, {C. A.} and S. Aiola and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and Z. Aliouche and G. Alkhazov and Cartelle, {P. Alvarez} and S. Amato and Y. Amhis and L. An and L. Anderlini and A. Andreianov and M. Andreotti and F. Archilli and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, {J. J.} and {Baladron Rodriguez}, P. and V Balagura and W. Baldini and Leite, {J. Baptista} and Barlow, {R. J.} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and Basels, {J. M.} and G. Bassi and B. Batsukh and A. Battig and A. Bay and M. Becker and F. Bedeschi and I Bediaga and {LHCb collaboration} and Marcel Merk and {de Vries}, Jacco and Chris Pawley",

year = "2021",

month = jun,

day = "3",

doi = "10.1007/JHEP06(2021)019",

language = "English",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer Verlag",

number = "6",

}

Aaij, R, Beteta, CA, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Aliouche, Z, Alkhazov, G, Cartelle, PA, Amato, S, Amhis, Y, An, L, Anderlini, L, Andreianov, A, Andreotti, M, Archilli, F, Artamonov, A, Artuso, M, Arzymatov, K, Aslanides, E, Atzeni, M, Audurier, B, Bachmann, S, Bachmayer, M, Back, JJ, Baladron Rodriguez, P, Balagura, V, Baldini, W, Leite, JB, Barlow, RJ, Barsuk, S, Barter, W, Bartolini, M, Baryshnikov, F, Basels, JM, Bassi, G, Batsukh, B, Battig, A, Bay, A, Becker, M, Bedeschi, F, Bediaga, I, LHCb collaboration, Merk, M , de Vries, J & Pawley, C 2021, 'Search for CP violation in D(s)+ ? h+ p0 and decays D(s)+ ? h+ ? decays', Journal of High Energy Physics, no. 6, 019. https://doi.org/10.1007/JHEP06(2021)019

Search for CP violation in D(s)+ ? h+ p0 and decays D(s)+ ? h+ ? decays. / Aaij, R.; Beteta, C. Abellan; Ackernley, T. et al.
In: Journal of High Energy Physics, No. 6, 019, 03.06.2021.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Search for CP violation in D(s)+ ? h+ p0 and decays D(s)+ ? h+ ? decays

AU - Aaij, R.

AU - Beteta, C. Abellan

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Aliouche, Z.

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreianov, A.

AU - Andreotti, M.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Baladron Rodriguez, P.

AU - Balagura, V

AU - Baldini, W.

AU - Leite, J. Baptista

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Basels, J. M.

AU - Bassi, G.

AU - Batsukh, B.

AU - Battig, A.

AU - Bay, A.

AU - Becker, M.

AU - Bedeschi, F.

AU - Bediaga, I

AU - LHCb collaboration

AU - Merk, Marcel

AU - de Vries, Jacco

AU - Pawley, Chris

PY - 2021/6/3

Y1 - 2021/6/3

N2 - Searches for CP violation in the two-body decays D-(s)(+) -> h(+)pi(0) and D-(s)(+) -> h(+)eta (where h(+) denotes a pi(+) or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb(-1) or 6 fb(-1) of integrated luminosity. The pi(0) and eta mesons are reconstructed using the e(+) e(-)gamma final state, which can proceed as three-body decays pi(0) -> e(+) e(-) gamma and eta -> e(+) e(-)gamma, or via the two-body decays pi(0) -> gamma gamma and eta -> gamma gamma followed by a photon conversion. The measurements are made relative to the control modes D-(s)(+) K(S)(0)h(+) to cancel the production and detection asymmetries. The CP asymmetries are measured to beA(CP)(D+ -> pi(+)pi(0)) = (-1.3 +/- 0.9 +/- 0.6)%,A(CP)(D+ -> K+pi(0)) = (- 3.2 +/- 4.7 +/- 2.1)%,A(CP)(D+ -> pi(+)eta) = (-0.2 +/- 0.8 +/- 0.4)%,A(CP)(D+ -> K+eta) = (-6 +/- 10 +/- 4 )%,A(CP)(D-s(+) -> K+pi(0)) = (-0.8 +/- 3.9 +/- 1.2)%,A(CP)(D-s(+) -> pi(+)eta) = ( 0.8 +/- 0.7 +/- 0.5)%,A(CP)(D-s(+) -> K+eta) = ( 0.9 +/- 3.7 +/- 1.1)%,where the first uncertainties are statistical and the second systematic. These results are consistent with no CP violation and mostly constitute the most precise measurements of A(CP) in these decay modes to date.

AB - Searches for CP violation in the two-body decays D-(s)(+) -> h(+)pi(0) and D-(s)(+) -> h(+)eta (where h(+) denotes a pi(+) or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb(-1) or 6 fb(-1) of integrated luminosity. The pi(0) and eta mesons are reconstructed using the e(+) e(-)gamma final state, which can proceed as three-body decays pi(0) -> e(+) e(-) gamma and eta -> e(+) e(-)gamma, or via the two-body decays pi(0) -> gamma gamma and eta -> gamma gamma followed by a photon conversion. The measurements are made relative to the control modes D-(s)(+) K(S)(0)h(+) to cancel the production and detection asymmetries. The CP asymmetries are measured to beA(CP)(D+ -> pi(+)pi(0)) = (-1.3 +/- 0.9 +/- 0.6)%,A(CP)(D+ -> K+pi(0)) = (- 3.2 +/- 4.7 +/- 2.1)%,A(CP)(D+ -> pi(+)eta) = (-0.2 +/- 0.8 +/- 0.4)%,A(CP)(D+ -> K+eta) = (-6 +/- 10 +/- 4 )%,A(CP)(D-s(+) -> K+pi(0)) = (-0.8 +/- 3.9 +/- 1.2)%,A(CP)(D-s(+) -> pi(+)eta) = ( 0.8 +/- 0.7 +/- 0.5)%,A(CP)(D-s(+) -> K+eta) = ( 0.9 +/- 3.7 +/- 1.1)%,where the first uncertainties are statistical and the second systematic. These results are consistent with no CP violation and mostly constitute the most precise measurements of A(CP) in these decay modes to date.

KW - Charm physics

KW - CP violation

KW - Hadron-Hadron scattering (experiments)

KW - ASYMMETRIES

KW - SIMULATION

U2 - 10.1007/JHEP06(2021)019

DO - 10.1007/JHEP06(2021)019

M3 - Article

SN - 1029-8479

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 6

M1 - 019

ER -

Search for <i>CP</i> violation in <i>D</i><sub>(<i>s</i>)</sub><SUP>+</SUP> ? <i>h</i><SUP>+</SUP> p<SUP>0</SUP> and decays <i>D</i><sub>(<i>s</i>)</sub><SUP>+</SUP> ? <i>h</i><SUP>+</SUP> ? decays

Abstract

Keywords

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