Study of the B 0 → ρ(770)°K * (892) 0 decay with an amplitude analysis of B 0 → (π + π )(K + π ) decays

The LHCb Collaboration, Alexander Rudolfovich Wagner

Research output: Contribution to journalArticle

Abstract

An amplitude analysis of B 0 → (π + π )(K + π ) decays is performed in the two-body invariant mass regions 300 < m(π + π ) < 1100 MeV/c 2 , accounting for the ρ 0 , ω, f 0 (500), f 0 (980) and f 0 (1370) resonances, and 750 < m(K + π ) < 1200 MeV/c 2 , which is dominated by the K * (892) 0 meson. The analysis uses 3 fb −1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The CP averages and asymmetries are measured for the magnitudes and phase differences of the con- tributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be f˜ρK*0 = 0.164 ± 0.015 ± 0.022 and f˜ωK*0 = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, AρK*0 = −0.62 ± 0.09 ± 0.09 and AωK*0 = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.[Figure not available: see fulltext.].

Original languageEnglish
Article number26
JournalJournal of High Energy Physics
Volume2019
Issue number5
DOIs
Publication statusPublished - 1 May 2019

Fingerprint

asymmetry
protons
decay
center of mass
mesons
collisions
polarization
energy

Keywords

  • B physics
  • CP violation
  • Hadron-Hadron scattering (experiments)
  • Polarization

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

@article{a88b76986bc441dfba90a2d625f718e0,
title = "Study of the B 0 → ρ(770)°K * (892) 0 decay with an amplitude analysis of B 0 → (π + π − )(K + π − ) decays",
abstract = "An amplitude analysis of B 0 → (π + π − )(K + π − ) decays is performed in the two-body invariant mass regions 300 < m(π + π − ) < 1100 MeV/c 2 , accounting for the ρ 0 , ω, f 0 (500), f 0 (980) and f 0 (1370) resonances, and 750 < m(K + π − ) < 1200 MeV/c 2 , which is dominated by the K * (892) 0 meson. The analysis uses 3 fb −1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The CP averages and asymmetries are measured for the magnitudes and phase differences of the con- tributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be f˜ρK*0 = 0.164 ± 0.015 ± 0.022 and f˜ωK*0 = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, AρK*0 = −0.62 ± 0.09 ± 0.09 and AωK*0 = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.[Figure not available: see fulltext.].",
keywords = "B physics, CP violation, Hadron-Hadron scattering (experiments), Polarization",
author = "{The LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and B. Adeva and M. Adinolfi and Aidala, {C. A.} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and F. Archilli and P. d’Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, {R. J.} and Barrand, {G. C.} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and V. Batozskaya and B. Batsukh and A. Battig and V. Battista and A. Petrov and S. Strokov and Wagner, {Alexander Rudolfovich}",
year = "2019",
month = "5",
day = "1",
doi = "10.1007/JHEP05(2019)026",
language = "English",
volume = "2019",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Verlag",
number = "5",

}

TY - JOUR

T1 - Study of the B 0 → ρ(770)°K * (892) 0 decay with an amplitude analysis of B 0 → (π + π − )(K + π − ) decays

AU - The LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Archilli, F.

AU - d’Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barrand, G. C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battig, A.

AU - Battista, V.

AU - Petrov, A.

AU - Strokov, S.

AU - Wagner, Alexander Rudolfovich

PY - 2019/5/1

Y1 - 2019/5/1

N2 - An amplitude analysis of B 0 → (π + π − )(K + π − ) decays is performed in the two-body invariant mass regions 300 < m(π + π − ) < 1100 MeV/c 2 , accounting for the ρ 0 , ω, f 0 (500), f 0 (980) and f 0 (1370) resonances, and 750 < m(K + π − ) < 1200 MeV/c 2 , which is dominated by the K * (892) 0 meson. The analysis uses 3 fb −1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The CP averages and asymmetries are measured for the magnitudes and phase differences of the con- tributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be f˜ρK*0 = 0.164 ± 0.015 ± 0.022 and f˜ωK*0 = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, AρK*0 = −0.62 ± 0.09 ± 0.09 and AωK*0 = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.[Figure not available: see fulltext.].

AB - An amplitude analysis of B 0 → (π + π − )(K + π − ) decays is performed in the two-body invariant mass regions 300 < m(π + π − ) < 1100 MeV/c 2 , accounting for the ρ 0 , ω, f 0 (500), f 0 (980) and f 0 (1370) resonances, and 750 < m(K + π − ) < 1200 MeV/c 2 , which is dominated by the K * (892) 0 meson. The analysis uses 3 fb −1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The CP averages and asymmetries are measured for the magnitudes and phase differences of the con- tributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be f˜ρK*0 = 0.164 ± 0.015 ± 0.022 and f˜ωK*0 = 0.68 ± 0.17 ± 0.16, and their CP asymmetries, AρK*0 = −0.62 ± 0.09 ± 0.09 and AωK*0 = −0.13 ± 0.27 ± 0.13, where the first uncertainty is statistical and the second systematic.[Figure not available: see fulltext.].

KW - B physics

KW - CP violation

KW - Hadron-Hadron scattering (experiments)

KW - Polarization

UR - http://www.scopus.com/inward/record.url?scp=85065638313&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85065638313&partnerID=8YFLogxK

U2 - 10.1007/JHEP05(2019)026

DO - 10.1007/JHEP05(2019)026

M3 - Article

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 5

M1 - 26

ER -