Measurement of CP asymmetries and polarisation fractions in B<inf>s</inf><sup>0</sup>→K<sup>∗0</sup>K<sup>¯∗0</sup> decays

The LHCb collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonR. Andreassen, M. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, L. J. Bel, S. Belogurov, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, A. Bertolin, M. O. Bettler, M. van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, A. Bursche, J. Buytaert, S. Cadeddu, R. Calabrese, M. Calvi, M. Calvo Gomez, P. Campana, D. Campora Perez, L. Capriotti

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

© 2015, The Author(s). Abstract: An angular analysis of the decay B<inf>s</inf><sup>0</sup>→K<sup>∗0</sup>K<sup>¯∗0</sup> is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb<sup>−1</sup> collected by the LHCb experiment at a centre-of-mass energy √s=7 TeV. A combined angular and mass analysis separates six helicity amplitudes and allows the measurement of the longitudinal polarisation fraction f<inf>L</inf> = 0.201 ± 0.057 (stat.) ± 0.040 (syst.) for the (Formula Presented) decay. A large scalar contribution from the K<inf>0</inf><sup>∗</sup>(1430) and K<inf>0</inf><sup>∗</sup>(800) resonances is found, allowing the determination of additional CP asymmetries. Triple product and direct CP asymmetries are determined to be compatible with the Standard Model expectations. The branching fraction ℬBs→<sup>K∗</sup><sup>8920</sup><sup>K¯∗</sup><sup>8920</sup> is measured to be (10.8 ± 2.1 (stat.) ± 1.4 (syst.) ± 0.6 (f<inf>d</inf>/f<inf>s</inf>)) × 10<sup>−6</sup>.
Original languageEnglish
JournalJournal of High Energy Physics
DOIs
Publication statusPublished - 6 Jul 2015
Externally publishedYes

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asymmetry
decay
polarization
center of mass
luminosity
scalars
collisions
products
energy

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The LHCb collaboration ; Aaij, R. ; Adeva, B. ; Adinolfi, M. ; Affolder, A. ; Ajaltouni, Z. ; Akar, S. ; Albrecht, J. ; Alessio, F. ; Alexander, M. ; Ali, S. ; Alkhazov, G. ; Alvarez Cartelle, P. ; Alves, A. A. ; Amato, S. ; Amerio, S. ; Amhis, Y. ; An, L. ; Anderlini, L. ; Anderson, J. ; Andreassen, R. ; Andreotti, M. ; Andrews, J. E. ; Appleby, R. B. ; Aquines Gutierrez, O. ; Archilli, F. ; Artamonov, A. ; Artuso, M. ; Aslanides, E. ; Auriemma, G. ; Baalouch, M. ; Bachmann, S. ; Back, J. J. ; Badalov, A. ; Baesso, C. ; Baldini, W. ; Barlow, R. J. ; Barschel, C. ; Barsuk, S. ; Barter, W. ; Batozskaya, V. ; Battista, V. ; Bay, A. ; Beaucourt, L. ; Beddow, J. ; Bedeschi, F. ; Bediaga, I. ; Bel, L. J. ; Belogurov, S. ; Belyaev, I. ; Ben-Haim, E. ; Bencivenni, G. ; Benson, S. ; Benton, J. ; Berezhnoy, A. ; Bernet, R. ; Bertolin, A. ; Bettler, M. O. ; van Beuzekom, M. ; Bien, A. ; Bifani, S. ; Bird, T. ; Bizzeti, A. ; Blake, T. ; Blanc, F. ; Blouw, J. ; Blusk, S. ; Bocci, V. ; Bondar, A. ; Bondar, N. ; Bonivento, W. ; Borghi, S. ; Borgia, A. ; Borsato, M. ; Bowcock, T. J.V. ; Bowen, E. ; Bozzi, C. ; Brett, D. ; Britsch, M. ; Britton, T. ; Brodzicka, J. ; Brook, N. H. ; Bursche, A. ; Buytaert, J. ; Cadeddu, S. ; Calabrese, R. ; Calvi, M. ; Calvo Gomez, M. ; Campana, P. ; Campora Perez, D. ; Capriotti, L. / Measurement of CP asymmetries and polarisation fractions in B<inf>s</inf><sup>0</sup>→K<sup>∗0</sup>K<sup>¯∗0</sup> decays. In: Journal of High Energy Physics. 2015.
@article{3f89129e9ddb4710a32e5f4c84a8c394,
title = "Measurement of CP asymmetries and polarisation fractions in Bs0→K∗0K¯∗0 decays",
abstract = "{\circledC} 2015, The Author(s). Abstract: An angular analysis of the decay Bs0→K∗0K¯∗0 is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment at a centre-of-mass energy √s=7 TeV. A combined angular and mass analysis separates six helicity amplitudes and allows the measurement of the longitudinal polarisation fraction fL = 0.201 ± 0.057 (stat.) ± 0.040 (syst.) for the (Formula Presented) decay. A large scalar contribution from the K0∗(1430) and K0∗(800) resonances is found, allowing the determination of additional CP asymmetries. Triple product and direct CP asymmetries are determined to be compatible with the Standard Model expectations. The branching fraction ℬBs→K∗8920K¯∗8920 is measured to be (10.8 ± 2.1 (stat.) ± 1.4 (syst.) ± 0.6 (fd/fs)) × 10−6.",
author = "{The LHCb collaboration} and R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali 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 J. Anderson and R. Andreassen and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and V. Battista and A. Bay and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and Bel, {L. J.} and S. Belogurov and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and R. Bernet and A. Bertolin and Bettler, {M. O.} and {van Beuzekom}, M. and A. Bien and S. Bifani and T. Bird and A. Bizzeti and T. Blake and F. Blanc and J. Blouw and S. Blusk and V. Bocci and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and M. Borsato and Bowcock, {T. J.V.} and E. Bowen and C. Bozzi and D. Brett and M. Britsch and T. Britton and J. Brodzicka and Brook, {N. H.} and A. Bursche and J. Buytaert and S. Cadeddu and R. Calabrese and M. Calvi and {Calvo Gomez}, M. and P. Campana and {Campora Perez}, D. and L. Capriotti",
year = "2015",
month = "7",
day = "6",
doi = "10.1007/JHEP07(2015)166",
language = "English",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Verlag",

}

The LHCb collaboration, Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreassen, R, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Bel, LJ, Belogurov, S, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bertolin, A, Bettler, MO, van Beuzekom, M, Bien, A, Bifani, S, Bird, T, Bizzeti, A, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Borsato, M, Bowcock, TJV, Bowen, E, Bozzi, C, Brett, D, Britsch, M, Britton, T, Brodzicka, J, Brook, NH, Bursche, A, Buytaert, J, Cadeddu, S, Calabrese, R, Calvi, M, Calvo Gomez, M, Campana, P, Campora Perez, D & Capriotti, L 2015, 'Measurement of CP asymmetries and polarisation fractions in B<inf>s</inf><sup>0</sup>→K<sup>∗0</sup>K<sup>¯∗0</sup> decays', Journal of High Energy Physics. https://doi.org/10.1007/JHEP07(2015)166

Measurement of CP asymmetries and polarisation fractions in B<inf>s</inf><sup>0</sup>→K<sup>∗0</sup>K<sup>¯∗0</sup> decays. / The LHCb collaboration; Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A. A.; Amato, S.; Amerio, S.; Amhis, Y.; An, L.; Anderlini, L.; Anderson, J.; Andreassen, R.; Andreotti, M.; Andrews, J. E.; Appleby, R. B.; Aquines Gutierrez, O.; Archilli, F.; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Baalouch, M.; Bachmann, S.; Back, J. J.; Badalov, A.; Baesso, C.; Baldini, W.; Barlow, R. J.; Barschel, C.; Barsuk, S.; Barter, W.; Batozskaya, V.; Battista, V.; Bay, A.; Beaucourt, L.; Beddow, J.; Bedeschi, F.; Bediaga, I.; Bel, L. J.; Belogurov, S.; Belyaev, I.; Ben-Haim, E.; Bencivenni, G.; Benson, S.; Benton, J.; Berezhnoy, A.; Bernet, R.; Bertolin, A.; Bettler, M. O.; van Beuzekom, M.; Bien, A.; Bifani, S.; Bird, T.; Bizzeti, A.; Blake, T.; Blanc, F.; Blouw, J.; Blusk, S.; Bocci, V.; Bondar, A.; Bondar, N.; Bonivento, W.; Borghi, S.; Borgia, A.; Borsato, M.; Bowcock, T. J.V.; Bowen, E.; Bozzi, C.; Brett, D.; Britsch, M.; Britton, T.; Brodzicka, J.; Brook, N. H.; Bursche, A.; Buytaert, J.; Cadeddu, S.; Calabrese, R.; Calvi, M.; Calvo Gomez, M.; Campana, P.; Campora Perez, D.; Capriotti, L.

In: Journal of High Energy Physics, 06.07.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measurement of CP asymmetries and polarisation fractions in Bs0→K∗0K¯∗0 decays

AU - The LHCb collaboration, null

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

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 - Anderson, J.

AU - Andreassen, R.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Bel, L. J.

AU - Belogurov, S.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Berezhnoy, A.

AU - Bernet, R.

AU - Bertolin, A.

AU - Bettler, M. O.

AU - van Beuzekom, M.

AU - Bien, A.

AU - Bifani, S.

AU - Bird, T.

AU - Bizzeti, A.

AU - Blake, T.

AU - Blanc, F.

AU - Blouw, J.

AU - Blusk, S.

AU - Bocci, V.

AU - Bondar, A.

AU - Bondar, N.

AU - Bonivento, W.

AU - Borghi, S.

AU - Borgia, A.

AU - Borsato, M.

AU - Bowcock, T. J.V.

AU - Bowen, E.

AU - Bozzi, C.

AU - Brett, D.

AU - Britsch, M.

AU - Britton, T.

AU - Brodzicka, J.

AU - Brook, N. H.

AU - Bursche, A.

AU - Buytaert, J.

AU - Cadeddu, S.

AU - Calabrese, R.

AU - Calvi, M.

AU - Calvo Gomez, M.

AU - Campana, P.

AU - Campora Perez, D.

AU - Capriotti, L.

PY - 2015/7/6

Y1 - 2015/7/6

N2 - © 2015, The Author(s). Abstract: An angular analysis of the decay Bs0→K∗0K¯∗0 is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment at a centre-of-mass energy √s=7 TeV. A combined angular and mass analysis separates six helicity amplitudes and allows the measurement of the longitudinal polarisation fraction fL = 0.201 ± 0.057 (stat.) ± 0.040 (syst.) for the (Formula Presented) decay. A large scalar contribution from the K0∗(1430) and K0∗(800) resonances is found, allowing the determination of additional CP asymmetries. Triple product and direct CP asymmetries are determined to be compatible with the Standard Model expectations. The branching fraction ℬBs→K∗8920K¯∗8920 is measured to be (10.8 ± 2.1 (stat.) ± 1.4 (syst.) ± 0.6 (fd/fs)) × 10−6.

AB - © 2015, The Author(s). Abstract: An angular analysis of the decay Bs0→K∗0K¯∗0 is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment at a centre-of-mass energy √s=7 TeV. A combined angular and mass analysis separates six helicity amplitudes and allows the measurement of the longitudinal polarisation fraction fL = 0.201 ± 0.057 (stat.) ± 0.040 (syst.) for the (Formula Presented) decay. A large scalar contribution from the K0∗(1430) and K0∗(800) resonances is found, allowing the determination of additional CP asymmetries. Triple product and direct CP asymmetries are determined to be compatible with the Standard Model expectations. The branching fraction ℬBs→K∗8920K¯∗8920 is measured to be (10.8 ± 2.1 (stat.) ± 1.4 (syst.) ± 0.6 (fd/fs)) × 10−6.

U2 - 10.1007/JHEP07(2015)166

DO - 10.1007/JHEP07(2015)166

M3 - Article

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

ER -