Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B̄)→ρ+ρ- decays

B. Aubert; R. Barate; D. Boutigny; F. Couderc; Y. Karyotakis; J. P. Lees; V. Poireau; V. Tisserand; A. Zghiche; E. Grauges; A. Palano; M. Pappagallo; A. Pompili; J. C. Chen; N. D. Qi; G. Rong; P. Wang; Y. S. Zhu; G. Eigen; I. Ofte; B. Stugu; G. S. Abrams; A. W. Borgland; A. B. Breon; D. N. Brown; J. Button-Shafer; R. N. Cahn; E. Charles; C. T. Day; M. S. Gill; A. V. Gritsan; Y. Groysman; R. G. Jacobsen; R. W. Kadel; J. Kadyk; L. T. Kerth; Yu G. Kolomensky; G. Kukartsev; G. Lynch; L. M. Mir; P. J. Oddone; T. J. Orimoto; M. Pripstein; N. A. Roe; M. T. Ronan; W. A. Wenzel; M. Barrett; K. E. Ford; T. J. Harrison; A. J. Hart; C. M. Hawkes; S. E. Morgan; A. T. Watson; M. Fritsch; K. Goetzen; T. Held; H. Koch; B. Lewandowski; M. Pelizaeus; K. Peters; T. Schroeder; M. Steinke; J. T. Boyd; J. P. Burke; N. Chevalier; W. N. Cottingham; M. P. Kelly; T. Cuhadar-Donszelmann; C. Hearty; N. S. Knecht; T. S. Mattison; J. A. McKenna; D. Thiessen; A. Khan; P. Kyberd; L. Teodorescu; A. E. Blinov; V. E. Blinov; A. D. Bukin; V. P. Druzhinin; V. B. Golubev; V. N. Ivanchenko; E. A. Kravchenko; A. P. Onuchin; S. I. Serednyakov; Yu I. Skovpen; E. P. Solodov; A. N. Yushkov; D. Best; M. Bondioli; M. Bruinsma; M. Chao; I. Eschrich; D. Kirkby; A. J. Lankford; M. Mandelkern; R. K. Mommsen; W. Roethel; D. P. Stoker

doi:10.1103/PhysRevLett.95.041805

Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B̄)→ρ+ρ- decays

B. Aubert, R. Barate, D. Boutigny, F. Couderc, Y. Karyotakis, J. P. Lees, V. Poireau, V. Tisserand, A. Zghiche, E. Grauges, A. Palano, M. Pappagallo, A. Pompili, J. C. Chen, N. D. Qi, G. Rong, P. Wang, Y. S. Zhu, G. Eigen, I. OfteB. Stugu, G. S. Abrams, A. W. Borgland, A. B. Breon, D. N. Brown, J. Button-Shafer, R. N. Cahn, E. Charles, C. T. Day, M. S. Gill, A. V. Gritsan, Y. Groysman, R. G. Jacobsen, R. W. Kadel, J. Kadyk, L. T. Kerth, Yu G. Kolomensky, G. Kukartsev, G. Lynch, L. M. Mir, P. J. Oddone, T. J. Orimoto, M. Pripstein, N. A. Roe, M. T. Ronan, W. A. Wenzel, M. Barrett, K. E. Ford, T. J. Harrison, A. J. Hart, C. M. Hawkes, S. E. Morgan, A. T. Watson, M. Fritsch, K. Goetzen, T. Held, H. Koch, B. Lewandowski, M. Pelizaeus, K. Peters, T. Schroeder, M. Steinke, J. T. Boyd, J. P. Burke, N. Chevalier, W. N. Cottingham, M. P. Kelly, T. Cuhadar-Donszelmann, C. Hearty, N. S. Knecht, T. S. Mattison, J. A. McKenna, D. Thiessen, A. Khan, P. Kyberd, L. Teodorescu, A. E. Blinov, V. E. Blinov, A. D. Bukin, V. P. Druzhinin, V. B. Golubev, V. N. Ivanchenko, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu I. Skovpen, E. P. Solodov, A. N. Yushkov, D. Best, M. Bondioli, M. Bruinsma, M. Chao, I. Eschrich, D. Kirkby, A. J. Lankford, M. Mandelkern, R. K. Mommsen, W. Roethel, D. P. Stoker

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Abstract

We present results from an analysis of B0(B̄0)→ρ+ρ- using 232×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction fL=0.978±0.014(stat)+0.021-0.029(syst) and the CP-violating parameters SL=-0.33±0.24(stat)+0.08-0.14(syst) and CL=-0.03±0.18(stat)±0.09(syst). Using an isospin analysis of B→ρρ decays, we determine the unitarity triangle parameter α. The solution compatible with the standard model is α=(100±13) °.

Original language	English (US)
Article number	041805
Journal	Physical review letters
Volume	95
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.95.041805
State	Published - Jul 22 2005
Externally published	Yes

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10.1103/PhysRevLett.95.041805

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Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Pappagallo, M., Pompili, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., ... Stoker, D. P. (2005). Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B̄)→ρ+ρ- decays. Physical review letters, 95(4), Article 041805. https://doi.org/10.1103/PhysRevLett.95.041805

Aubert, B, Barate, R, Boutigny, D, Couderc, F, Karyotakis, Y, Lees, JP, Poireau, V, Tisserand, V, Zghiche, A, Grauges, E, Palano, A, Pappagallo, M, Pompili, A, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Ofte, I, Stugu, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Charles, E, Day, CT, Gill, MS, Gritsan, AV, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kolomensky, YG, Kukartsev, G, Lynch, G, Mir, LM, Oddone, PJ, Orimoto, TJ, Pripstein, M, Roe, NA, Ronan, MT, Wenzel, WA, Barrett, M, Ford, KE, Harrison, TJ, Hart, AJ, Hawkes, CM, Morgan, SE, Watson, AT, Fritsch, M, Goetzen, K, Held, T, Koch, H, Lewandowski, B, Pelizaeus, M, Peters, K, Schroeder, T, Steinke, M, Boyd, JT, Burke, JP, Chevalier, N, Cottingham, WN, Kelly, MP, Cuhadar-Donszelmann, T, Hearty, C, Knecht, NS, Mattison, TS, McKenna, JA, Thiessen, D, Khan, A, Kyberd, P, Teodorescu, L, Blinov, AE, Blinov, VE, Bukin, AD, Druzhinin, VP, Golubev, VB, Ivanchenko, VN, Kravchenko, EA, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Yushkov, AN, Best, D, Bondioli, M, Bruinsma, M, Chao, M, Eschrich, I, Kirkby, D, Lankford, AJ, Mandelkern, M, Mommsen, RK, Roethel, W & Stoker, DP 2005, 'Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B̄)→ρ+ρ- decays', Physical review letters, vol. 95, no. 4, 041805. https://doi.org/10.1103/PhysRevLett.95.041805

@article{71ce6a61ebfe412090a3919c68573de0,

title = "Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0({\=B})→ρ+ρ- decays",

abstract = "We present results from an analysis of B0({\=B}0)→ρ+ρ- using 232×106 Υ(4S)→B{\=B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction fL=0.978±0.014(stat)+0.021-0.029(syst) and the CP-violating parameters SL=-0.33±0.24(stat)+0.08-0.14(syst) and CL=-0.03±0.18(stat)±0.09(syst). Using an isospin analysis of B→ρρ decays, we determine the unitarity triangle parameter α. The solution compatible with the standard model is α=(100±13) °.",

author = "B. Aubert and R. Barate and D. Boutigny and F. Couderc and Y. Karyotakis and Lees, {J. P.} and V. Poireau and V. Tisserand and A. Zghiche and E. Grauges and A. Palano and M. Pappagallo and A. Pompili and Chen, {J. C.} and Qi, {N. D.} and G. Rong and P. Wang and Zhu, {Y. S.} and G. Eigen and I. Ofte and B. Stugu and Abrams, {G. S.} and Borgland, {A. W.} and Breon, {A. B.} and Brown, {D. N.} and J. Button-Shafer and Cahn, {R. N.} and E. Charles and Day, {C. T.} and Gill, {M. S.} and Gritsan, {A. V.} and Y. Groysman and Jacobsen, {R. G.} and Kadel, {R. W.} and J. Kadyk and Kerth, {L. T.} and Kolomensky, {Yu G.} and G. Kukartsev and G. Lynch and Mir, {L. M.} and Oddone, {P. J.} and Orimoto, {T. J.} and M. Pripstein and Roe, {N. A.} and Ronan, {M. T.} and Wenzel, {W. A.} and M. Barrett and Ford, {K. E.} and Harrison, {T. J.} and Hart, {A. J.} and Hawkes, {C. M.} and Morgan, {S. E.} and Watson, {A. T.} and M. Fritsch and K. Goetzen and T. Held and H. Koch and B. Lewandowski and M. Pelizaeus and K. Peters and T. Schroeder and M. Steinke and Boyd, {J. T.} and Burke, {J. P.} and N. Chevalier and Cottingham, {W. N.} and Kelly, {M. P.} and T. Cuhadar-Donszelmann and C. Hearty and Knecht, {N. S.} and Mattison, {T. S.} and McKenna, {J. A.} and D. Thiessen and A. Khan and P. Kyberd and L. Teodorescu and Blinov, {A. E.} and Blinov, {V. E.} and Bukin, {A. D.} and Druzhinin, {V. P.} and Golubev, {V. B.} and Ivanchenko, {V. N.} and Kravchenko, {E. A.} and Onuchin, {A. P.} and Serednyakov, {S. I.} and Skovpen, {Yu I.} and Solodov, {E. P.} and Yushkov, {A. N.} and D. Best and M. Bondioli and M. Bruinsma and M. Chao and I. Eschrich and D. Kirkby and Lankford, {A. J.} and M. Mandelkern and Mommsen, {R. K.} and W. Roethel and Stoker, {D. P.}",

year = "2005",

month = jul,

day = "22",

doi = "10.1103/PhysRevLett.95.041805",

language = "English (US)",

volume = "95",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "4",

}

TY - JOUR

T1 - Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B̄)→ρ+ρ- decays

AU - Aubert, B.

AU - Barate, R.

AU - Boutigny, D.

AU - Couderc, F.

AU - Karyotakis, Y.

AU - Lees, J. P.

AU - Poireau, V.

AU - Tisserand, V.

AU - Zghiche, A.

AU - Grauges, E.

AU - Palano, A.

AU - Pappagallo, M.

AU - Pompili, A.

AU - Chen, J. C.

AU - Qi, N. D.

AU - Rong, G.

AU - Wang, P.

AU - Zhu, Y. S.

AU - Eigen, G.

AU - Ofte, I.

AU - Stugu, B.

AU - Abrams, G. S.

AU - Borgland, A. W.

AU - Breon, A. B.

AU - Brown, D. N.

AU - Button-Shafer, J.

AU - Cahn, R. N.

AU - Charles, E.

AU - Day, C. T.

AU - Gill, M. S.

AU - Gritsan, A. V.

AU - Groysman, Y.

AU - Jacobsen, R. G.

AU - Kadel, R. W.

AU - Kadyk, J.

AU - Kerth, L. T.

AU - Kolomensky, Yu G.

AU - Kukartsev, G.

AU - Lynch, G.

AU - Mir, L. M.

AU - Oddone, P. J.

AU - Orimoto, T. J.

AU - Pripstein, M.

AU - Roe, N. A.

AU - Ronan, M. T.

AU - Wenzel, W. A.

AU - Barrett, M.

AU - Ford, K. E.

AU - Harrison, T. J.

AU - Hart, A. J.

AU - Hawkes, C. M.

AU - Morgan, S. E.

AU - Watson, A. T.

AU - Fritsch, M.

AU - Goetzen, K.

AU - Held, T.

AU - Koch, H.

AU - Lewandowski, B.

AU - Pelizaeus, M.

AU - Peters, K.

AU - Schroeder, T.

AU - Steinke, M.

AU - Boyd, J. T.

AU - Burke, J. P.

AU - Chevalier, N.

AU - Cottingham, W. N.

AU - Kelly, M. P.

AU - Cuhadar-Donszelmann, T.

AU - Hearty, C.

AU - Knecht, N. S.

AU - Mattison, T. S.

AU - McKenna, J. A.

AU - Thiessen, D.

AU - Khan, A.

AU - Kyberd, P.

AU - Teodorescu, L.

AU - Blinov, A. E.

AU - Blinov, V. E.

AU - Bukin, A. D.

AU - Druzhinin, V. P.

AU - Golubev, V. B.

AU - Ivanchenko, V. N.

AU - Kravchenko, E. A.

AU - Onuchin, A. P.

AU - Serednyakov, S. I.

AU - Skovpen, Yu I.

AU - Solodov, E. P.

AU - Yushkov, A. N.

AU - Best, D.

AU - Bondioli, M.

AU - Bruinsma, M.

AU - Chao, M.

AU - Eschrich, I.

AU - Kirkby, D.

AU - Lankford, A. J.

AU - Mandelkern, M.

AU - Mommsen, R. K.

AU - Roethel, W.

AU - Stoker, D. P.

PY - 2005/7/22

Y1 - 2005/7/22

N2 - We present results from an analysis of B0(B̄0)→ρ+ρ- using 232×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction fL=0.978±0.014(stat)+0.021-0.029(syst) and the CP-violating parameters SL=-0.33±0.24(stat)+0.08-0.14(syst) and CL=-0.03±0.18(stat)±0.09(syst). Using an isospin analysis of B→ρρ decays, we determine the unitarity triangle parameter α. The solution compatible with the standard model is α=(100±13) °.

AB - We present results from an analysis of B0(B̄0)→ρ+ρ- using 232×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction fL=0.978±0.014(stat)+0.021-0.029(syst) and the CP-violating parameters SL=-0.33±0.24(stat)+0.08-0.14(syst) and CL=-0.03±0.18(stat)±0.09(syst). Using an isospin analysis of B→ρρ decays, we determine the unitarity triangle parameter α. The solution compatible with the standard model is α=(100±13) °.

UR - http://www.scopus.com/inward/record.url?scp=27144438988&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27144438988&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.95.041805

DO - 10.1103/PhysRevLett.95.041805

M3 - Article

AN - SCOPUS:27144438988

SN - 0031-9007

VL - 95

JO - Physical review letters

JF - Physical review letters

IS - 4

M1 - 041805

ER -

Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B̄)→ρ+ρ- decays

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