Standard

Extraction of form Factors from a Four-Dimensional Angular Analysis of B →d∗-ν. / <i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration.

In: Physical Review Letters, Vol. 123, No. 9, 091801, 29.08.2019.

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

Harvard

<i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration 2019, 'Extraction of form Factors from a Four-Dimensional Angular Analysis of B →d∗-ν', Physical Review Letters, vol. 123, no. 9, 091801. https://doi.org/10.1103/PhysRevLett.123.091801

APA

<i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration (2019). Extraction of form Factors from a Four-Dimensional Angular Analysis of B →d∗-ν. Physical Review Letters, 123(9), [091801]. https://doi.org/10.1103/PhysRevLett.123.091801

Vancouver

<i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration. Extraction of form Factors from a Four-Dimensional Angular Analysis of B →d∗-ν. Physical Review Letters. 2019 Aug 29;123(9):091801. doi: 10.1103/PhysRevLett.123.091801

Author

<i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration. / Extraction of form Factors from a Four-Dimensional Angular Analysis of B →d∗-ν. In: Physical Review Letters. 2019 ; Vol. 123, No. 9.

BibTeX

@article{922d7ad107c24de1a5ad7e6f3ccf6bce,
title = "Extraction of form Factors from a Four-Dimensional Angular Analysis of B →d∗-ν",
abstract = "An angular analysis of the decay B→D∗-ν, {e,μ}, is reported using the full e+e-collision data set collected by the BABAR experiment at the (4S) resonance. One B meson from the (4S)→BB decay is fully reconstructed in a hadronic decay mode, which constrains the kinematics and provides a determination of the neutrino momentum vector. The kinematics of the semileptonic decay is described by the dilepton mass squared, q2, and three angles. The first unbinned fit to the full four-dimensional decay rate in the standard model is performed in the so-called Boyd-Grinstein-Lebed approach, which employs a generic q2 parametrization of the underlying form factors based on crossing symmetry, analyticity, and QCD dispersion relations for the amplitudes. A fit using the more model-dependent Caprini-Lellouch-Neubert (CLN) approach is performed as well. Our form factor shapes show deviations from previous fits based on the CLN parametrization. The latest form factors also provide an updated prediction for the branching fraction ratio R(D∗)B(B→D∗τ-ντ)/B(B→D∗-ν)=0.253±0.005. Finally, using the well-measured branching fraction for the B→D∗-ν decay, a value of |Vcb|=(38.36±0.90)×10-3 is obtained that is consistent with the current world average for exclusive B→D(∗)-ν decays and remains in tension with the determination from inclusive semileptonic B decays to final states with charm.",
keywords = "CB-VERTICAL-BAR, DISPERSIVE BOUNDS, BABAR DETECTOR",
author = "{<i>B<span class={"}sc{"}>a</span>B<span class={"}sc{"}>ar</span></i> Collaboration} and Lees, {J. P.} and V. Poireau and V. Tisserand and E. Grauges and A. Palano and G. Eigen and Brown, {D. N.} and Kolomensky, {Yu G.} and M. Fritsch and H. Koch and T. Schroeder and C. Hearty and Mattison, {T. S.} and McKenna, {J. A.} and So, {R. Y.} and Blinov, {V. E.} and Buzykaev, {A. R.} and Druzhinin, {V. P.} and Golubev, {V. B.} and Kozyrev, {E. A.} and Kravchenko, {E. A.} and Onuchin, {A. P.} and Serednyakov, {S. I.} and Skovpen, {Yu I.} and Solodov, {E. P.} and Todyshev, {K. Yu} and Lankford, {A. J.} and B. Dey and Gary, {J. W.} and O. Long and Eisner, {A. M.} and Lockman, {W. S.} and {Panduro Vazquez}, W. and Chao, {D. S.} and Cheng, {C. H.} and B. Echenard and Flood, {K. T.} and Hitlin, {D. G.} and J. Kim and Y. Li and Miyashita, {T. S.} and P. Ongmongkolkul and Porter, {F. C.} and M. R{\"o}hrken and Z. Huard and Meadows, {B. T.} and Pushpawela, {B. G.} and Sokoloff, {M. D.} and L. Sun and Smith, {J. G.}",
note = "Publisher Copyright: {\textcopyright} 2019 authors.",
year = "2019",
month = aug,
day = "29",
doi = "10.1103/PhysRevLett.123.091801",
language = "English",
volume = "123",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",

}

RIS

TY - JOUR

T1 - Extraction of form Factors from a Four-Dimensional Angular Analysis of B →d∗-ν

AU - <i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration

AU - Lees, J. P.

AU - Poireau, V.

AU - Tisserand, V.

AU - Grauges, E.

AU - Palano, A.

AU - Eigen, G.

AU - Brown, D. N.

AU - Kolomensky, Yu G.

AU - Fritsch, M.

AU - Koch, H.

AU - Schroeder, T.

AU - Hearty, C.

AU - Mattison, T. S.

AU - McKenna, J. A.

AU - So, R. Y.

AU - Blinov, V. E.

AU - Buzykaev, A. R.

AU - Druzhinin, V. P.

AU - Golubev, V. B.

AU - Kozyrev, E. A.

AU - Kravchenko, E. A.

AU - Onuchin, A. P.

AU - Serednyakov, S. I.

AU - Skovpen, Yu I.

AU - Solodov, E. P.

AU - Todyshev, K. Yu

AU - Lankford, A. J.

AU - Dey, B.

AU - Gary, J. W.

AU - Long, O.

AU - Eisner, A. M.

AU - Lockman, W. S.

AU - Panduro Vazquez, W.

AU - Chao, D. S.

AU - Cheng, C. H.

AU - Echenard, B.

AU - Flood, K. T.

AU - Hitlin, D. G.

AU - Kim, J.

AU - Li, Y.

AU - Miyashita, T. S.

AU - Ongmongkolkul, P.

AU - Porter, F. C.

AU - Röhrken, M.

AU - Huard, Z.

AU - Meadows, B. T.

AU - Pushpawela, B. G.

AU - Sokoloff, M. D.

AU - Sun, L.

AU - Smith, J. G.

N1 - Publisher Copyright: © 2019 authors.

PY - 2019/8/29

Y1 - 2019/8/29

N2 - An angular analysis of the decay B→D∗-ν, {e,μ}, is reported using the full e+e-collision data set collected by the BABAR experiment at the (4S) resonance. One B meson from the (4S)→BB decay is fully reconstructed in a hadronic decay mode, which constrains the kinematics and provides a determination of the neutrino momentum vector. The kinematics of the semileptonic decay is described by the dilepton mass squared, q2, and three angles. The first unbinned fit to the full four-dimensional decay rate in the standard model is performed in the so-called Boyd-Grinstein-Lebed approach, which employs a generic q2 parametrization of the underlying form factors based on crossing symmetry, analyticity, and QCD dispersion relations for the amplitudes. A fit using the more model-dependent Caprini-Lellouch-Neubert (CLN) approach is performed as well. Our form factor shapes show deviations from previous fits based on the CLN parametrization. The latest form factors also provide an updated prediction for the branching fraction ratio R(D∗)B(B→D∗τ-ντ)/B(B→D∗-ν)=0.253±0.005. Finally, using the well-measured branching fraction for the B→D∗-ν decay, a value of |Vcb|=(38.36±0.90)×10-3 is obtained that is consistent with the current world average for exclusive B→D(∗)-ν decays and remains in tension with the determination from inclusive semileptonic B decays to final states with charm.

AB - An angular analysis of the decay B→D∗-ν, {e,μ}, is reported using the full e+e-collision data set collected by the BABAR experiment at the (4S) resonance. One B meson from the (4S)→BB decay is fully reconstructed in a hadronic decay mode, which constrains the kinematics and provides a determination of the neutrino momentum vector. The kinematics of the semileptonic decay is described by the dilepton mass squared, q2, and three angles. The first unbinned fit to the full four-dimensional decay rate in the standard model is performed in the so-called Boyd-Grinstein-Lebed approach, which employs a generic q2 parametrization of the underlying form factors based on crossing symmetry, analyticity, and QCD dispersion relations for the amplitudes. A fit using the more model-dependent Caprini-Lellouch-Neubert (CLN) approach is performed as well. Our form factor shapes show deviations from previous fits based on the CLN parametrization. The latest form factors also provide an updated prediction for the branching fraction ratio R(D∗)B(B→D∗τ-ντ)/B(B→D∗-ν)=0.253±0.005. Finally, using the well-measured branching fraction for the B→D∗-ν decay, a value of |Vcb|=(38.36±0.90)×10-3 is obtained that is consistent with the current world average for exclusive B→D(∗)-ν decays and remains in tension with the determination from inclusive semileptonic B decays to final states with charm.

KW - CB-VERTICAL-BAR

KW - DISPERSIVE BOUNDS

KW - BABAR DETECTOR

UR - http://www.scopus.com/inward/record.url?scp=85072231732&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.123.091801

DO - 10.1103/PhysRevLett.123.091801

M3 - Article

C2 - 31524470

AN - SCOPUS:85072231732

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 9

M1 - 091801

ER -

ID: 21538709