Determination of the quark coupling strength /Vub/ using baryonic decays

The LHCb collaboration

doi:10.1038/nphys3415

Determination of the quark coupling strength /V_ub/ using baryonic decays

The LHCb collaboration

Facultat Internacional de Comerç i Economia Digital La Salle

Producció científica: Article en revista indexada › Article › Avaluat per experts

151 Cites (Scopus)

Resum

In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, /V_ub/ and /V_cb/, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collider, the probability for the Λ_b ⁰ baryon to decay into the pμ^-v_μ final state relative to the Λ_c ⁺μ^-v_μ final state is measured. Combined with theoretical calculations of the strong interaction and a previously measured value of /V_cb/, the first /V_ub/ measurement to use a baryonic decay is performed. This measurement is consistent with previous determinations of /V_ub/ using B meson decays to specific final states and confirms the existing incompatibility with those using an inclusive sample of final states.

Idioma original	Anglès
Pàgines (de-a)	743-747
Nombre de pàgines	5
Revista	Nature Physics
Volum	11
Número	9
DOIs	https://doi.org/10.1038/nphys3415
Estat de la publicació	Publicada - 4 de set. 2015

Accés al document

10.1038/nphys3415

Altres arxius i enllaços

Link to publication in Scopus

Com citar-ho

@article{878bd27ee33649069006ed55b62da299,

title = "Determination of the quark coupling strength /Vub/ using baryonic decays",

abstract = "In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, /Vub/ and /Vcb/, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collider, the probability for the Λb 0 baryon to decay into the pμ-vμ final state relative to the Λc +μ-vμ final state is measured. Combined with theoretical calculations of the strong interaction and a previously measured value of /Vcb/, the first /Vub/ measurement to use a baryonic decay is performed. This measurement is consistent with previous determinations of /Vub/ using B meson decays to specific final states and confirms the existing incompatibility with those using an inclusive sample of final states.",

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 Cartelle, {P. Alvarez} and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and J. Anderson and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and Gutierrez, {O. Aquines} 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 I. Belyaev and E. Ben-Haim and Gomez, {M. Calvo} and X. Vilasis-Cardona",

year = "2015",

month = sep,

day = "4",

doi = "10.1038/nphys3415",

language = "English",

volume = "11",

pages = "743--747",

journal = "Nature Physics",

issn = "1745-2473",

publisher = "Nature Publishing Group",

number = "9",

}

TY - JOUR

T1 - Determination of the quark coupling strength /Vub/ using baryonic decays

AU - The LHCb collaboration

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 - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Gutierrez, O. Aquines

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 - Belyaev, I.

AU - Ben-Haim, E.

AU - Gomez, M. Calvo

AU - Vilasis-Cardona, X.

PY - 2015/9/4

Y1 - 2015/9/4

N2 - In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, /Vub/ and /Vcb/, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collider, the probability for the Λb 0 baryon to decay into the pμ-vμ final state relative to the Λc +μ-vμ final state is measured. Combined with theoretical calculations of the strong interaction and a previously measured value of /Vcb/, the first /Vub/ measurement to use a baryonic decay is performed. This measurement is consistent with previous determinations of /Vub/ using B meson decays to specific final states and confirms the existing incompatibility with those using an inclusive sample of final states.

AB - In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, /Vub/ and /Vcb/, are governed by the coupling of the quarks to the Higgs boson. Using data from the LHCb experiment at the Large Hadron Collider, the probability for the Λb 0 baryon to decay into the pμ-vμ final state relative to the Λc +μ-vμ final state is measured. Combined with theoretical calculations of the strong interaction and a previously measured value of /Vcb/, the first /Vub/ measurement to use a baryonic decay is performed. This measurement is consistent with previous determinations of /Vub/ using B meson decays to specific final states and confirms the existing incompatibility with those using an inclusive sample of final states.

UR - http://www.scopus.com/inward/record.url?scp=84940765133&partnerID=8YFLogxK

U2 - 10.1038/nphys3415

DO - 10.1038/nphys3415

M3 - Article

AN - SCOPUS:84940765133

SN - 1745-2473

VL - 11

SP - 743

EP - 747

JO - Nature Physics

JF - Nature Physics

IS - 9