Measurement of forward W -> e nu production in pp collisions at root s=8 TeV

R. Aaij; B. Adeva; M. Adinolfi; 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; G. Andreassi; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; P. d'Argent; J. Arnau Romeu; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; I. Babuschkin; S. Bachmann; J. J. Back; A. Badalov; C. Baesso; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; V. Batozskaya; B. Batsukh; V. Battista; L. Beaucourt; J. Beddow; F. Bedeschi; I. Bediaga; C. J. G. Onderwater; A. Pellegrino; S. Tolk; LHCb Collaboration

doi:10.1007/JHEP10(2016)030

Measurement of forward W -> e nu production in pp collisions at root s=8 TeV

R. Aaij^*
, B. Adeva
, M. Adinolfi
, 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
, G. Andreassi
, M. Andreotti
, J. E. Andrews

R. B. Appleby, O. Aquines Gutierrez, F. Archilli, P. d'Argent, J. Arnau Romeu, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, I. Babuschkin, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, B. Batsukh, V. Battista, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, C. J. G. Onderwater, A. Pellegrino, S. Tolk, LHCb Collaboration

^*Corresponding author for this work

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

53 Citations (Scopus)

265 Downloads (Pure)

Abstract

A measurement of the cross-section for W -> e nu production in pp collisions is presented using data corresponding to an integrated luminosity of 2 fb(-1) collected by the LHCb experiment at a centre-of-mass energy of root s = 8 TeV. The electrons are required to have more than 20 GeV of transverse momentum and to lie between 2.00 and 4.25 in pseudorapidity. The inclusive W production cross-sections, where the W decays to e nu, are measured to be

W-sigma(+)-> e(+)nu(e)= 1124.4 +/- 2.1 +/- 21.5 +/- 11.2 +/- 13.0 pb, W-sigma(-)-> e(-)(nu) over bar (e) = 809.0 +/- 1.9 +/- 18.1 +/- 7.0 +/- 9.4 pb,

where the first uncertainties are statistical, the second are systematic, the third are due to the knowledge of the LHC beam energy and the fourth are due to the luminosity determination.

Differential cross-sections as a function of the electron pseudorapidity are measured. The W+/W- cross-section ratio and production charge asymmetry are also reported. Results are compared with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. Finally, in a precise test of lepton universality, the ratio of W boson branching fractions is determined to be

B(W -> e nu)/B(W -> mu nu) = 1.020 +/- 0.002 +/- 0.019,

where the first uncertainty is statistical and the second is systematic.

Original language	English
Article number	030
Number of pages	29
Journal	Journal of High Energy Physics
Issue number	10
DOIs	https://doi.org/10.1007/JHEP10(2016)030
Publication status	Published - 7-Oct-2016

Keywords

Electroweak interaction
Hadron-Hadron scattering (experiments)
QCD
PARTON DISTRIBUTIONS
HADRON COLLIDERS
LHC

Access to Document

10.1007/JHEP10(2016)030Licence: CC BY

art%3A10.1007%2FJHEP10%282016%29030Final publisher's version, 771 KBLicence: CC BY

Handle.net

Persistent link

Cite this

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., ... LHCb Collaboration (2016). Measurement of forward W -> e nu production in pp collisions at root s=8 TeV. Journal of High Energy Physics, (10), Article 030. https://doi.org/10.1007/JHEP10(2016)030

@article{75d0ee4f2cf4429a979f93cc8cedc444,

title = "Measurement of forward W -> e nu production in pp collisions at root s=8 TeV",

abstract = "A measurement of the cross-section for W -> e nu production in pp collisions is presented using data corresponding to an integrated luminosity of 2 fb(-1) collected by the LHCb experiment at a centre-of-mass energy of root s = 8 TeV. The electrons are required to have more than 20 GeV of transverse momentum and to lie between 2.00 and 4.25 in pseudorapidity. The inclusive W production cross-sections, where the W decays to e nu, are measured to beW-sigma(+)-> e(+)nu(e)= 1124.4 +/- 2.1 +/- 21.5 +/- 11.2 +/- 13.0 pb, W-sigma(-)-> e(-)(nu) over bar (e) = 809.0 +/- 1.9 +/- 18.1 +/- 7.0 +/- 9.4 pb,where the first uncertainties are statistical, the second are systematic, the third are due to the knowledge of the LHC beam energy and the fourth are due to the luminosity determination.Differential cross-sections as a function of the electron pseudorapidity are measured. The W+/W- cross-section ratio and production charge asymmetry are also reported. Results are compared with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. Finally, in a precise test of lepton universality, the ratio of W boson branching fractions is determined to beB(W -> e nu)/B(W -> mu nu) = 1.020 +/- 0.002 +/- 0.019,where the first uncertainty is statistical and the second is systematic.",

keywords = "Electroweak interaction, Hadron-Hadron scattering (experiments), QCD, PARTON DISTRIBUTIONS, HADRON COLLIDERS, LHC",

author = "R. Aaij and B. Adeva and M. Adinolfi 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 G. Andreassi and M. Andreotti and Andrews, \{J. E.\} and Appleby, \{R. B.\} and Gutierrez, \{O. Aquines\} and F. Archilli and P. d'Argent and Romeu, \{J. Arnau\} and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and I. Babuschkin 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 B. Batsukh and V. Battista and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and Onderwater, \{C. J. G.\} and A. Pellegrino and S. Tolk and \{LHCb Collaboration\}",

year = "2016",

month = oct,

day = "7",

doi = "10.1007/JHEP10(2016)030",

language = "English",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer",

number = "10",

}

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Cartelle, PA, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Gutierrez, OA, Archilli, F, d'Argent, P, Romeu, JA, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Batsukh, B, Battista, V, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Onderwater, CJG, Pellegrino, A, Tolk, S & LHCb Collaboration 2016, 'Measurement of forward W -> e nu production in pp collisions at root s=8 TeV', Journal of High Energy Physics, no. 10, 030. https://doi.org/10.1007/JHEP10(2016)030

TY - JOUR

T1 - Measurement of forward W -> e nu production in pp collisions at root s=8 TeV

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

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 - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Gutierrez, O. Aquines

AU - Archilli, F.

AU - d'Argent, P.

AU - Romeu, J. Arnau

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Babuschkin, I.

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 - Batsukh, B.

AU - Battista, V.

AU - Beaucourt, L.

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Onderwater, C. J. G.

AU - Pellegrino, A.

AU - Tolk, S.

AU - LHCb Collaboration

PY - 2016/10/7

Y1 - 2016/10/7

N2 - A measurement of the cross-section for W -> e nu production in pp collisions is presented using data corresponding to an integrated luminosity of 2 fb(-1) collected by the LHCb experiment at a centre-of-mass energy of root s = 8 TeV. The electrons are required to have more than 20 GeV of transverse momentum and to lie between 2.00 and 4.25 in pseudorapidity. The inclusive W production cross-sections, where the W decays to e nu, are measured to beW-sigma(+)-> e(+)nu(e)= 1124.4 +/- 2.1 +/- 21.5 +/- 11.2 +/- 13.0 pb, W-sigma(-)-> e(-)(nu) over bar (e) = 809.0 +/- 1.9 +/- 18.1 +/- 7.0 +/- 9.4 pb,where the first uncertainties are statistical, the second are systematic, the third are due to the knowledge of the LHC beam energy and the fourth are due to the luminosity determination.Differential cross-sections as a function of the electron pseudorapidity are measured. The W+/W- cross-section ratio and production charge asymmetry are also reported. Results are compared with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. Finally, in a precise test of lepton universality, the ratio of W boson branching fractions is determined to beB(W -> e nu)/B(W -> mu nu) = 1.020 +/- 0.002 +/- 0.019,where the first uncertainty is statistical and the second is systematic.

AB - A measurement of the cross-section for W -> e nu production in pp collisions is presented using data corresponding to an integrated luminosity of 2 fb(-1) collected by the LHCb experiment at a centre-of-mass energy of root s = 8 TeV. The electrons are required to have more than 20 GeV of transverse momentum and to lie between 2.00 and 4.25 in pseudorapidity. The inclusive W production cross-sections, where the W decays to e nu, are measured to beW-sigma(+)-> e(+)nu(e)= 1124.4 +/- 2.1 +/- 21.5 +/- 11.2 +/- 13.0 pb, W-sigma(-)-> e(-)(nu) over bar (e) = 809.0 +/- 1.9 +/- 18.1 +/- 7.0 +/- 9.4 pb,where the first uncertainties are statistical, the second are systematic, the third are due to the knowledge of the LHC beam energy and the fourth are due to the luminosity determination.Differential cross-sections as a function of the electron pseudorapidity are measured. The W+/W- cross-section ratio and production charge asymmetry are also reported. Results are compared with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. Finally, in a precise test of lepton universality, the ratio of W boson branching fractions is determined to beB(W -> e nu)/B(W -> mu nu) = 1.020 +/- 0.002 +/- 0.019,where the first uncertainty is statistical and the second is systematic.

KW - Electroweak interaction

KW - Hadron-Hadron scattering (experiments)

KW - QCD

KW - PARTON DISTRIBUTIONS

KW - HADRON COLLIDERS

KW - LHC

U2 - 10.1007/JHEP10(2016)030

DO - 10.1007/JHEP10(2016)030

M3 - Article

SN - 1029-8479

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 10

M1 - 030

ER -

Measurement of forward W -> e nu production in pp collisions at root s=8 TeV

Abstract

Keywords

Access to Document

Handle.net

Fingerprint

Cite this