Publications
1227 results found
Egede U, Hadavizadeh T, Singla M, et al., 2022, The role of multi-parton interactions in doubly-heavy hadron production, EUROPEAN PHYSICAL JOURNAL C, Vol: 82, ISSN: 1434-6044
Aaij R, Abdelmotteleb ASW, Abellán Beteta C, et al., 2022, First Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow><mml:mi>μ</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>μ</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> Angular Coefficients in the Forward Region of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math> Collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:mrow></mml:math>, Physical Review Letters, Vol: 129, ISSN: 0031-9007
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, First Measurement of the Z -> mu(+) mu(-) Angular Coefficients in the Forward Region of pp Collisions at root s=13 TeV, PHYSICAL REVIEW LETTERS, Vol: 129, ISSN: 0031-9007
Aaij R, Beteta CA, Ackernley T, et al., 2022, Study of coherent J/psi production in lead-lead collisions at root S-NN=5 TeV, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 2
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Constraints on the CKM angle gamma from B-+/- -> Dh(+/-) decays using D -> h(+/-)h '(-/+)pi(0) final states, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Precision measurement of forward Z boson production in proton-proton collisions at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 1
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Observation of an exotic narrow doubly charmed tetraquark, NATURE PHYSICS, Vol: 18, Pages: 751-+, ISSN: 1745-2473
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- Citations: 25
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Study of the doubly charmed tetraquark T-cc(+), NATURE COMMUNICATIONS, Vol: 13
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- Citations: 33
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Angular Analysis of D0 -> x plus x-mu plus mu- and D0 -> K plus K-mu plus mu- Decays and Search for CP Violation, PHYSICAL REVIEW LETTERS, Vol: 128, ISSN: 0031-9007
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- Citations: 1
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Measurement of the charm mixing parameter y(CP)-y(CP)(K pi) using two-body D-0 meson decays, PHYSICAL REVIEW D, Vol: 105, ISSN: 2470-0010
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Observation of the Decay Lambda(0)(b) -> Lambda(+)(c) tau(-)(nu)over-bar(tau), PHYSICAL REVIEW LETTERS, Vol: 128, ISSN: 0031-9007
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- Citations: 5
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Observation of the Decay Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ¯]_{τ}., Phys Rev Lett, Vol: 128
The first observation of the semileptonic b-baryon decay Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ¯]_{τ}, with a significance of 6.1σ, is reported using a data sample corresponding to 3 fb^{-1} of integrated luminosity, collected by the LHCb experiment at center-of-mass energies of 7 and 8 TeV at the LHC. The τ^{-} lepton is reconstructed in the hadronic decay to three charged pions. The ratio K=B(Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ¯]_{τ})/B(Λ_{b}^{0}→Λ_{c}^{+}π^{-}π^{+}π^{-}) is measured to be 2.46±0.27±0.40, where the first uncertainty is statistical and the second systematic. The branching fraction B(Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ¯]_{τ})=(1.50±0.16±0.25±0.23)% is obtained, where the third uncertainty is from the external branching fraction of the normalization channel Λ_{b}^{0}→Λ_{c}^{+}π^{-}π^{+}π^{-}. The ratio of semileptonic branching fractions R(Λ_{c}^{+})≡B(Λ_{b}^{0}→Λ_{c}^{+}τ^{-}ν[over ¯]_{τ})/B(Λ_{b}^{0}→Λ_{c}^{+}μ^{-}ν[over ¯]_{μ}) is derived to be 0.242±0.026±0.040±0.059, where the external branching fraction uncertainty from the channel Λ_{b}^{0}→Λ_{c}^{+}μ^{-}ν[over ¯]_{μ} contributes to the last term. This result is in agreement with the standard model prediction.
Aaij R, Abdelmotteleb ASW, Abellan Beteta C, et al., 2022, Search for the decay B-0 -> phi mu(+) mu(-), JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Tests of Lepton Universality Using B-0 -> K(S)(0)l(+) l(-) and B+ -> K*(+)l(+)l(-) Decays, PHYSICAL REVIEW LETTERS, Vol: 128, ISSN: 0031-9007
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- Citations: 15
Aaij R, Abdelmotteleb ASW, Abellan Beteta C, et al., 2022, Observation of the doubly charmed baryon decay Xi(++)(cc) -> Xi(c)'(+)pi(+), JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 4
Abudinén F, Blake T, Egede U, et al., 2022, Prospects for studies of D<sup>∗ 0</sup>→ μ<sup>+</sup>μ<sup>-</sup> and B(s)∗0→<sup>μ+</sup><sup>μ-</sup> decays, European Physical Journal C, Vol: 82, ISSN: 1434-6044
Weak decays of the vector D∗0 and B(s)∗0 mesons to the μ+μ- final state provide novel potential to test the Standard Model of particle physics. Such processes have extremely small branching fractions as the vector mesons are able to decay through electromagnetic and (for the D∗0 meson) strong interactions. Nonetheless, the production of copious quantities of these particles in LHC collisions, and the ability to exploit experimental techniques that can suppress background to low levels, provides good potential to reach interesting sensitivity. The possibility to reconstruct these processes as part of the decay chain of B- or Bc+ mesons appears particularly attractive due to the clean experimental signature of the displaced vertex. Indeed, published LHCb data on B-→ π-μ+μ- decays already implies a stringent limit on the branching fraction of D∗ 0→ μ+μ-. Estimates are made on the achievable sensitivity to D∗ 0→ μ+μ- and B(s)∗0→μ+μ- decays with the LHCb experiment.
Aaij R, Ackernley T, Adeva B, et al., 2022, Centrality determination in heavy-ion collisions with the LHCb detector, JOURNAL OF INSTRUMENTATION, Vol: 17, ISSN: 1748-0221
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Search for massive long-lived particles decaying semileptonically at root s=13 TeV, EUROPEAN PHYSICAL JOURNAL C, Vol: 82, ISSN: 1434-6044
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Observation of Two New Excited ?(0)(b) States Decaying to ?K-0(b) -?(+), PHYSICAL REVIEW LETTERS, Vol: 128, ISSN: 0031-9007
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- Citations: 3
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Observation of the B-0 -> (D)over-bar*K-0(+) pi(-) and B-s(0) -> (D)over-bar*K-0(-)pi(+) decays, PHYSICAL REVIEW D, Vol: 105, ISSN: 2470-0010
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Study of charmonium and charmonium-like contributions in B+ -> J/psi eta K+ decays, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 1
Aaij R, Beteta CA, Ackernley T, et al., 2022, Measurement of the Nuclear Modification Factor and Prompt Charged Particle Production in p-Pb and pp Collisions at root s(NN )=5 TeV, PHYSICAL REVIEW LETTERS, Vol: 128, ISSN: 0031-9007
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- Citations: 2
Aaij R, Abdelmotteleb ASW, Abellán Beteta C, et al., 2022, Observation of the B0 → D ¯ ∗0K+π- and Bs0 → D ¯ ∗0K-π+ decays, Physical Review D, Vol: 105, ISSN: 2470-0010
The first observations of B0→D¯∗(2007)0K+π- and Bs0→D¯∗(2007)0K-π+ decays are presented, and their branching fractions relative to that of the B0→D¯∗(2007)0π+π- decay are reported. These modes can potentially be used to investigate the spectroscopy of charm and charm-strange resonances and to determine the angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle. It is also important to understand them as a source of potential background in determinations of γ from B+→DK+ and B0→DK+π- decays. The analysis is based on a sample corresponding to an integrated luminosity of 5.4 fb-1 of proton-proton collision data at 13 TeV center-of-mass energy recorded with the LHCb detector. The D¯∗(2007)0 mesons are fully reconstructed in the D¯0π0 and D¯0γ channels with the D¯0→K+π- decay. A novel weighting method is used to subtract background while simultaneously applying an event-by-event efficiency correction to account for resonant structures in the decays.
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Measurement of the photon polarization in Lambda(0)(b) -> Lambda gamma decays, PHYSICAL REVIEW D, Vol: 105, ISSN: 2470-0010
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- Citations: 2
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Observation of Lambda(0)(b) -> D(+)p pi(-)pi(-) and Lambda(0)(b) -> D-*+p pi(-)pi(-) decays, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
Aaij R, Abdelmotteleb ASW, Abellán Beteta C, et al., 2022, Measurement of the photon polarization in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>b</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>γ</mml:mi></mml:math> decays, Physical Review D, Vol: 105, ISSN: 2470-0010
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Searches for rare B-s(0) and B-0 decays into four muons, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 1
Aaij R, Abdelmotteleb ASW, Beteta CA, et al., 2022, Measurement of the lifetimes of promptly produced Omega(0)(c) and Xi(9)(c) baryons, SCIENCE BULLETIN, Vol: 67, Pages: 479-487, ISSN: 2095-9273
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- Citations: 4
Aaij R, Beteta CA, Ackernley T, et al., 2022, J/psi photoproduction in Pb-Pb peripheral collisions at root S-NN=5 TeV, PHYSICAL REVIEW C, Vol: 105, ISSN: 2469-9985
Aaij R, Beteta CA, Ackernley T, et al., 2022, Test of lepton universality in beauty-quark decays, NATURE PHYSICS, Vol: 18, Pages: 277-+, ISSN: 1745-2473
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- Citations: 47
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