R. Jacobsson

First Measurement of the Z→μ+μ− Angular Coefficients in the Forward Region of pp Collisions at s=13 TeV

R. Aaij, A. S. W. Abdelmotteleb, C. Abellán Beteta, F. Abudinén et autres

The first study of the angular distribution of ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ pairs produced in the forward rapidity region via the Drell-Yan reaction $pp\ensuremath{\rightarrow}{\ensuremath{\gamma}}^{*}/Z+X\ensuremath{\rightarrow}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}+X$ is presented, using data collected with the LHCb detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity …

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Angular Analysis of D0→π+π−μ+μ− and D0→K+K−μ+μ− Decays and Search for CP Violation

R. Aaij, A. S. W. Abdelmotteleb, C. Abellán Beteta, F. Abudinén et autres

The first full angular analysis and an updated measurement of the decay-rate $CP$ asymmetry of the ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ and ${D}^{0}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decays are reported. The analysis uses proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. …

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Measurement of the Bs0→μ+μ− decay properties and search for the B0→μ+μ− and Bs0→μ+μ−γ decays

R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres

An improved measurement of the decay B 0 s → µ + µ -and searches for the decays B 0 → µ + µ -and B 0 s → µ + µ -γ are performed at the LHCb experiment using data collected …

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Analysis of Neutral B -Meson Decays into Two Muons

R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres

Branching fraction and effective lifetime measurements of the rare decay B0s→μ+μ− and searches for the decays B0→μ+μ− and B0s→μ+μ−γ are reported using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a …

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Precise determination of the $$B_{\mathrm{s}}^0$$–$$\overline B_{\mathrm{s}}^0$$ oscillation frequency

R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres

Abstract Mesons comprising a beauty quark and strange quark can oscillate between particle ( $${B}_{\mathrm{s}}^{0}$$ B s 0 ) and antiparticle ( $${\overline{B}}_{\mathrm{s}}^{0}$$ B ¯ s 0 ) flavour eigenstates, with a frequency given by the mass difference between heavy and light …

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Observation of the suppressed Λb0→DpK− decay with D→K+π− and measurement of its CP asymmetry

R. Aaij, A. S. W. Abdelmotteleb, Carlos Abellán Beteta, F. J. Abudinen Gallego et autres

A study of ${\mathrm{\ensuremath{\Lambda}}}_{b}^{0}$ baryon decays to the $Dp{K}^{\ensuremath{-}}$ final state is presented based on a proton-proton collision data sample corresponding to an integrated luminosity of $9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with the LHCb detector. Two ${\mathrm{\ensuremath{\Lambda}}}_{b}^{0}$ decays are considered, ${\mathrm{\ensuremath{\Lambda}}}_{b}^{0}\ensuremath{\rightarrow}Dp{K}^{\ensuremath{-}}$ with $D\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ …

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Amplitude analysis of the B+→D+D−K+ decay

R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres

In an amplitude analysis of the ${B}^{+}\ensuremath{\rightarrow}{D}^{+}\phantom{\rule{0}{0ex}}{D}^{\ensuremath{-}}\phantom{\rule{0}{0ex}}{K}^{+}$ decay, the LHCb Collaboration finds evidence for new spin-0 and spin-1 exotic open-charm and open_strangeness resonances in the ${D}^{\ensuremath{-}}\phantom{\rule{0}{0ex}}{K}^{+}$ channel with masses around 2.9 GeV. These resonances must contain at least four quarks, namely an …

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First observation of the decay B0→D0D¯K+0π−

R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres

The first observation of the decay ${B}^{0}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ is reported using proton-proton collision data corresponding to an integrated luminosity of $4.7\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the LHCb experiment in 2011, 2012 and 2016. The measurement is performed in the full kinematically allowed range …

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A measurement of the CP asymmetry difference between Λ c + → pK–K+ and pπ–π+ decays

R. Aaij, B. Adeva, G. Alkhazov, J. Buytaert et autres

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Addendum: Observation of double charm production involving open charm in pp collisions at $ \sqrt{s} $ = 7 TeV

R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi et autres

The production of J/ψ mesons accompanied by open charm hadrons, and of pairs of open charm hadrons in pp collisions at a centre-of-mass energy of 7 TeV has been reported in ref. [1].For all measured production cross-sections the inclusion of charge conjugate …

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