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SUMMARY:First measurement of the relative production of $B_s^0$ and $B^+$ 
 mesons $f_s/f_u$ in $pp$ collisions at $\\sqrt s = 13.6 ~ \\mathrm{TeV}$
DTSTART:20260911T130000Z
DTEND:20260911T140000Z
DTSTAMP:20260906T201300Z
UID:indico-event-4962@indico.e5.physik.tu-dortmund.de
CONTACT:mick.mulder@tu-dortmund.de\;lukas.witola@tu-dortmund.de
DESCRIPTION:Speakers: Daniele Provenzano (Università degli Studi di Cagli
 ari\, INFN Cagliari)\n\nA new measurement of the ratio of the $B_s^0$ and 
 $B^+$ fragmentation fractions\, $f_s$/$f_u$\, will be presented. The measu
 rement is performed with $B_s^0 \\to J/\\psi \\phi$ and $B^+ \\to J/\\psi 
 K^+$ decays in $pp$ collisions for the first time at a centre-of-mass ener
 gy of $\\sqrt s = 13.6~\\mathrm{TeV}$\, using LHCb Run 3 data collected wi
 th the all-new LHCb Upgrade detector in 2024. The dependence of this obser
 vable on $B$-meson kinematic variables is also discussed\, confirming the 
 dependence on transverse momentum. Finally\, the combination of this measu
 rement with previous LHCb results at different centre-of-mass energies wil
 l be shown.\n\nhttps://indico.e5.physik.tu-dortmund.de/event/4962/
LOCATION:CP-03-123 - E5a Seminarraum (TUDortmund)
URL:https://indico.e5.physik.tu-dortmund.de/event/4962/
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