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2024-09-11
16:37
Upsilon mass peaks in 2024 data /LHCb Collaboration
This document shows the dimuon invariant mass spectrum in $\Upsilon(1S), \Upsilon(2S), \Upsilon(3S)$ signal region, using LHCb $pp$ interaction dataset collected in 2024 with the latest alignment being implemented. The $\Upsilon(1S)$ peak is well separated from the other two $\Upsilon$ states, and the overlap between $\Upsilon(2S), \Upsilon(3S)$ peaks is also small, which indicates a good momentum resolution..
LHCB-FIGURE-2024-025.- Geneva : CERN, 2024 - 4. Fulltext: main - PDF; LHCb-FIGURE-2024-025 - ZIP;

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2024-09-11
14:23
$\psi(2S)$ invariant mass and pseudolifetime 2D fit using 2024 data /LHCb Collaboration
This document presents the two dimensional fit result of the dimuon invariant mass spectrum and pseudo-lifetime of $\psi(2S)\to\mu^+\mu^-$ samples collected by the LHCb experiment in 2024, in $pp$ interactions with a center-of-mass energy of 13.6 $\text{TeV}$. The two dimensional fit will enable the extraction of signal yields of $\psi(2S)$ particles either originating from prompt production or from b-hadron decays [...]
LHCB-FIGURE-2024-024.- Geneva : CERN, 2024 - 5. Fulltext: LHCb-FIGURE-2024-024 - ZIP; main-1 - PDF;

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2024-09-11
13:56
Charm results in SMOG2 2024 data /LHCb Collaboration
The invariant mass spectrum of several charm mesons is reported, using data of proton-hydrogen ($p\mathrm{H}_{2}$) and proton-argon ($p\mathrm{Ar}$) collisions at $\sqrt{s_{NN}}=113\ \text{GeV}$ collected by LHCb in its fixed-target configuration in 2024. The $p\mathrm{H}_2$ dataset corresponds to 39 hours of hydrogen gas injection in the SMOG2 system, while the pAr dataset was collected during 88 hours of Argon injection. [...]
LHCB-FIGURE-2024-023.- Geneva : CERN, 2024 - 4. Fulltext: main - PDF; LHCb-FIGURE-2024-023 - ZIP;

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2024-09-11
11:58
Rare electroweak penguin decays in 2024 data /LHCb Collaboration
The first mass fits to rare ${B^+\to K^+\mu^+\mu^-}$ and ${B^0\to K^{*0}\mu^+\mu^-}$ decays, selected from the 2024 LHCb dataset, are presented. These results show qualitative agreement with the mass shape and purity observed in the data collected between 2011 and 2018 by the LHCb experiment [...]
LHCB-FIGURE-2024-022.- Geneva : CERN, 2024 - 12. Fulltext: LHCb-FIGURE-2024-022 - ZIP; main-3 - PDF;

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2024-09-11
11:03
Invariant-mass distribution of $D^-\pi^+$ candidates in 2024 data /LHCb Collaboration
Invariant-mass distribution of $D^-\pi^+$ candidates in 2024 data..
LHCB-FIGURE-2024-021.- Geneva : CERN, 2024 - 3. Fulltext: LHCb-FIGURE-2024-021 - ZIP; main-2 - PDF;

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2024-09-11
09:42
Invariant mass of $Z \to \mu^{+}\mu^{-}$ in 2024 data /LHCb Collaboration
In this figure document the $Z \to \mu^{+}\mu^{-}$ invariant mass peak in a small subset of the 2024 LHCb data is presented. On top of the most recent improvements to the online alignment, the data has been corrected with an unoptimised set of pseudomass corrections derived from the data, which improves the mass resolution by 10%. [...]
LHCB-FIGURE-2024-020.- Geneva : CERN, 2024 - 3. Fulltext: LHCb-FIGURE-2024-020 - ZIP; main - PDF;

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2024-07-17
10:12
Calibration of online luminosity measurement using VELO RetinaCluster counters at LHCb /LHCb Collaboration
Preliminary results of the calibration of the VELO RetinaCluster luminosity counters are presented. The calibration is performed using the online counters data, provided by the VELO TELL40 boards to the experimental control system (ECS), and the beam parameters provided by the LHC..
LHCB-FIGURE-2024-019.- Geneva : CERN, 2024 - 7. Fulltext: LHCb-FIGURE-2024-019 - ZIP; FIGURE-2024-019 - PDF;

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2024-07-17
10:08
BuSca: a Buffer Scanner at HLT1 to detect LLPs beyond the SM /LHCb Collaboration
A prototype algorithm for searches at the HLT1 level making use of the high degree of parallelisation in the new LHCb trigger scheme on GPUs is being developed. It is based on the reconstruction of downstream tracks, making candidates which are projected in 2D histograms of flight distance and mass hypotheses at 30 MHz. [...]
LHCB-FIGURE-2024-018.- Geneva : CERN, 2024 - 5. Fulltext: LHCb-FIGURE-2024-018 - ZIP; FIGURE-2024-018 - PDF;

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2024-07-17
09:50
Calorimeter performance $-\pi^0$ mass and $B^0$ mass from $B0\rightarrow K^{\ast}\gamma$ decay /LHCb Collaboration
$\pi^0$ mass reconstruction and $B^0$ mass reconstruction from the $K^{\ast}\gamma$ selection using 2024 data. The plots have been made from the 2024 data sample (Run 3) processed after the first ECAL calibration..
LHCB-FIGURE-2024-017.- Geneva : CERN, 2024 - 4. Fulltext: FIGURE_2024_017 - PDF; LHCb-FIGURE-2024-017 - ZIP;

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2024-07-17
09:27
SciFi Performance plots July 2024 /LHCb collaboration
Data plots as seen in the current monitoring, or extracted from. The average SiPM efficiency per layer, occupancy, and number of clusters are shown for Fill 9877..
LHCB-FIGURE-2024-016.- Geneva : CERN, 16 - 5. Fulltext: Figure-2024-016 - PDF; LHCb-FIGURE-2024-016 - ZIP;

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