2026-03-26
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2026-03-26
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2026-03-26
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2026-03-26
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Low-x physics at LHCb
/ Meyer Garcia, Lucas (Maryland U., College Park)
/LHCb Collaboration
The LHCb detector, with its unique forward geometry, provides unprecedented kinematic coverage at low Bjorken-$x$ values, down to $10^{-6}$.LHCb’s excellent momentum resolution, vertex reconstruction and particle identification allow precision measurements down to very low hadron transverse momentum.In this report, recent studies of exclusive vector boson production in proton-proton and heavy ion collisions will be presented.These studies include the central exclusive production (CEP) of charmonium vector mesons in $pp$ collisions, as well as their production in ultra-peripheral Lead-Lead collisions (UPC).Additionally, the production of exotic meson candidates in diffractive proton-proton collisions, previously observed only in $B^+ \to J/\psi\phi K^+$ decays, is reported.Future prospects for further investigations into low-$x$ phenomena with the LHCb detector in Run 3 are also explored..
2026 - 10 p.
- Published in : PoS EPS-HEP2025 (2026) 228
Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025, pp.228
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2026-03-26
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2026-03-26
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The LHCb PicoCal
/ Yuan, Zhiyang (Peking U., Beijing) ; Zhang, Chenjia (Peking U., Beijing)
/LHCb ECAL Upgrade II R&D; Group, Collaboration
The High-Luminosity LHC era will enable the LHCb experiment to record an unprecedented dataset of up to $300 \mathrm{~fb}^{-1}$, operating at instantaneous luminosities approaching $1.5 \times 10^{34} \mathrm{~cm}^{-2} \mathrm{~s}^{-1}$. Under such conditions, the electromagnetic calorimeter (ECAL) must withstand MGy-level radiation in its central region, cope with significantly higher occupancy, and maintain excellent energy and time resolution performance. [...]
2026 - 7 p.
- Published in : PoS EPS-HEP2025 (2026) 520
Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025, pp.520
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2026-03-26
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2026-03-26
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2026-03-26
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The commissioning and operational experience of LHCb - Upstream Tracker
/ Krupa, Wojciech
/LHCb Upstream Tracker Group, Collaboration
The LHCb detector has undergone a substantial upgrade, allowing the experiment to collect data with an all-software trigger, enabled by real-time front-end readout and rapid, efficient online reconstruction. The Upstream Tracker (UT), a four-plane silicon microstrip detector situated in front of the dipole magnet, is vital for reconstructing the paths of charged particles. [...]
2026 - 5 p.
- Published in : PoS EPS-HEP2025 (2026) 539
Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025, pp.539
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2026-03-26
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Probing for New Physics with b→sℓ+ℓ−b→sℓ+ℓ− Transitions at LHCb
/ Carus, Leon David (U. Heidelberg (main))
/LHCb Collaboration
The analysis of $b\to s\ell^+\ell^-$ flavor-changing neutral currents (FCNC) is a powerful test of the Standard Model (SM).As these decay modes are highly suppressed in the SM, potential New Physics (NP) contributions can have a significant impact on measured observables. In recent years, experimental measurements of different observables in this sector displayed intriguing tensions with SM theory predictions and sparked a collective effort to investigate their potential origin from the experimental and theoretical sides.Measurements of branching fractions and angular observables from $B^{+}\to K^{+}\ell^+\ell^-$, $B^{0}\to K^{*0}\ell^+\ell^-$, $B^{+}\to K^{*+}\ell^+\ell^-$ and $B_s^0\to \phi(1020)\ell^+\ell^-$ decays conducted by the LHCb collaboration consistently indicate a shift of the Wilson Coefficient (WC) $\mathcal{R}e(C_9)$ of approximately $\Delta\mathcal{R}e(C_9)\approx-1$.Tests of lepton flavor universality (LFU), on the other hand, found branching fraction ratios of $b\to s e^+e^-$ and $b\to s \mu^+\mu^-$ decay modes to be consistent with the LFU hypothesis.These proceedings present the latest results of angular analyses of the decay modes $B^{0}\to K^{*0}e^+e^-$ and $B_s\to \phi(1020)e^+e^-$, as well as the analysis of local and nonlocal amplitudes in the $B^{0}\to K^{*0}\mu^+\mu^-$ decay mode using the Run~1 and Run~2 LHCb data samples..
2026 - 6 p.
- Published in : PoS EPS-HEP2025 (2026) 344
Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025, pp.344
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