2026-03-27
13:23 |
Measurements of transverse-momentum dependent effects in semi-inclusive DIS at Compass
/ Matousek, Jan (Charles U., Prague (main))
/COMPASS Collaboration
COMPASS experiment at CERN had a wide physics programme.Its cornerstone were studies of hadron production in deep inelastic scattering (DIS), which can be interpreted in the transverse-momentum-dependent (TMD) factorisation framework, allowing to access the distributions of polarisation and transverse momentum of quarks within the nucleon in the language of TMD PDFs, and the hadronisation in terms of TMD fragmentation functions.The data collected with a liquid hydrogen target in 2016-2017 will soon bring new information on the transverse momentum and may allow for the first time to extract the transverse polarisation of quarks within an unpolarised nucleon described by the Boer-Mulders function.The unique data collected with a transversely polarised deuteron target have already improved the knowledge of the d-quark transversity (transverse counterpart of the helicity PDF), reducing the uncertainties by a factor of 2.5 at large Bjorken x, and are yet to yield a number of interesting results..
2026 - 6 p.
- Published in : PoS EPS-HEP2025 (2026) 259
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In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025, pp.259
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2026-03-27
13:23 |
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2026-03-27
06:07 |
Ground-State Extraction of Heavy-Light Meson Semileptonic Decay Form Factors
/ D'Anna, A. (Madrid, IFT ; Madrid, Autonoma U.) ; Conigli, A. (Mainz U. ; Darmstadt, GSI) ; Fritzsch, P. (Trinity Coll., Dublin) ; Gérardin, A. (Marseille, CPT) ; Heitger, J. (Munster U., ITP) ; Herdoíza, G. (Madrid, IFT ; Madrid, Autonoma U.) ; Husung, N. (Madrid, IFT ; Madrid, Autonoma U. ; CERN) ; Kuberski, S. (CERN) ; Pena, C. (Madrid, IFT ; Madrid, Autonoma U.) ; Simma, H. (NIC, Zeuthen)
We discuss the extraction of heavy-light pseudo-scalar to light pseudo-scalar decay form factors from finite time correlation functions. We place particular emphasis on the contamination from excited states employing summed ratios and input from chiral perturbation theory. [...]
arXiv:2603.24491; CERN-TH-2026-057; IFT-UAM/CSIC-26-37; MS-TP-26-10.-
2026-03-25 - 11 p.
- Published in : PoS: LATTICE2025 (2026) , pp. 246
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In : 42th International Symposium on Lattice Field Theory (Lattice 2025), Mumbai, India, 2 - 8 Nov 2025, pp.246
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2026-03-26
10:14 |
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2026-03-26
10:14 |
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2026-03-26
10:14 |
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2026-03-26
10:14 |
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
10:14 |
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2026-03-26
10:14 |
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
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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
10:14 |
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