Some Fun Papers

A collection of papers I find interesting and want to keep handy for future reference, with some notes quickly taken.

Last updated: May 4, 2026

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Calorimetry Generic Detector R&D Polarization

Calorimetry

• Dual-Readout Calorimetry (2018)
  
  Sehwook Lee, Michele Livan, Richard Wigmans
  Published in: Rev. Mod. Phys. 90 (2018) 025002
  Notes:

  • Review of DR Calorimeter
  • see also the DREAM/RD52 publication list.
  • For a visual demonstration of how rays travel, see Interactive Ray Propagation.
• Experimental Tests of Particle Flow Calorimetry (2016)
  
  Felix Sefkow, Andy White, Kiyotomo Kawagoe, Roman Pöschl, José Repond
  Published in: Rev. Mod. Phys. 88 (2016) 015003
  Notes:

  Review of PF Calorimeter

• Measurement of pion and proton response and longitudinal shower profiles up to 20 nuclear interaction lengths with the ATLAS tile calorimeter (2010)
  
  P. Adragna et al.
  Published in: Nucl. Instrum. Meth. A 615 (2010) 158-181
  Notes:

  Pion vs proton showers in ATLAS Tile Calorimeter:

  • larger $f_{EM}$, higher response in pion showers (pion first interaction can produce $\pi^0$)
  • larger $\lambda_{I}$ for pions compared with protons
  • deeper in pion showers compared with protons
  • narrower in pion showers compared with protons
  • larger event-by-event fluctuation in pion showers
• The KLOE electromagnetic calorimeter (2002)
  
  M. Adinolfi et al.
  Published in: Nucl. Instrum. Meth. A 494 (2002) 326-331
  Notes:

  • “Dual” readout: measure time on both sides of fiber ($t_{A,B}$); use average of $t_{A,B}$ as timing measurement, and $v*(t_A - t_B)$ as longitudinal position
  • Excellent timing performance: $54 ps / \sqrt{E(GeV)} \oplus 50 ps$
  • $K_L$ vertex reconstruction and lifetime measurements using track, energy, and timing information
• Measurement of the time development of particle showers in a uranium scintillator calorimeter (1993)
  
  A. Caldwell, L. Hervas, J. A. Parsons, F. Sciulli, W. Sippach, L. Wai
  Published in: Nucl. Instrum. Meth. A 330 (1993) 389-404
  Notes:

  Measurement of EM and hadron shower time profile in a compensation calorimeter

• Lateral shower profiles in a lead / scintillating fiber calorimeter (1992)
  
  D. Acosta et al.
  Published in: Nucl. Instrum. Meth. A 316 (1992) 184-201
  Notes:

  SPACAL prototype:

  • Comparing lateral shower profile of electrons vs pions
  • Neutron contributions in the larger radius part
• Electron, pion and multiparticle detection with a lead / scintillating - fiber calorimeter (1991)
  
  D. Acosta et al.
  Published in: Nucl. Instrum. Meth. A 308 (1991) 481-508
  Notes:

  SPACAL prototype:

  • Resolutions of EM and hadron showers in lead + scinillation “spaghetti” calorimeter
  • Corrections for various effects: attenuation, preshower detector, etc
  • e/h, asymmetric energy distribution in pion showers

Generic Detector R&D

• Why (and How) LGADs Work: Ionization, Space Charge, and Gain Saturation (2026)
  
  N. Cartiglia et al.
  Published in: arXiv:2603.10841 [hep-ex]
  Notes:

  • MIP deposits charge non-uniformly along the track
  • Coulomb replusion between clusters make high (low) charge-density clusters experience stronger (weaker) repulsive force. smearing out the initial non-uniformity
  • Large deposits are amplified less because of gain saturation (high density lowers the bias field), regularizing the signal
• A brief history of Timing (2026)
  
  N. Cartiglia
  Published in: TIPP 2026
  Notes:

  Review of usage of timing information in HEP experiments: various technologies, (sub)detectors, and experiments

Polarization

• Electroweak Symmetry Restoration and Radiation Amplitude Zeros (2025)
  
  Rodolfo Capdevilla, Tao Han
  Published in: Phys. Rev. Lett. 135 (2025) 101801
  Notes:

  EW symmetry restoration (EWSR) at higher energies, where $W_{T}/Z_{T}\rightarrow\gamma$, $W_{L}/Z_{L}\rightarrow H$

• Studies of the Energy Dependence of Diboson Polarization Fractions and the Radiation-Amplitude-Zero Effect in WZ Production with the ATLAS Detector (2024)
  
  ATLAS Collaboration
  Published in: Phys. Rev. Lett. 133 (2024) 101802
  Notes:

  • Erratum: Phys.Rev.Lett. 133 (2024) 169901
  • RAZ dip in $W_{T}Z_{T}$