Searches for long-lived particles at the LHC: Second workshop of the LHC LLP Community

Europe/Zurich
Giambiagi Lecture Hall (ICTP, Trieste, Italy)

Giambiagi Lecture Hall

ICTP, Trieste, Italy

Albert De Roeck (CERN), Bobby Samir Acharya (Abdus Salam Int. Cent. Theor. Phys. (IT)), Brian Shuve (SLAC National Accelerator Laboratory), James Beacham (Ohio State University (US)), Xabier Cid Vidal (Universidade de Santiago de Compostela)
Description

- - - - - See below for a special pre-workshop lecture by Steven Weinberg - - - - -

Building upon the groundwork laid by the LHC Long-Lived Particle (LLP) Workshop in April of 2017 -- and continuing the robust and rich tradition defined by prior workshops such as “LHC Searches for Long-Lived BSM Particles: Theory Meets Experiment", at U. Mass, Amherst, in November of 2015; “Experimental Challenges for the LHC Run II", at the Kavli Institute for Theoretical Physics in May of 2016; and the “LHC Long-Lived Particles Mini-Workshop" at CERN in May of 2016 -- the LHC LLP Community -- composed of members of the CMS, LHCb, and ATLAS collaborations as well as theorists, phenomenologists and those interested in LLP searches with dedicated LHC detectors such as milliQan, MoEDAL, and MATHUSLA -- convenes again to finalize the community white paper and assess the state of LLP searches at the LHC.

This workshop is the second of two workshops devoted to producing an LHC LLP white paper that proposes a set of simplified models for LLP searches; contains an enumeration of gaps in the coverage of classes of BSM models that can produce LLPs; proposes recommendations for new triggering strategies for LLPs in ATLAS, CMS, and LHCb; lists ideas for new searches for LLPs; and proposes a set of recommendations for the presentation of search results to ensure future reinterpretation and recasting.

We will have three days of talks and breakout working sessions that will be geared toward finalizing the white paper and discussing the results produced by the working groups / chapter groups over the summer:

WG 1: Simplified models

  • A set of simplified models has been proposed.  Is anything missing?
  • Contacts to get involved: B. Shuve, D. Curtin, J. Shelton, Z. Liu, J. Evans, M. Ramsey-Mulsof (at Trieste), J. Zurita (at Trieste)

WG 2: Experimental coverage & recommendations for new searches

  • What gaps in coverage exist that should motivate new, improved, and/or expanded searches?
  • Contacts to get involved: A. de Roeck (in Trieste), J. Zurita (in Trieste), X. Cid Vidal (in Trieste), H. Russell, D. Curtin, J. Evans

WG 3: Triggers, detector upgrades, and HL- / HE-LHC

  • A few concrete, missing triggers in CMS and ATLAS were identified at the April workshop.  What did we miss that we've identified since then?  What studies have been performed to support possible detector upgrades that would improve sensitivity to LLP signatures?  What about the prospects, challenges, and opportunities with a high luminosity or a high energy (~25 TeV) LHC?  New, blue-sky ideas mandatory.
  • Contacts to get involved: M. Borsato (in Trieste), A. Coccaro, Y. Cheng

WG 4: Re-interpretations & recommendations for the presentation of search results

  • How do we make sure the published searches are optimally useful in the future?  What optimal set of information should be presented in experimental search results?  How do we encourage the collaborations to archive their analyses in a way that will enable the future production of accurate, robust, and experiment-controlled re-casting?
  • Contacts to get involved: J. Alimena (in Trieste), G. Hesketh (in Trieste), W. Buttinger (in Trieste)

WG 5: Dark showers

  • How do we address dark sectors with hadronization in a more detailed and comprehensive way, and what does this mean for the current searches in the experimental collaborations for this class of models?
  • Contacts to get involved: J. Scholtz (in Trieste), C. Cesarotti (in Trieste), J. Shelton, S. Knapen
  • Dedicated CERN egroup: llp-darkshowers

The first day of the workshop will, in addition, feature a joint session with the Re-interpretations workshop concluding that same day at Fermilab, in their morning and the afternoon in Trieste.

The next LHC LLP Community workshop will take place in the Spring of 2018.

- - - - - Note: Pre-workshop event  - - - - -

- - - - - Steven Weinberg lecture - - - - -

We're pleased to announce a special event on the 17th of October, the day before the workshop proper begins: Steven Weinberg is giving a talk in honor of the fact that October 17 is the 50th anniversary (to the day!) that his foundational paper, “A Model of Leptons”, -- without which probably none of us would be reading this -- was submitted to PRL, and our ICTP hosts have astutely arranged for a celebration including a talk broadcast live by Weinberg on “50 years of the SM” in the late afternoon of 17 October, followed by a reception.  We’re quite fortunate to have this connected to our workshop, and we encourage you to arrange to show up early on the 17th to be able to attend!

- - - - - Remote connection - - - - -

We're using Skype!  Join here:

https://join.skype.com/kuFeZLCexheb

- - - - - Workshop photo - - - - -

With text

Original

 

 

Registration
Registration for the second workshop of the LHC LLP Community
Participants
  • Abi Soffer
  • Albert De Roeck
  • Alberto Escalante Del Valle
  • Alessandro Davoli
  • Alexander Ledovskoy
  • Alexis Plascencia
  • Amir Mohammad Mostaed
  • Andre Lessa
  • Andrea Coccaro
  • Andrea De Simone
  • Andreas Albert
  • Anirban Saha
  • Ann Nelson
  • Anna Meneguzzo
  • Antonio Policicchio
  • Arjun Chhetri
  • Audrey Katherine Kvam
  • Brian Shuve
  • Cari Cesarotti
  • Carlos Vazquez Sierra
  • Cedric Weiland
  • Chris Hill
  • Christian Laner Ogilvy
  • Christian Ohm
  • Christina Borovilou
  • Colleen Treado
  • Cristiano Alpigiani
  • Cristiano Sebastiani
  • Cui Yanou
  • daniele barducci
  • Daniele Trocino
  • David Curtin
  • Dean Robinson
  • Doglioni Caterina
  • Dominik Krauss
  • Elena Dall'Occo
  • Emma Torro Pastor
  • Fabrizio Nesti
  • Felix Kling
  • Francesca Ricci-Tam
  • Gavin Hesketh
  • Geng-Yuan Jeng
  • Giacomo Bruno
  • Giovanna Cottin
  • Giuliano Gustavino
  • Greg Landsberg
  • Gregor Kasieczka
  • Haifa Rejeb Sfar
  • Henning Flacher
  • Henning Keller
  • Hideyuki Oide
  • Jakub Scholtz
  • James Beacham
  • Jan Heisig
  • Jennifer Kathryn Roloff
  • Jessica Prisciandaro
  • Jessie Shelton
  • Jingyu Luo
  • Jonathan Feng
  • José Francisco Zurita
  • Judita Mamuzic
  • Juliette Alimena
  • Karri Folan Di Petrillo
  • Kelvin Mei
  • Kevin McDermott
  • Konstantinos Vellidis
  • Lawrence Lee Jr
  • Lene Kristian Bryngemark
  • Lesya Horyn
  • Livia Soffi
  • Louie Dartmoor Corpe
  • Luigi Delle Rose
  • Lukas Alexander Heinrich
  • Malgorzata Kazana
  • Marco Farina
  • Marco Trovato
  • Marcus Hohlmann
  • Margaret Susan Lutz
  • martina vit
  • Martino Borsato
  • Mason Proffitt
  • Matt LeBlanc
  • Matthieu Marinangeli
  • Michael Adersberger
  • Miha Nemevšek
  • Monica Verducci
  • Nina Anikeeva
  • Pedro Schwaller
  • Philippe Mermod
  • Pieter David
  • Piotr Zalewski
  • Ramsey-Musolf Michael
  • Sara Leardini
  • Sascha Mehlhase
  • Sebastian Trojanowski
  • Serguey Petcov
  • Shin-Shan Yu
  • Silvia Pascoli
  • Simon Knapen
  • Stefan Antusch
  • Stefano Giagu
  • Steven Lowette
  • Steven Worm
  • Tamas Vami
  • Thomas Jacques
  • Todd Adams
  • Tova Holmes
  • Valerio Ippolito
  • Vasiliki Mitsou
  • Vince Velocci
  • Wei Shi
  • Weifeng Ji
  • Weinan Si
  • Wen Yi Song
  • Will Buttinger
  • Xabier Cid Vidal
  • Yangyang Cheng
  • Yuri Gershtein
  • Zaiem Slimane
  • Zhen Liu
    • 1
      Fifty Years of the Standard Model Leonardo Building Budinich Lecture Theatre (ICTP)

      Leonardo Building Budinich Lecture Theatre

      ICTP

      ICTP Leonardo Building Budinich Lecture Theatre

      October 17 is the 50th anniversary (to the day!) that the foundational paper, “A Model of Leptons”...

      https://inspirehep.net/record/51188

      ...was submitted to PRL, and Weinberg has agreed to broadcast a talk to our workshop in honor of the occasion.

      Watch remotely on ITCP's YouTube channel:

      https://youtu.be/mX2R8-nJhLQ

      Speaker: Prof. Steven Weinberg (UT Austin)
    • 2
      Reception
    • 3
      Welcome to ICTP Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Bobby Samir Acharya (Abdus Salam Int. Cent. Theor. Phys. (IT))
    • 4
      Introduction Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: James Beacham (Ohio State University (US))
    • 5
      Long-lived particles at the LHC in context Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Michael Ramsey-Musolf (U. Massachusetts Amherst)
    • 6
      Snapshot of current long-lived particle results at LHCb Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Carlos Vazquez Sierra (Nikhef National institute for subatomic physics (NL))
    • 7
      Snapshot of current long-lived particle results at CMS Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Albert De Roeck (CERN)
    • 11:10
      Coffee Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • 8
      Snapshot of current long-lived particle results at ATLAS Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Karri Folan Di Petrillo (Harvard University (US))
    • 9
      Workshop goals and white paper status Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: James Beacham (Ohio State University (US))
    • 13:00
      Lunch -- working group meet-and-greets over food Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • Lightning round: New ideas -- Session 1 Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      • 10
        Large radius tracking in ATLAS
        Speaker: Margaret Susan Lutz (University of Massachusetts (US))
      • 11
        ATLAS Fast TracKer (FTK) -- Info, status, and prospects
        Speaker: Tova Ray Holmes (University of Chicago (US))
      • 12
        ATLAS Fast TracKer (FTK) -- Overview of triggering constraints
        Speaker: Lesya Horyn (University of Chicago (US))
      • 13
        Upgrade studies at CMS in the context of LLPs
        Speaker: Henning Keller (Rheinisch Westfaelische Tech. Hoch. (DE))
    • 15:38
      Coffee Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • Joint session with Re-interpretations Workshop at Fermilab Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      • 14
        Re-interpretations and recasting of LLP searches from the experimentalist viewpoint

        Live from ICTP

        Speaker: Gavin Hesketh (University College London (UK))
      • 15
        Re-interpretations and recasting of LLP searches from the theorist viewpoint

        Live from Fermilab

        Speaker: Jared Evans
      • 16
        Discussion
    • 18:00
      Vino e formaggio Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • 17
      Simplified models for LLPs -- The LHC LLP Community proposal Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Brian Shuve (SLAC National Accelerator Laboratory)
    • 18
      Simplified models proposal -- open discussion Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Michael Ramsey-Musolf (U. Massachusetts Amherst)
    • 10:30
      Coffee Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • 19
      Re-interpretations and recommendations for the presentation of search results Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Follow-up discussion from previous day's joint session with Fermilab and conclusion of recommendations

      Speaker: Juliette Alimena (Ohio State University (US))
    • 12:00
      Lunch Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • 20
      Experimental coverage -- Overview Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: José Francisco Zurita (KIT)
    • 21
      Experimental coverage -- Discussion and brainstorming Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: José Francisco Zurita (KIT)
    • 15:00
      Coffee Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • 22
      Experimental coverage -- Part 2 Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      • a) Quirks -- Part 1
        Speaker: Marco Farina (Rutgers University)
      • b) Quirks -- Part 2
        Speaker: Simon Knapen (Lawrence Berkeley National Lab)
      • c) Codex-b
        Speaker: Dean Robinson (UC Berkeley)
      • d) FASER
        Speakers: Felix Kling (University of California, Irvine), Jonathan Lee Feng (University of California Irvine (US))
      • e) Experimental coverage -- Blue-sky session
    • 20:00
      Workshop dinner

      The workshop dinner will be at da Pino in Trieste.

      https://goo.gl/maps/3Ri8FVgB7Nn

      Be there at 20h!

    • 23
      Triggers and upgrades for LLP searches -- Part 1 Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speakers: Cristiano Alpigiani (University of Washington, Seattle), Elena Dall'Occo (Nikhef National institute for subatomic physics (NL)), Jessica Prisciandaro (Universidade de Santiago de Compostela (ES)), Yangyang Cheng (Cornell University (US))
    • 10:20
      Coffee Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • 24
      Triggers and upgrades for LLP searches -- Part 2 Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speakers: Alexander Ledovskoy (University of Virginia (US)), Lindsey Gray (Fermi National Accelerator Lab. (US)), Yuri Gershtein (Rutgers State Univ. of New Jersey (US))
      • a) CMS timing
        Speakers: Alexander Ledovskoy (University of Virginia (US)), Lindsey Gray (Fermi National Accelerator Lab. (US))
      • b) CMS hardware track triggers and LLPs at the HL-LHC

        https://arxiv.org/abs/1705.04321

        Speaker: Yuri Gershtein (Rutgers State Univ. of New Jersey (US))
    • 25
      Brainstorming on the future of LLP searches: Upgrades, high-luminosity and high-energy (~25 TeV) LHC possibilities Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Group brainstorming session

      Speakers: Martino Borsato (Universidade de Santiago de Compostela (ES)), Roberto Franceschini (Rome 3 U.)
      • a) CLIC and LLPs
        Speaker: Roberto Franceschini (Rome 3 U.)
    • 12:10
      Lunch Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • 26
      Dark showers Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speakers: Carissa Joyce Cesarotti (Johannes Gutenberg Universitaet Mainz (DE)), Jakub Scholtz (UW Seattle), Jakub Scholtz (Harvard), Jakub Scholtz (University of Washington), Siddharth Mishra Sharma (Universidad de Cantabria (ES)), Siddharth Mishra Sharma (Princeton University)
      • a) Dark showers WG -- Overview
        Speakers: Jakub Scholtz (Harvard), Jakub Scholtz (University of Washington)
      • b) Dark QCD: Jets vs. SUEP
        Speaker: Carissa Joyce Cesarotti (Johannes Gutenberg Universitaet Mainz (DE))
      • c) Semi-visible jets
        Speakers: Siddharth Mishra Sharma (Princeton University), Siddharth Mishra Sharma (Universidad de Cantabria (ES))
      • d) Dark showers -- discussion and brainstorming
        Speakers: Carissa Joyce Cesarotti (Johannes Gutenberg Universitaet Mainz (DE)), Jakub Scholtz (Harvard), Jakub Scholtz (University of Washington)
    • 15:00
      Coffee Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

    • Lightning round: New ideas -- Session 2 Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      • 27
        A new variant of dark matter freeze-out predicting long-lived particles at the LHC

        1705.09292

        Speakers: Jan Heisig (RWTH Aachen University), Jan Heisig (RWTH Aachen University)
      • 28
        MATHUSLA status and update
        Speaker: Audrey Katherine Kvam (University of Washington (US))
      • 30
        Monopoles at the LHC: ATLAS HIP search, Moedal, ATLAS/CMS beam pipe initiative
        Speaker: Philippe Mermod (Universite de Geneve (CH))
    • 31
      Summary and taking stock Giambiagi Lecture Hall

      Giambiagi Lecture Hall

      ICTP, Trieste, Italy

      Speaker: Sascha Mehlhase (Ludwig Maximilians Universitat (DE))