Daily Bulletin

General Announcements

Banquet

• When - July 9 (Mon) 19:00-21:00
• Where - Vista Hall, B2F, Vista Walkerhill Seoul (Approx. 30 mins by bus)
• Round-trip shuttle buses are prepared
• Shuttle buses will depart from 18:40 at COEX North gate. A bus arrives every 2 minutes until 19:10. There will be enough buses for all participants.
• To attend the banquet, tickets must be purchased in advance. Please visit the registration desk on 3F (USD 100 for on-site purchase)
• NO TICKET, NO BUS

Poster Showcase

• The three best poster award winners (one 1st winner and 2nd winners) will have each 5 minutes talk at the Poster showcase (July 11 (Wed), 12:20 - 12:40, Auditorium, 3F, Coex).

Best Poster Award

• 1st – 1 Winner ($300)
• 2nd – 2 Winner ($200)
• 3rd – 5 Winner ($100)
• The three best poster award winners (one 1st winner and 2nd winners) will have each 5 minutes talk at the Poster showcase.

Public Lecture II - Prof. Michael S. Turner

• When & Where - July 10 (Tue) 19:30-21:00, Auditorium, 3F, COEX “Quarks and the Cosmos” by Prof. Michael Turner
• Abstract: http://www.ichep2018.org/02_program/s21.html#PublicLectures
• ICHEP2018 Registrant: No further sign up / registration required. Please bring your nametag with you.

Directors Forum

• There is a special round-table discussion names "Directors Forum". The Forum will focus on various aspects of future of HEP. All the participants, especially students and young researchers can ask questions. If you have specific questions in mind which you want to send to the Lab Directors, please send the question to the Program Committee via an email yjkwon63@yonsei.ac.kr. We will consider questions delivered by 11 pm, July 9 (Mon.). Please make sure you set the title of your email as 'Forum Question'. Otherwise, we may miss your questions.

Water Station, Registration Desk, Coffee Break

• Will be moved to 3rd floor during Plenary Session period

Session Summaries - Day 4, July 7 (Sat) & Day 5, July 8 (Sun), 2018

The fourth and final day of the parallel sessions at ICHEP 2018 ended with 15 parallel sessions, including one new parallel session. On the fifth day, there were ICFA / LCB, Hyper-K, DUNE, C11, IBS Festival satellite meetings.

Highlights of parallel sessions are presented below.

Beyond the Standard Model

• New physics from precision measurements such as isotope shifts, muonic hyperfine structure and meson decays, etc, were discussed.
• Muon g-2 experiment at Fermilab is taking data and going well, so the first physics results with statistics comparable to BNL will be published in early 2019.
• SModelS is a conservative but fast-running simulation program for collider bounds, decomposing the full model into simplified model components and having the interface with micrOMEGAs. Database includes 270 simplified model results from SUSY searches and it was extended with 19 Run 2 analysis from CMS.
• Belle II experiment in phase 3 is planned to operate in Feb 2019. R(D(*)), B->D tau and B->K nu nu will be measured with more precision. R(D(*)) anomalies, which is 3.78 sigma away from the SM (in HFLAV summer 2018), could be confirmed with 5 ab^-1 data at 5 sigma level. The SM confirmations of B->D tau and B->K nu nu need 1-3 ab^-1 and ~18 ab^-1 data, respectively. B(B-> K nu nu) can be a sensitive probe for light dark matter.
• B-> l nu with l=mu, tau in Belle and Belle II is a sensitive probe to new physics, providing additional insight to R(D(*)) anomalies.
• New physics searches at future colliders such as LHeC, FCC-eh, ILC, CLIC, etc, were discussed. Searches for hidden light sector was discussed in the context of SHiP and NA62 experiments.
• ATLAS Searches for new resonances decaying either to pairs of top quarks or a top and a b-quark are discussed. (July 6)
• Overview of CMS searches for new physics with top and bottom quarks are presented with emphasis on heavy gauge bosons and excited third generation quarks. Improvement upon analysis techniques are discussed, including jet substructure techniques. (July 6)

Neutrino Physics

• The last day of neutrino sessions were mostly devoted to current and future
• long baseline experiments and neutrino-less double beta decay (NDBD) experiments/theory.
• T2K doubled statistics in both neutrino and anti-neutrino modes, obtained a new result ruling out CP conservation with 2 sigma level, and updated other neutrino oscillation parameters.
• NOvA took the first anti-neutrino data and observed electron anti-neutrino appearance with > 4 sigma. NOvA excludes delta_CP = pi/2 in IH with > 3 sigma and prefers NH at 1.8 sigma.
• Neutrino CP violation studies were covered by ESSnuSB and Hyper-Kamiokande (Hyper-K). The Hyper-K 2nd detector in Korea seems to be very promising in various physics sensitivities and excellent addition to the 1st detector in Japan.
• The NBND session covered the theoretical perspective, new results of the running experiments and progresses of the planning future projects. CUORE, CUPID-0, AMoRE-pilot, CANDELS, GERDA, MAJORANA, EXO-200 and NEMO-3 presented new or updated results. Particularly, KATRIN had been successfully commissioned with tritium and measured the first electrons. Next-generation projects like LEGEND and nEXO demonstrated their physics potential and R&D efforts to improve the sensitivity of NDBD half-life from 1026 to 1028 years, in order to entirely cover the Inverted Hierarchy region.
• CMS and ATLAS updated their complementary searches for heavy neutrinos. Knowing that neutrinos are Majorana or Dirac is most important to go beyond SM and very interesting theoretical studies on this have been done for collider searches.

Quark and Lepton Flavor Physics

• A new CPV effect is found in D-> k_s f. It is accessible at Belle II and LHCb. dCPV is promising to search for NEW Physics at the tree level.
• The KLOE-2 experiment successfully completed its data taking campaign, collecting L=5.5 fb^-1 by the end of March 2018. The analysis of the full KLOE data set is being completed:
  - ew measurement of the KS semileptonic charge asymmetry (paper submitted)
  - first test of T and CPT in neutral kaon transitions: analysis in advanced phase
• MEGII completed the construction of all sub detectors. The beam line is ready. A full engineering run is expected for next year (2019) followed by 3 years of physics run.
• Mu3e completed the sub-detector R&D phase and is in the prototyping phase. Pre- and full- engineering runs are expected during 2019-2020 followed by data taking.
• Mu2e is following the construction schedule with data taking expected to start on 2022.
• COMET will start the commissioning for phase I at the end of 2019.
• DeeMe will start soon after completing the H-line construction.
• Preliminary results of Lorentz structure of tau decay and rare tau decays have been delivered from Belle together with a first measurement of Michel parameters via tau-> l gamma nu nu.
• Babar released new results on tau-lepton decays.
• Physics case for lepton flavour violation induced by a neutral scalar at future colliders have been discussed.
• LFV in the context of Radiative Neutrino Mass model has been presented. mu -> eee can dominate versus mu->e gamma and mu-e conversion thanks to the box diagram contribution at which the decay can access.
• CMD-3 has taken ~160 pb^-1 of data in the energy range 0.32 ≤ sqrt(s) ≤ 2.0 GeV and plans to take a further ~1fb^-1 in the next few years. The upgrade of the detector will strongly contribute on the physics analysis program that just started.

Dark Matter Detection

• Good progress has been made toward larger detectors for the Liquid Xe WIMP Dark Matter search; PandaX, LUX-Zeplin (LZ) and XENON Collaborations are all on track to approach the neutrino floor in the next years. Extreme technologies and materials selection have been exploited in order to achieve the ultra low level of backgrounds needed for the foreseen multi-ton year exposure.
• Liquid Argon community (DarkSide, DEAP, ArDM, CLEAN) has finally joined in a common effort toward next generation DarkSide experiments (20k and beyond) targeted to exploit a hundred ton year exposure zero background WIMP search on the SI sector.
• The Darkside-50 experiment presented results: after 600 days of running new bounds are set on few-GeV WIMPs using their electron-scatter analysis. The Darkside-20k collaboration presented a plan to unify liquid argon dark matter experimental groups to produce the next generation liquid argon experiment that combines improved detector technology and liquid argon purification to greatly increase sensitivity.
• The NEWS-G experiment presented competitive limits in the search for very light wimps with masses well below 1 GeV, and plans to improve that sensitivity and explore even lower masses by using different gas mixtures.

Top Quark and Electroweak Physics

• The final session of the Top Quark and Electroweak programme focused on top mass measurements now and top quark physics at future accelerators.
• New NLO simulation results including distributions from the WHIZARD generator, for QCD and electroweak corrections at top threshold were presented including detailed discussions of the uncertainties due to threshold matching were presented (Reuter).
• The D0, ATLAS and CMS Collaborations presented direct top mass and pole mass measurements measurements at 1.96, proton-antiproton, 7,8 and 13 TeV proton-proton collisions, including a new CMS measurement in the all-hadronic channel using the 2016 dataset (Soldner-Rembold, Barillari, Kovalchuk).
• Prospects in top quark physics in mass measurements and BSM sensitivity (e.g., flavour-changing neutral currents) for high-luminosity LHC, the first CLIC stage with electron-positron collisions at 380 GeV, FCC-ee and FCC-hh were presented (Savin, Zarnecki, Helsens). These projects intend to present new results by the end of 2018.

Detector: R&D for Present and Future Facilities

• The first session focused on LHCb and Belle II upgrades. LHCb has collected an impressive amount of data till now and they continue to push further with an ambitious upgrade plan, upgrading pretty much all sub-detectors, aiming to improve the physics potential by improving tracking and particle identifications. The full Belle II detector will be in operation from next spring, which should also benefit from the many new detector additions and upgrades. The competition from these two experiments will start to heat up.
• The second session focused on searches for µ-e conversions. COMET, Mu2e and Mu3e presented updates.
• The third sessions had updates from many different experiments including, MEG II, KLOE-2, KOTO, followed by fast timing tracking and calorimeters and diamond detectors.
• The final sessions had updates from various detectors including the massive PMTs for JUNO, Large Area Picosecond Photo Detectors, MSMGRPC, Resistive Micromegas and growing scintillation crystals.

Astro-particle Physics and Cosmology

• Day 3 in Astro-particle/Cosmology session is mainly for the space-borne experiments, DAMPE, CALET, AMS and also ISS-CREAM.
• Space-born experiments DAMPE, CALET, and AMS all presented new results on the combined electron and positron flux. While all the three experiments observe a change in the flux behavior at ~1 TeV, there is a significant discrepancy in the energy range from 100 to 800 GeV between AMS and CALET on one hand and DAMPE (and Fermi-LAT) on the other.
• Change of spectral indexes of proton and Helium fluxes at ~200 GeV observed by PAMELA, CREAM, and AMS detectors is explained by considering temporal evolution and the local sources like supernova remnants and pulsars.
• The ISS-CREAM experiment installed on the Space Station in 2017 is ready to deliver its first results on cosmic ray nuclei in the nearest future.
• The GAPS experiment is well on track for its long duration flight in 2020.
• Light Dark Matter candidates, including axions and keV sterile neutrinos, were discussed along with the experimental detection prospects.
• The DES experiment presented new results based on up to 3 years of data. In particular, the 3-year BAO results at z≤1 are compatible with Lambda-CDM.

Heavy Ions

• Heavy Ion session in the morning was focused on future experiment and some soft and hard probes.
• There are two scientific challenges of heavy ion collision experiments in future: (1) The search for the 1st order phase transition and critical end point, with low sqrt(s) and high luminosity: NICA, NA61, CBM, (2) The parton distribution function research with using electron-hadron collision at high energies: LHeC, FCC-eh.
• There is also a fixed target experiment at LHC suggested together with currently available at LHCb.
• A systematic study done by NA61 with varying system size (Ar+Sc) and suggesting ‘Onset of Fireball’ can be attractive and NICA is actively preparing for MPD regarding Critical-Endpoint search.
• For jets, the nuclear modification of jet was measured up to 900 GeV in central PbPb at ATLAS. Dijet asymmetry is found similar between XeXe and PbPb. Gamma-tagged jets show additional suppression at high pT and enhancement at low pT in comparison to the inclusive jet measurement.
• Heavy Ion session in the afternoon was a mixed bag with talks on very different topics:
  - There was major progress on soft QCD measurements with ALICE over the last years, providing evidence for multi-parton interactions in small systems.
  - ALICE has measured charged and full jets in pp, p-Pb, and Pb-Pb collisions. No significant modification of the structure was observed for the jets that are suppressed in Pb-Pb collisions with respect to pp. Studies of jets with charm and beauty hadrons are starting.
  - Spin alignment of K* was observed by ALICE in Pb-Pb collisions at low pT.
  - CMS has observed the top quark for the first time in p-Pb collisions, and uncertainties on measured W-boson cross sections are small enough to constrain nuclear PDFs.
  - Low-mass dielectron measurements from ALICE are consistent with the expectation from hadronic sources in pp and Pb-Pb collisions, and they provide information of heavy-flavor cross sections and direct photons.
  - ALICE has measured charged-particle spectra in p-Pb, Xe-Xe, and Pb-Pb collisions. The nuclear modification factor in Xe-Xe and Pb-Pb collisions scales with the charged-particle multiplicity giving access to the path-length dependence of radiative energy loss in the medium.
• Overall all presentations were received very well and give thanks to every participant including speakers in HI sessions.

Strong Interactions and Hadron Physics

• The third day started with jet physics at the LHC where several of them were detected in coincidence with various Bosons. Also charmed mesons within jets in conjunction with W and Z bosons were presented. These various measurements provide precision input for PDFs as well as tests of the description in various generators and loop levels. Further presentations concentrated on the underlying event and double parton scattering.
• The second session concentrated on spectroscopy measurements from various e+e- colliders as well as an entirely new, simultaneous measurement of Lambda and Anti-lambda polarization at BESIII. The alpha parameter was found to be about 17% larger and 5 standard deviations away from the previous measurements from the 70's which are quoted in the PDG.
• The remaining sessions were dedicated mostly to spectroscopy and especially the study of XYZ states. More details were obtained on various states such as spin and parity, etc. There are different results between D0 and LHC/CDF for the X(5568) which is seen by the former but not the latter experiments. The last presentation had to be shifted from the previous day and contained very forward jets in the CASTOR experiment to probe gluon saturation at low x.

Higgs Physics

• Here is the day 3 report from the Higgs sessions.
• Correction: the day 2’s dihiggs search in the bbtautau channel from ATLAS was performed with 36 fb^-1, not 80 fb^-1.
• CMS tH combination constrains yt: positive yt is preferred at 1.5 sigma, tH limit becomes about 27 times the SM.
• ATLAS updated their couplings combination, using 80 fb^-1 for gamma gamma, 4l, mumu and 36 fb^-1 for the other channels - good compatibility with the SM is observed.
• Projections were shown for new accelerator projects (ILC, CLIC, HL- LHC, FCC (ee, eh, hh), LHeC).

Computing and Data Handling

• In the morning session, speakers from various collaborations/communities discussed cutting edge HEP computing models, whose developments are motivated by the increasing HEP data size and large amount of observables.
  - LHCb presented Turbo, the data format used to extract core physics objects from the high level trigger information for real time analysis.
  - ATLAS explained the roles and activities of the multiple software/middleware systems used to control its distributed computing system over the international Grid network.
  - ALICE showed the O2 framework, which is being developed for the LHC Run III phase. This framework employs the structure of array concept to optimize the IO performance.
  - HEPFit presented an open source tool which fits experimental data with phenomenological models. This tool is fast and applicable to many interesting subject areas of HEP.
• The afternoon session focused on physics object reconstruction and performance. We heard from CALICE about shower reconstruction in highly granular imaging calorimeters, LHCb particle identification performance, and their strategy of collecting PID calibration samples in their software trigger. Lively discussion was provoked by interleaving ATLAS and CMS talks on jet, muon, and tau object reconstruction. The people that work in these areas are very expert in what they do. It was fun watching them interact and share ideas.

Accelerator: Physics, Performance, and R&D for Future Facilities

• Saturday’s Accelerators session was devoted to presentations summarizing the progress toward future electron-positron colliders as well as high energy beams of electrons.
• FCC-ee design is actively progressing at CERN with many countries involved towards the 350 GeV center-of-mass energy circular collider located in 100 km tunnel.
• Active progress towards finalizing the design of a 250 GeV Higgs factory based on electron-positron collider in China (CepC) has been reported with details on R&D for all major collider complex systems.
• The 250 GeV ILC design and progress toward realization in Japan indicated exciting new developments in optimizing SCRF system for such machine.
• CLIC electron-positron collider at CERN with energy of 380 GeV design was presented with progress toward European Strategy update documents summarized.
• Proposal for a electron-positron collider with low energy and high luminosity for production and studies of pairs of muons in Novosibirsk is already under construction and will provide large samples to study di-muonium.

Formal Theory Development

• There were two talks on confinement and one on cosmological constant.
• In the first talk, a universal law on the mass of the ground state glueball is conjectured, which is well supported by the lattice calculation and will lead to understanding in confinement problem of Yang-Mills theory.
• The second talk discussed the properties of Yang-Mills theory with nonzero theta parameter to find the spontaneous breaking of CP symmetry and vanishing the mass gap.
• Final talk was on the cosmological problem in quantum gravity and it was argued the resumed quantum gravity gives the right value for the cosmological constant of our universe.

Education and Outreach

• On the hunt for new audiences, ATLAS has targeted music festivals. Millions of people around the world go to enjoy music, literature and culture, and now they have chance to enjoy physics at these festivals.
• A planetarium show has been produced, “Phantom of the Universe: The Hunt for Dark Matter” narrated by Tilda Swinton (http://phantomoftheuniverse.com/).
• The importance and progress of physics in Africa was highlighted.

Diversity and Inclusion

• The overall message from the Diversity and Inclusion session was that while we are generally headed in the right direction, we have much to do. Most talks considered diversity along the lines of sex (male and female). Additional ideas included:
  - Other underrepresented minorities, particularly African Americans whose participation in scientific pursuits appears to be dropping.
  - Analysis of Diversity -- different identity groups in a community, and number of each group, using various indices it was shown that the concentration of results into large organisations results in a decrease in organisational diversity, while national diversity is increased.
• ATLAS showed some statistics on the gender and regional diversity of their members, and management LHCb shared their efforts to reduce obstacles and sources of inequality considering both explicit discrimination and implicit discrimination.
• CERN’s Diversity office shared CERN’s effort to increase diversity and inclusion by working with teachers in national and international groups, and their efforts to improve the quality of life of CERN employees.
• The CERN experiments both showed a lack of involvement from Africa, and a separate presentation detailed many successful interventions in Africa aiming at changing this (beyond South Africa).
• The Port Hackathon project representative showed high energy physicists having an impact of societal problems, and explained that having an efficient organisation coordinating projects which utilise out scientific skills is an important component in developing a more diversity HEP community as it connects us to the general population in an easily demonstrable way.