New Physics at the LHC Run 2

Date :From 2016-07-11 To 2016-08-05
Advisory committee :
Local coordinators :Qinghong Cao, Tianjun Li, Manqi Ruan, Jing Shu,Kai Wang, Jinmin Yang
International coordinators :Yang Bai, Tao Han, Shufang Su, Lian-Tao Wang

Scientific Goal


The LHC Run 1 has had a successful physics program, culminating in the discovery of a
SM-like Higgs particle with a mass of 125-126 GeV. The LHC will restart in 2015, running at higher energies, and is scheduled to collect a significant amount of data, about 50 inverse fb, till summer 2016. We expect to obtain interesting physics results, perhaps early indications of new physics beyond the Standard Model (SM), starting 2016. The significant increase in the center-of-mass energy, from 8 TeV to 13-14 TeV, will give us a direct probe of the TeV scale, an energy frontier at which new physics is highly expected to appear. It is thus crucial to focus on implication of LHC Run 2 data in a timely fashion. The specific content of this program will of course depend on the outcome of LHC Run 2 operation, and it will emphasize on addressing whatever physics issues arising from LHC data. It could include detailed understanding of the SM physics, discussions on potential indications of early discovery, as well as possible implications for theoretical models, and directions for further experimental studies. We also note that there are many non-LHC experiments which will produce interesting results in the next couple of years, including dark matter searches, and flavor and CP measurements. While the main focus of our workshop is on topic directly related to LHC data, it will also aim at effectively combining the LHC results with such experiments, and deriving information about new physics. The workshop will also reflect the on-going effort in China on the study of future circular machines. Results from LHC Run 2 will certainly have important implication on physics that can be studied at a future precision Higgs factory or an even higher energy pp machine. In light of many potential interesting data in 2016, this program will emphasize on data-driven model building. Especially, the LHC Run 2 may provide us some hints about the new physics beyond the SM. For each interesting topic, we will start from experimental talks about the latest search results and then discuss their implications for existing models like MSSM, extra-dimension models and other brand new models. This will occupy the majority of time for the first two weeks. In this program, we will also emphasize on the complementarity of collider, direct and indirect searches for dark matter. For some fraction of time, we will also concentrate on other flavor physics results from the LHCb or other experiments. In mainland China there is a community of physicists actively working on new physics beyond the SM at the LHC. This program will boost and strengthen the international and collaboration between Chinese physicists and their international colleagues, which will certainly be beneficial to both. We propose to have a conference associated with the program. We would also strongly encourage the participation of experimentalists.

We expect that this program will have 8-10 overseas physicists at any one time. Over-seas physicists would have to commit to about three weeks to get full support, in which case appropriate accommodations and per diem would be supported, as well as reasonable travel expenses. Experimentalists could have the option to participate either as seminar speakers or shorter term guests. The numbers of participants from mainland China would be decided in consultation with the KITPC. In the meanwhile, we will also coordinate with the Center for Future High Energy Physics at the IHEP. This will allow us to bring in more participants from abroad.

Program Activities
We propose the following activities for this workshop program.
• A topical conference, about three days, exact dates to be determined and could be during the week from July 26 to July 28.
• Seminars, about two per weekday. We will try to have one experimental talk and one back-to-back theory talk in the morning, with one expected from domestic contributors. We
will have more discussion, either free discussion or organized discussion, in the afternoon.The relevant topics could include: updates on Higgs properties, searches for top partners, searches for extra Higgs-like particles, supersymmetry particle searches, Kaluza-Klein particle searches, dark matter searches, Charm or B-meson related results, and so on.
• Lunch time casual talks on “what I am working on recently, and why it is interesting”, about one per week, less technical and very informal. Participation of the audience are strongly encouraged. If there is enough student interest, we will set up a once-per-week lunch time informal talks on: “how I become a particle physicist” to discuss the career path.
• Weekly journal club, where graduate students and postdocs (mostly from Chinese participants for the workshop and students/postdocs from Universities and Institutions in
Beijing) talk about their current research or reading project. It will be a platform for junior researchers to practice their technical presentation skill and improve their interaction with other physicists.
• Coordinating activities with the Center for Future High Energy Physics at the IHEP to attract more international and domestic participants.
• Daily afternoon tea/coffee time, about half an hour to one hour. The coffee/tea time could be arranged to be after talks for more interactions between workshop participants.
• Public lectures and/or KITPC Colloquia, given by prominent participants from oversea.
• In the middle of each week, we will organize a group dinner to have more casual interac tions with each other.