Events this week

Tuesday, July 22
NSD Seminar
Location: LBNL, 54-130 Perseverance Hall – 2:00 p.m.
Speaker: Valeria Pershina (GSI, Darmstadt)
TITLE: “Relativistic Quantum Theory for Chemical Identification of the Heaviest Elements”

Wednesday, July 23

BOSS lunch
Location: LBNL – tba

Brown Bag Instrumentation Talk
Location: LBNL, 50A-5132 – noon (Bring your lunch!)
Speaker: Kevin O’Brien (LBNL)
Title: “Controlling and Detecting Coherent Acoustic Phonons with Plasmons”
Abstract: Due to their large absorption cross-sections and high sensitivity to refractive index changes, nanoplasmonic resonators can be used to generate and detect coherent acoustic phonons up to terahertz frequencies. By designing plasmonic nanostructures exhibiting multimodal phonon interference, we can detect the spatial properties of phonon modes below the optical wavelength through the interplay between plasmons and phonons. This allows detection of complex nanomechanical dynamics by polarization-resolved transient absorption spectroscopy.

Particle Theory Seminar
Location: LBNL, 50A-5132 – 2:00 p.m.
Speaker: Giovanni Ridolfi (INFN Genoa)
Title: “Approximate NNNLO Higgs cross section from analiticity and resummations”
Abstract: We construct an approximate expression for the cross section for Higgs production in gluon fusion at next-to-next-to-next-to-leading order in $\alpha_s$ ($\alpha_s^3$ relative to leading order) with finite top mass. We argue that an accurate approximation can be constructed by exploiting the analiticity of the cross section in the space of the complex variable $N$, Mellin conjugate to $m_H^2/s$, and the information on its singularity structure coming from large $N$ (soft gluon, Sudakov) and small $N$ (high energy, BFKL) all order resummation. We find that the approximate N$^3$LO result amounts to a correction of $17\%$ to the NNLO QCD cross section for production of a 125~GeV Higgs at the LHC (8~TeV), larger than previously estimated, and it significantly reduces the scale dependence of the NNLO result.

Location: LBNL, INPA Room 50-5026, 3:30 p.m. – Students are welcomed!
Speakers: *N.V. Karpenka, F. Feroz, M.P. Hobson, Testing the mutual consistency of different supernovae surveys, /
Teach-In: courtesy of Jakob Nordin and David Rubin on Hamiltonian Monte Carlo techniques & STAN (Bayesian inference and modeling)

Friday, July 25
INPA Seminar
Location: LBNL, 50-5026, 12 p.m.
Speaker: Christopher Grant (UC Davis)
Title: An experiment dedicated to addressing the challenges of neutrino science in liquid Argon TPCs
Abstract: The Cryogenic Apparatus for Precision Tests of Argon Interactions with Neutrinos (CAPTAIN) program is designed to make measurements of scientific importance to long-baseline neutrino physics and physics topics that will be explored by large underground detectors. To address the challenges facing future long-baseline neutrino detectors, the CAPTAIN collaboration is commissioning two liquid Argon time projections chambers (LArTPCs) and a liquid Argon well counter, all of which will be positioned in particle beams over the next few years. This talk will give an overview of the physics importance of the CAPTAIN program and outline the initial beam measurements that will be made by the CAPTAIN series of detectors. A more detailed outline will be presented of work performed at the Crocker Nuclear Laboratory 67 MeV proton cyclotron involving neutron-Argon cross-section measurements, an effort to constrain our understanding of backgrounds for supernova neutrino detection in liquid Argon.


Please check back in Fall 2014 when the regular seminar schedule will resume.



Visitors Program

We maintain an active program for visiting scholars. BCCP hosts visitors at all levels, from senior scientists to postdocs, graduate students, and undergraduates. If you would like to visit BCCP, please fill out the form here.

Longer term visits involving collaborative activities with BCCP members are especially encouraged. BCCP can provide financial support for longer term visitors working with BCCP members on BCCP related projects. The applications are reviewed by a committee several times a year. All decisions are based on the availability of space and funding.

Summer 2014

  • Louis Garrigue (ENS-Ecole Normale Supérieure, Paris) – March 17-July 11
  • Jeremy Tinker (NYU) – June 17-August 21
  • Tamara Davis (U of Queensland) – June 24-27
  • Geraint Lewis (U of Sydney) – June 26-27

Spring 2014

  • Evan Scannapieco (ASU) – January 3-May 31
  • Irshad Mohammed (University of Zurich) – January 9-June 30
  • Miguel Zumalacárregui (University of Heidelberg) – January 22-February 10
  • Paul Shellard (University of Cambridge) – February 6-7
  • Arka Banerjee (University of Illinois, Urbana-Champaign) – February 9-22
  • Tong-Jie Zhang (Beijing Normal University) – February 27-May 27
  • Zvonimir Vlah (Univ of Zurich, ITP) – March 3-April 2
  • Louis Garrigue (ENS-Ecole Normale Supérieure, Paris) – March 17-July 11
  • Neal Dalal (Univ of Illinois) – March 26-28
  • Steffen Hess (AIP, Leibnitz Inst for Astrophysics, Potsdam) – May 12-22

Fall 2013

  • Elizabeth Krause (U Penn) – September 10-11
  • Zvonimir Vlah (Univ of Zurich, ITP) – September 17-December 20
  • Michael Kopp (LMU) – October 28-November 2
  • Juliana Kwan (Argonne National Lab) – November 13-22
  • Amol Upadhye (Argonne National Lab) – November 13-December 20
  • Teppei Okumura (IEU Korea) – November 13-30
  • Jonathan Blazek (OSU) – December 5-13

Summer 2013

  • Azadeh M. Dizgah (SUNY-Buffalo) – May 16-July 16
  • Jeremy Tinker (NYU) – May 30-August 20
  • Sudeep Das (Argonne National Lab) – July 9-27
  • Daniel Holz (Chicago) – August 27-28
  • Neal Dalal (Illinois) – August 30,
  • Wayne Hu (Chicago) – August 29-30
  • Joel Johansson (Stockholm) – August 29-30

Spring 2013

  • Alireza Hojjati (IEU Korea) – January 14-February 5
  • Chris Blake (Swinburne) – January 14-February 5
  • Tamara Davis (Queensland) – January 14-18
  • Morag Scrimgeour (Western Australia) – January 14 -
  • Sudeep Das (Argonne National Lab) – January 28-31
  • Chiaki Hikage (Nagoya University) – February 10-16
  • Miguel Zumalacarregui (Universidad Autonoma de Madrid) – February 15-22
  • Jaiyul Yoo (Univ. of Zurich) – February 23 – April 27
  • Laura Baudis (Univ. of Zurich) – April 26-May 4

Fall 2012

  • Stephen Appleby (IEU Korea) – October 7-26, 2012
  • Roland de Putter (Caltech/JPL) – October 19-25, 2012
  • David Pietrobon (JPL) – October 19-26, 2012
  • Tobias Baldauf (ITP, University of Zurich) – September 12-December 9, 2012
  • Johan Samsing (DARK Cosmology Centre, Copenhagen) – February-December 2012
  • Masanori Sato (Nagoya University, Japan) – October 5 – November 22, 2012
  • Andreu Font (University of Zurich) – November-December 2012
  • Teppei Okumura (Institute for the Early Universe, Seoul, Korea) – November 5-December 21, 2012


BCCP Seminars

There are no BCCP seminars scheduled at this time. Seminars will resume Fall 2014. Please check back.

Have a great summer !


BCCP Lunches

BCCP Lunch Events

BCCP Lunch Events usually take place in Hearst Field Annex  (HFA) B-1 at noon. The venue and dates may be subject to change. To keep you notified, please contact Melissa Barclay ( to be added to the lunch mailing list.


Oliver Zahn


Zahn originally came to Berkeley as inaugural BCCP Fellow after undergraduate work at Max-Planck-Insitute for Astrophysics and NYU, as well as doctoral work at Harvard and Heidelberg.

He recently became the executive director of BCCP and as such oversees the centers’ cosmology program as well as its new interdisciplinary data science initiative. Zahn is a multipurpose cosmologist, advancing the understanding of the origin and evolution of structure in the Universe by applying a variety of statistical methods to complementary astrophysical observables. He connects data to theory through cutting edge numerical simulations of cosmological structure formation.

 Zahn frequently analyses terabyte surveys of the Cosmic Microwave Background, Galaxies, and Galaxy clusters for to generate insights into the workings of the cosmos. He has also been involved in studies exploring the redshifted 21 cm line as a new cosmological probe, and his research has acted as a driver for pushing a new generation of radio telescopes that might revolutionize studies of reionization, inflation, and dark energy/gravity theory.  By maintaining a data driven  approach,  Zahn has achieved several “firsts” and other important findings together with his working groups.