Tevpa 2017.Pdf

Total Page:16

File Type:pdf, Size:1020Kb

Tevpa 2017.Pdf 東京大学 2004.2.12 シンボルマーク+ロゴタイプ 新東大ブルー 基本形 漢字のみ 英語のみ TeV frontier in particle astrophysics Hitoshi Murayama (Berkeley, Kavli IPMU) TeVPA 2017, Columbus, Aug 11, 2017 東京大学 2004.2.12 シンボルマーク+ロゴタイプ 新東大ブルー 基本形 漢字のみ 英語のみ sub-GeV frontier in particle astrophysics Hitoshi Murayama (Berkeley, Kavli IPMU) TeVPA 2017, Columbus, Aug 11, 2017 +Yonit Hochberg, Eric Kuflik matter Ωm changes the overall heights of the peaks matter Ωm changes the overall heights of the peaks nDM 10 GeV =4.4 10− WIMP Miracles ⇥ mDM DM SM DM SM “weak” coupling correct abundance “weak” mass scale Miracle2 nDM 10 GeV =4.4 10− WIMP Miracles ⇥ mDM DM SM ↵2 σ2 2v h ! i⇡m2 2 ↵ 10− ⇡ m 300 GeV DM SM ⇡ “weak” coupling correct abundance “weak” mass scale Miracle2 sociology • Particle physicists used to think sociology • Particle physicists used to think • need to solve problems with the SM sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc • it is great if a solution also gives dark matter candidate as an option sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc • it is great if a solution also gives dark matter candidate as an option • big ideas: supersymmetry, extra dim sociology • Particle physicists used to think • need to solve problems with the SM • hierarchy problem, strong CP, etc • it is great if a solution also gives dark matter candidate as an option • big ideas: supersymmetry, extra dim • probably because dark matter problem was not so established in 80’s 10 7 Interpretation -36 -36 superCDMS ] 10 ] 10 CDMSlite 2 CMS 2 CMS 10-37 10-37 -38 -38 SIMPLE 2012 direct detection 10 CMS, 90% CL, 7 TeV, 5.0 fb-1 10 - COUPP 2012+ 10-39 10-39 W CMS, 90% CL, 8 TeV, 19.7 fb-1 Super-K W µ -1 -40 (χγ χ)(qγ q) -40 CMS, 90% CL, 7 TeV, 5.0 fb µ - 10 10 +W CoGeNT 2011 Λ2 IceCube W -41 Vector -41 CMS, 90% CL, 8 TeV, 19.7 fb-1 10 SIMPLE 2012 10 (χγ γ χ)(qγ µγ q) 10-42 10-42 µ 5 5 Axial-vector operator 2 COUPP 2012 Λ -43 -43 10 CDMS II 10 χχα (Ga )2 -1 XENON1t s µν CMS, 90% CL, 8 TeV, 19.7LHC fb -44 -44 10 3 10 4Λ XENON100 -Nucleon Cross Section [cm -45 Scalar -Nucleon Cross Section [cm -45 χ 10 LUX 2013 χ 10 Spin Dependent Spin Independent 10-46 10-46 1 10 102 103 1 10 102 103 Mχ [GeV] Mχ [GeV] Figure 5: Upper limits on the DM-nucleon cross section, at 90% CL, plotted against DM particle mass and compared with previously published results. Left: limits for the vector and scalar operators from the previous CMS analysis [10], together with results from the CoGeNT [60], SIMPLE [61], COUPP [62], CDMS [63, 64], SuperCDMS [65], XENON100 [66], and LUX [67] collaborations. The solid and hatched yellow contours show the 68% and 90% CL contours + respectively for a possible signal from CDMS [68]. Right: limits for the axial-vector operator e from the previous CMS analysis [10], together with results from the SIMPLE [61], COUPP [62], γSuper-K from [69], dSph and IceCube [70] collaborations. Figure 6: Observed limits on the mediator mass divided by coupling, M/pgcgq, as a function of the mass of the mediator, M, assuming vector interactions and a dark matter mass of 50 GeV (blue, filled) and 500 GeV (red, hatched). The width, G, of the mediator is varied between M/3 and M/8p. The dashed lines show contours of constant coupling pgcgq. K = s /s of 1.4 for d = 2, 3 , 1.3 for d = 4, 5 , and 1.2 for d = 6 [71]. Figure 7 shows 95% NLO LO { } { } CL limits at LO, compared to published results from ATLAS, LEP, and the Tevatron. Table 7 shows the expected and observed limits at LO and NLO for the ADD model. Figure 8 shows the expected and observed 95% CL limits on the cross-sections for scalar un- ~~ ~ 0 ~ 0 ~ 0 ~ 0 t t production, t → b f f' χ∼ / t → c χ∼ / t → W b χ∼ / t → t χ∼ Status: ICHEP 2016 1 1 1 1 1 1 1 1 1 1 600 ATLAS Preliminary s=13 TeV ~ 0 ~ 0 -1 t → t ∼χ / t → W b ∼χ t0L 13.2 fb [CONF-2016-077] [GeV] 1 1 1 1 0 1 ~ 0 -1 ∼ χ t → t ∼χ t1L 13.2 fb [CONF-2016-050] 500 1 1 m ~ 0 t → W b ∼χ -1 1 1 t2L 13.3 fb [CONF-2016-076] ~ 0 -1 t → c ∼χ MJ 3.2 fb [1604.07773] 1 1 s=8 TeV, 20 fb-1 Run 1 [1506.08616] 400 Observed limits Expected limits All limits at 95% CL 300 W t + m 0 ) < m b 0 ) < 0 ∼ 1 ,χ ∼ 1 χ ~ t 1 , 0 ) < m ~ t 1 ∼χ 1 m( ~ , m( t 1 ∆ ∆ 0 m( c ∼ ∆ 200 χ1 0 b f f' ∼ χ1 100 13 TeV 8 TeV LQ1(ej) x2 LQ1(ej)+LQ1(νj) β=0.5 0 coloron(jj) x2 W b ∼ LQ2(μj) x2 χ1 LQ2(μj)+LQ2(νj) β=0.5 coloron(4j) x2 LQ3(τb) x2 Leptoquarks Multijet LQ3(νb) x2 gluino(3j) x2 LQ3(τt) x2 Resonances LQ3(vt) x2 gluino(jjb) x2 0 Single LQ1 (λ=1) 200 300 400 500 600 700 800 900Single LQ2 (λ=1) 0 1 2 3 4 TeV 0 1 2 3 4 TeV ~ ADD (γ+MET), nED=4, MD m [GeV] RS Gravitons ADD (jj), nED=4, MS t1 RS1(jj), k=0.1 RS1(γγ), k=0.1 QBH, nED=6, MD=4 TeV RS1(ee,μμ), k=0.1 NR BH, nED=6, MD=4 TeV 0 1 2 3 4 TeV String Scale (jj) QBH (jj), nED=4, MD=4 TeV CMS Preliminary ADD (j+MET), nED=4, MD no sign of ADD (ee,μμ), nED=4, MS Large Extra Heavy Gauge ADD (γγ), nED=4, MS Dimensions SSM Z'(ττ) Jet Extinction Scale Bosons SSM Z'(jj) 0 1 2 3 4 5 6 7 8 9 10 new physics SSM Z'(ee)+Z'(µµ) TeV SSM W'(jj) dijets, Λ+ LL/RR SSM W'(lv) dijets, Λ- LL/RR SSM Z'(bb) dimuons, Λ+ LLIM that explains 0 1 2 3 4 5 TeV dimuons, Λ- LLIM dielectrons, Λ+ LLIM Excited dielectrons, Λ- LLIM e* (M=Λ) Fermions single e, Λ HnCM μ* (M=Λ) single μ, Λ HnCM Compositeness q* (qg) hierarchy problem! inclusive jets, Λ+ q* (qγ) f=1 b* inclusive jets, Λ- 0 1 2 3 4 5 6 TeV 0 1 2 3 4 5 6 7 8 9 1011121314151617181920TeV21 CMS Exotica Physics Group Summary – ICHEP, 2016! recent thinking recent thinking • dark matter definitely exists recent thinking • dark matter definitely exists • hierarchy problem may be optional? recent thinking • dark matter definitely exists • hierarchy problem may be optional? • need to explain dark matter on its own recent thinking • dark matter definitely exists • hierarchy problem may be optional? • need to explain dark matter on its own • perhaps we should decouple these two recent thinking • dark matter definitely exists • hierarchy problem may be optional? • need to explain dark matter on its own • perhaps we should decouple these two • do we really need big ideas like SUSY? recent thinking • dark matter definitely exists • hierarchy problem may be optional? • need to explain dark matter on its own • perhaps we should decouple these two • do we really need big ideas like SUSY? • perhaps we can solve it with ideas more familiar to us? mass [GeV] 1050 1040 1030 1020 1010 100 10–10 10–20 10–30 mass [GeV] 1050 etc mirolensing 1040 1030 1020 1010 100 10–10 10–20 10–30 mass [GeV] 1050 etc mirolensing 1040 1030 1020 1010 100 10–10 10–20 –30 10 to fluffy to mass [GeV] 1050 etc mirolensing 1040 1030 no good idea good no 1020 1010 100 10–10 10–20 –30 10 to fluffy to mass mass [GeV] [GeV] 1050 etc mirolensing 106 1040 1030 no good idea good no 1020 100 1010 100 10–10 10–20 –30 10–10 10 to fluffy to mass mass [GeV] [GeV] defects 1050 etc mirolensing 106 non-thermal 1040 30 10 WIMP asymmetric DM asymmetric no good idea good no 1020 100 1010 gravitino 100 sterile neutrino sterile 10–10 vector vector mediation 10–20 w/ moduli 10–30 10–10 to fluffy to axion QCD mass mass [GeV] [GeV] defects 1050 etc mirolensing 106 non-thermal 1040 30 10 WIMP asymmetric DM asymmetric no good idea good no 1020 100 SIMP 1010 gravitino 100 sterile neutrino sterile 10–10 vector vector mediation 10–20 w/ moduli 10–30 10–10 to fluffy to axion QCD Seminar in Berkeley Strongly Interacting Massive Particle (SIMP) Yonit Hochberg nDM 10 GeV =4.4 10− Miracles s ⇥ mDM DM SM ↵2 σ2 2v h ! i⇡m2 2 ↵ 10− ⇡ m 300 GeV DM SM ⇡ WIMP miracle! nDM 10 GeV =4.4 10− Miracles s ⇥ mDM DM SM ↵2 σ2 2v h ! i⇡m2 2 ↵ 10− ⇡ m 300 GeV DM SM ⇡ WIMP miracle! DM DM DM DM DM nDM 10 GeV =4.4 10− Miracles s ⇥ mDM DM SM ↵2 σ2 2v h ! i⇡m2 2 ↵ 10− ⇡ m 300 GeV DM SM ⇡ WIMP miracle! DM DM 3 2 ↵ σ3 2v h ! i⇡m5 DM ↵ 4⇡ ⇡ m 300MeV DM DM ⇡ nDM 10 GeV =4.4 10− Miracles s ⇥ mDM DM SM ↵2 σ2 2v h ! i⇡m2 2 ↵ 10− ⇡ m 300 GeV DM SM ⇡ WIMP miracle! DM DM 3 2 ↵ σ3 2v h ! i⇡m5 DM ↵ 4⇡ ⇡ m 300MeV DM DM ⇡ SIMP miracle! nDM 10 GeV =4.4 10− Miracles s ⇥ mDM DM SM ↵2 σ2 2v h ! i⇡m2 2 ↵ 10− ⇡ m 300 GeV DM SM ⇡ WIMP miracle! DM DM 3 2 ↵ σ3 2v h ! i⇡m5 DM ↵ 4⇡ Hochberg, Kuflik, ⇡ Volansky, Wacker m 300MeVarXiv:1402.5143 DM DM ⇡ SIMP miracle! LEE-WEINBERG FREEZE-OUT Back of the envelope calculation Γ H ann ' |freezeout T 2 H Γann ndm σv 2 2 ' Mpl ' h i ! ↵2 mdmndm mpnb σv ⇠ 2 2 2 h i ! ' mdm nb ⌘bs ⇠ Eric Kuflik ⌘ T /m s T 3 b ' eq p ' 2 2 Teq↵ mdm Γann 3 H 2 ' xF ' MplxF 3→2 LEE-WEINBERG FREEZE-OUT Back of the envelope calculation Γ H ann ' |freezeout T 2 H Γann ndm σv 2 2 ' Mpl ' h i ! ↵2 mdmndm mpnb σv ⇠ 2 2 2 h i ! ' mdm nb ⌘bs ⇠ Eric Kuflik ⌘ T /m s T 3 b ' eq p ' 2 2 Teq↵ mdm Γann 3 H 2 ' xF ' MplxF 3→2 LEE-WEINBERG FREEZE-OUT Back of the envelope calculation Γ H ann ' |freezeout T 2 2 2 H Γann ndm σv 3 2 ' Mpl ' h i ! ↵2 mdmndm mpnb σv ⇠ 2 2 2 h i ! ' mdm nb ⌘bs ⇠ Eric Kuflik ⌘ T /m s T 3 b ' eq p ' 2 2 Teq↵ mdm Γann 3 H 2 ' xF ' MplxF 3→2 LEE-WEINBERG FREEZE-OUT Back of the envelope calculation Γ H ann ' |freezeout T 2 2 2 H Γann ndm σv 3 2 ' Mpl ' h i ! 3 2 ↵ mdmndm mpnb σv ⇠ 3 2 5 h i ! ' mdm nb ⌘bs ⇠ Eric Kuflik ⌘ T /m s T 3 b ' eq p ' 2 2 Teq↵ mdm Γann 3 H 2 ' xF ' MplxF 3→2 LEE-WEINBERG FREEZE-OUT Back of the envelope calculation Γ H ann ' |freezeout T 2 2 2 H Γann ndm σv 3 2 ' Mpl ' h i ! 3 2 ↵ mdmndm mpnb σv ⇠ 3 2 5 h i ! ' mdm nb ⌘bs ⇠ Eric Kuflik ⌘ T /m s T 3 b ' eq p ' T 2 ↵3 m2 Γ eq H dm ann ' x4 m ' M x2 F ⇥ dm pl F nDM 10 GeV =4.4 10− SIMPlest Miracles ⇥ mDM • Not only the mass scale is similar to QCD DM DM • dynamics itself can be QCD! Miracle3 DM • DM = pions = qq¯ • e.g.
Recommended publications
  • UC Berkeley UC Berkeley Electronic Theses and Dissertations
    UC Berkeley UC Berkeley Electronic Theses and Dissertations Title Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It Permalink https://escholarship.org/uc/item/2sv8b4x5 Author Mcgehee Jr., Robert Stephen Publication Date 2020 Peer reviewed|Thesis/dissertation eScholarship.org Powered by the California Digital Library University of California Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It by Robert Stephen Mcgehee Jr. A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Physics in the Graduate Division of the University of California, Berkeley Committee in charge: Professor Hitoshi Murayama, Chair Professor Alexander Givental Professor Yasunori Nomura Summer 2020 Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It Copyright 2020 by Robert Stephen Mcgehee Jr. 1 Abstract Discoverable Matter: an Optimist’s View of Dark Matter and How to Find It by Robert Stephen Mcgehee Jr. Doctor of Philosophy in Physics University of California, Berkeley Professor Hitoshi Murayama, Chair An abundance of evidence from diverse cosmological times and scales demonstrates that 85% of the matter in the Universe is comprised of nonluminous, non-baryonic dark matter. Discovering its fundamental nature has become one of the greatest outstanding problems in modern science. Other persistent problems in physics have lingered for decades, among them the electroweak hierarchy and origin of the baryon asymmetry. Little is known about the solutions to these problems except that they must lie beyond the Standard Model. The first half of this dissertation explores dark matter models motivated by their solution to not only the dark matter conundrum but other issues such as electroweak naturalness and baryon asymmetry.
    [Show full text]
  • Table of Contents (Print)
    NEWSPAPER The PandaX-II liquid xenon detector used for dark matter searches at the China Jin-Ping Underground Laboratory. Selected for an Editors’ Suggestion. [Andi Tan et al. (PandaX-II Collaboration), Phys. Rev. Lett. 117, 121303 (2016)] PHYSICAL REVIEW LETTERS Contents Articles published 10 September–16 September 2016 VOLUME 117, NUMBER 12 16 September 2016 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. Direct Measurement of the Density Matrix of a Quantum System .................................................................... 120401 G. S. Thekkadath, L. Giner, Y. Chalich, M. J. Horton, J. Banker, and J. S. Lundeen Accessing Many-Body Localized States through the Generalized Gibbs Ensemble ........................................................... 120402 Stephen Inglis and Lode Pollet Noise Threshold and Resource Cost of Fault-Tolerant Quantum Computing with Majorana Fermions in Hybrid Systems ................................................................................................................................................................. 120403 Ying Li Quasiprobability Representations of Quantum Mechanics with Minimal Negativity .......................................................... 120404 Huangjun Zhu Grover Search and the No-Signaling Principle ..................................................................................................................... 120501 Ning Bao, Adam Bouland, and Stephen P. Jordan Gravitation and Astrophysics Observation of Noise Correlated by
    [Show full text]
  • Constraining a Thin Dark Matter Disk with Gaia
    LCTP 17-03, MIT-CTP 4957 Constraining a Thin Dark Matter Disk with Gaia Katelin Schutz,1, ∗ Tongyan Lin,1, 2, 3 Benjamin R. Safdi,4 and Chih-Liang Wu5 1Berkeley Center for Theoretical Physics, University of California, Berkeley, CA 94720, USA 2Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 3Department of Physics, University of California, San Diego, CA 92093, USA 4Leinweber Center for Theoretical Physics, Department of Physics, University of Michigan, Ann Arbor, MI 48109 5Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 If a component of the dark matter has dissipative interactions, it could collapse to form a thin dark disk in our Galaxy that is coplanar with the baryonic disk. It has been suggested that dark disks could explain a variety of observed phenomena, including periodic comet impacts. Using the first data release from the Gaia space observatory, we search for a dark disk via its effect on stellar kinematics in the Milky Way. Our new limits disfavor the presence of a thin dark matter disk, and we present updated measurements on the total matter density in the Solar neighborhood. Introduction.| The particle nature of dark matter height of hDD 10 pc are required to meaningfully im- (DM) remains a mystery in spite of its large abundance pact the above∼ phenomena.1 in our Universe. Moreover, some of the simplest DM Here we present a comprehensive search for a local DD, models are becoming increasingly untenable. Taken to- using tracer stars as a probe of the local gravitational po- gether, the wide variety of null searches for particle DM tential.
    [Show full text]
  • Cora Dvorkin Curriculum Vitae
    Cora Dvorkin 1 Cora Dvorkin Curriculum Vitae Contact Address: Department of Physics, Harvard University 17 Oxford Street, Lyman 334 Cambridge, MA 02138 Telephone (773) 915-3857 Email: [email protected] Website: http : ==dvorkin:physics:harvard:edu=Home:html https : ==www:physics:harvard:edu=people=facpages=dvorkin Citizenship: Argentina EDUCATION July, 2011: Doctor of Philosophy in Physics University of Chicago Dissertation: \On the Imprints of Inflation in the Cosmic Microwave Background" Advisor: Prof. Wayne Hu September, 2006: Master of Science in Physics University of Chicago June, 2005: Diploma in Physics (M.S. equivalent) University of Buenos Aires (Summa cum laude) RESEARCH INTERESTS I am a theoretical cosmologist. My areas of interest are: the nature of dark matter, neutrinos and other light relics, and the physics of the early universe. I use observables such as the Cosmic Microwave Background (CMB), the large-scale structure of the universe, 21-cm radiation, and strong gravitational lensing to shed light on these questions. POSITIONS HELD July, 2019 - present Department of Physics, Harvard University Associate Professor July, 2015 - June, 2019 Department of Physics, Harvard University Assistant Professor 2014-2015 ITC - Center for Astrophysics, Harvard University Hubble Fellow and ITC Fellow 2011-2014 Institute for Advanced Study (Princeton), School of Natural Sciences Postdoctoral Member 2006-2011 University of Chicago, Department of Physics Research Assistant at Kavli Institute for Cosmological Physics (KICP) 2004-2005
    [Show full text]
  • Signature Redacted Thesis Supervisor Certified By
    MASSACHUSETTS INSTMITE A Tale of Two Particles OF TECHNOLOGY by AU6 15 2014 Katelin Schutz LIBRARIES Submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Bachelor of Science in Physics at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY June 2014 @ Katelin Schutz, MMXIV. All rights reserved. The author hereby grants to MIT permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole or in part in any medium now known or hereafter created. Signature redacted Author .. .................................. Department of Physics Signature redacted May 9, 2014 Certified by. ........................... A. David Kaiser Germeshausen Professor of the History of Science Senior Lecturer, Department of Physics Signature redacted Thesis Supervisor Certified by.. ............................. Tracy Slatyer Assistant Professor of Physics Signature redacted Thesis Supervisor Accepted by.. ..................... Nergis Mavalvala Senior Thesis Coordinator A Tale of Two Particles by Katelin Schutz Submitted to the Department of Physics on May 9, 2014, in partial fulfillment of the requirements for the degree of Bachelor of Science in Physics Abstract It was the earliest of times, it was the latest of times, it was the age of inflation, it was the age of collapse, it was the epoch of perturbation growth, it was the epoch of perturbation damping, it was the CMB of light, it was the dwarf galaxy of dark- ness, it was the largest of cosmic scales, it was the smallest of Milky Way subhalos, we had multiple nonminimally coupled inflatons before us, we had inelastically self- interacting dark matter before us, we were all going direct to the Planck scale, we were all going direct the other way.
    [Show full text]
  • Electronic Newsletter December 15, 2016
    Electronic Newsletter December 15, 2016 In this issue • April Meeting (in January) Washington, DC • DAP Nominations • APS Fellows from DAP • 2017 Bethe Prize • April Meeting Overview • DAP Awards Ceremony • Public Lecture and Plenary Session Highlights • DAP Session Schedule • Focus Sessions sponsored by the DAP • Invited Session Highlights APS DAP Officers 2016–2017: Finalize your plans now to attend the April 2017 meeting held Chair: Julie McEnery this year in January in Washington, DC. A number of plenary and invited sessions will feature presentations by DAP mem- Chair-Elect: Fiona Harrison bers. Here are the key details: Vice Chair: Priyamvada Natarajan Past Chair: Paul Shapiro What: April 2017 APS Meeting Secretary/Treasurer: Scott Dodelson When: Saturday, Jan 28 – Tuesday, Jan 31, 2016 Deputy Sec./Treasurer: Where: Washington, DC (Marriott Wardman Park) Keivan Stassun Member-at-Large: Registration Deadline: January 6, 2017 Brenna Flaugher Division Councilor: The 2017 April Meeting will take place at the Marriott Ward- Miriam Forman man Park. Detailed information for the meeting, including details Member-at-Large: on registration and the scientific program can be found online at Daniel Kasen http://www.aps.org/meetings/april Member-at-Large: Marc Kamionkowski Note that you can still register on-site, if you don’t do so by the Member-at-Large: deadline. Tracy Slatyer Registration fees range from $30 for undergraduates to $480 for full members. Questions? Comments? Newsletter Editor: Keivan Stassun [email protected] Nominations for the APS DAP Executive Committee Officers Deadline: December 21, 2016 Each year the Division of Astrophysics (DAP) of the APS elects new members for the open positions on the DAP Executive Committee.
    [Show full text]
  • Reversed out (White) Reversed
    Berkeley rev.( white) Berkeley rev.( FALL 2014 reversed out (white) reversed IN THIS ISSUE Berkeley’s Space Sciences Laboratory Tabletop Physics Bringing More Women into Physics ALUMNI NEWS AND MORE! Cover: The MAVEN satellite mission uses instrumentation developed at UC Berkeley's Space Sciences Laboratory to explore the physics behind the loss of the Martian atmosphere. It’s a continuation of Berkeley astrophysicist Robert Lin’s pioneering work in solar physics. See p 7. photo credit: Lockheed Martin Physics at Berkeley 2014 Published annually by the Department of Physics Steven Boggs: Chair Anil More: Director of Administration Maria Hjelm: Director of Development, College of Letters and Science Devi Mathieu: Editor, Principal Writer Meg Coughlin: Design Additional assistance provided by Sarah Wittmer, Sylvie Mehner and Susan Houghton Department of Physics 366 LeConte Hall #7300 University of California, Berkeley Berkeley, CA 94720-7300 Copyright 2014 by The Regents of the University of California FEATURES 4 12 18 Berkeley’s Space Tabletop Physics Bringing More Women Sciences Laboratory BERKELEY THEORISTS INVENT into Physics NEW WAYS TO SEARCH FOR GOING ON SIX DECADES UC BERKELEY HOSTS THE 2014 NEW PHYSICS OF EDUCATION AND SPACE WEST COAST CONFERENCE EXPLORATION Berkeley theoretical physicists Ashvin FOR UNDERGRADUATE WOMEN Vishwanath and Surjeet Rajendran IN PHYSICS Since the Space Lab’s inception are developing new, small-scale in 1959, Berkeley physicists have Women physics students from low-energy approaches to questions played important roles in many California, Oregon, Washington, usually associated with large-scale of the nation’s space-based scientific Alaska, and Hawaii gathered on high-energy particle experiments.
    [Show full text]
  • Upcoming Events
    To view this email as a web page, go here. Upcoming Events Monday, October 12 4:00pm Physics Club. Sheldon Stone, Syracuse University, "Physics at LHCb" via zoom. Tuesday, October 13 12:00pm WIDG Seminar. Carl Rethmeier, Carleton University, "Measurement of Alpha-Decaying Backgrounds and the Search for 5.5 MeV Solar Axions in DEAP-3600" via zoom. 12:00pm Department of Chemistry Biophysical Seminar. Richard Cogdell, University of Glasgow, "Recent advances on the structure and function of purple bacterial light harvesting complexes" via zoom. 4:00pm DEIAP Town Hall. Karsten Heeger, Yale University, "Planning for DEI action" via zoom. Wednesday, October 14 3:30pm Earth and Planetary Science Colloquium. Daniel Ibarra, University of California Berkeley, "Drivers of warm and cold past wet states recorded by lakes in western North America" via zoom. 4:00pm Molecular, Cellular and Developmental Biology Seminar. Erin Carlson, University of Minnesota, "Chemical Microbiology: Translation and Control of Bacterial Behavior" via zoom. Hosted by Stavroula Hatzios. 4:00pm Department of Chemistry Organic Seminar. Jeff Chan, University of Illinois, "Expanding the Chemical Toolbox for Acoustic-based Imaging of Cancer" via zoom. 4:15pm Department of Mathematics Colloquium. Anna Gilbert, Yale University, "Title TBA" via zoom. Thursday, October 15 1:00pm NPA Seminar. Stefania Amodeo, Cornell, "Halo gas thermodynamics from the CMB: results from the Atacama Cosmology Telescope DR5" via zoom. 2:30pm Department of Astronomy Colloquium. Katelin Schutz, MIT Center for Theoretical Physics, "Making dark matter out of light: the cosmology of sub-MeV freeze-in" via zoom. Friday, October 16 4:00pm Yale Quantum Institute Open Mic.
    [Show full text]
  • Multifield Inflation After Planck: the Case for Nonminimal Couplings
    Multifield Inflation after Planck: The Case for Nonminimal Couplings David I. Kaiser and Evangelos I. Sfakianakis∗ Center for Theoretical Physics and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 USA (Dated: January 8, 2014) Multifield models of inflation with nonminimal couplings are in excellent agreement with the recent results from Planck. Across a broad range of couplings and initial conditions, such models evolve along an effectively single-field attractor solution and predict values of the primordial spectral index and its running, the tensor-to-scalar ratio, and non-Gaussianities squarely in the observationally most-favored region. Such models also can amplify isocurvature perturbations, which could account for the low power recently observed in the CMB power spectrum at low multipoles. Future measurements of primordial isocurvature perturbations could distinguish between the currently viable possibilities. PACS numbers: 04.62+v; 98.80.Cq. Published in Phys. Rev. Lett. 112 (2014): 011302. Early-universe inflation remains the leading framework for understanding a variety of features of our observable universe [1, 2]. Most impressive has been the prediction of pri- mordial quantum fluctuations that could seed large-scale structure. Recent measurements of the spectral tilt of primordial (scalar) perturbations, ns, find a decisive departure from arXiv:1304.0363v3 [astro-ph.CO] 7 Jan 2014 a scale-invariant spectrum [3, 4]. The Planck collaboration's value, ns = 0:9603 ± 0:0073, differs from ns = 1 by more than 5σ. At the same time, observations with Planck constrain the ratio of tensor-to-scalar perturbations to r < 0:11 (95% CL), and are consistent with the absence of primordial non-Gaussianities, fNL ∼ 0 [4, 5].
    [Show full text]
  • Letter of Interest Cosmic Probes of Dark Matter Interactions
    Snowmass2021 - Letter of Interest Cosmic Probes of Dark Matter Interactions: Challenges for Theory and Analysis Thematic Areas: (check all that apply /) (CF1) Dark Matter: Particle Like (CF2) Dark Matter: Wavelike (CF3) Dark Matter: Cosmic Probes (CF4) Dark Energy and Cosmic Acceleration: The Modern Universe (CF5) Dark Energy and Cosmic Acceleration: Cosmic Dawn and Before (CF6) Dark Energy and Cosmic Acceleration: Complementarity of Probes and New Facilities (CF7) Cosmic Probes of Fundamental Physics (TF09) Theory frontier/Astro-particle physics and Cosmology (TF08) Theory Frontier/BSM Model Building Contact Information: Vera Gluscevic (University of Southern California) [email protected] Kimberly K. Boddy (University of Texas at Austin) [email protected] Authors: (names and institutions) Vera Gluscevic (University of Southern California), Kimberly Boddy (UT Austin), Yacine Ali-Ha¨ımoud (New York University), Keith Bechtol (University of Wisconsin-Madison), Simon Birrer (Stanford Univer- sity), Torsten Bringmann (University of Oslo), Jens Chluba (University of Manchester), Djuna Croon (TRI- UMF), Francis-Yan Cyr-Racine (University of New Mexico), Caterina Doglioni (Lund University), Cora Dvorkin (Harvard University), Nicolas Fernandez (University of Illinois at Urbana-Champaign), Daniel Grin (Haverford College), Benjamin V. Lehmann (UC Santa Cruz), Julien Lesgourgues (RWTH Aachen University), Ethan Nadler (Stanford University), Julian B Munoz (Harvard-Smithsonian), Ashley Perko (University of Utah), Annika Peter
    [Show full text]
  • 2020 NHFP Fellows Symposium
    NASA's Hubble, Einstein and Sagan Fellowship programs have merged to form the NASA Hubble Fellowship Program (NHFP), continuing NASA’s pursuit of excellence in space science, through support of some of the field’s most creative and innovative recent PhD scientists. An important part of the NHFP is the annual Symposium, which provides current Hubble, Einstein and Sagan Fellows the opportunity to join together to discuss results of their research, to share results across all fields of NASA astrophysics, and to interact with the scientific and administrative staff who manage the program. The 2020 NHFP Symposium will be held as an all-virtual event September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
    [Show full text]
  • Arxiv:1611.06228V1 [Hep-Ph] 18 Nov 2016
    Light Dark Matter in Superfluid Helium: Detection with Multi-excitation Production Simon Knapen,1, 2 Tongyan Lin,1, 2 and Kathryn M. Zurek1, 2 1Theory Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94709 USA 2Berkeley Center for Theoretical Physics, University of California, Berkeley, CA 94709 USA (Dated: November 23, 2016) Abstract We examine in depth a recent proposal to utilize superfluid helium for direct detection of sub-MeV mass dark matter. For sub-keV recoil energies, nuclear scattering events in liquid helium primarily deposit energy into long-lived phonon and roton quasiparticle excitations. If the energy thresholds of the detector can be reduced to the meV scale, then dark matter as light as MeV can be reached ∼ with ordinary nuclear recoils. If, on the other hand, two or more quasiparticle excitations are directly produced in the dark matter interaction, the kinematics of the scattering allows sensitivity to dark matter as light as keV at the same energy resolution. We present in detail the theoretical framework ∼ for describing excitations in superfluid helium, using it to calculate the rate for the leading dark matter scattering interaction, where an off-shell phonon splits into two or more higher-momentum excitations. We validate our analytic results against the measured and simulated dynamic response of superfluid helium. Finally, we apply this formalism to the case of a kinetically mixed hidden photon in the superfluid, both with and without an external electric field to catalyze the processes. arXiv:1611.06228v1 [hep-ph] 18 Nov 2016 1 CONTENTS I Introduction2 II Theory of superfluid helium5 A Bijl-Feynman relation for single-excitations .
    [Show full text]