From Quarks to Nuclei to Compact Stars and Back Formulating nuclear physics from first principles Mannque Rho, Saclay.

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From Quarks to Nuclei to Compact Stars and Back Formulating nuclear physics from first principles Mannque Rho, Saclay

Weinberg ‘folk theorem’ “When you use quantum field theory to study low-energy phenomena, then according to the folk theorem, you're not really making any assumption that could be wrong, unless of course Lorentz invariance or quantum mechanics or cluster decomposition is wrong, provided you don't say specifically what the Lagrangian is. “What is quantum field theory, and what did we think it is?” hep-th/ (‘F-theorem’)

As long as you let it be the most general possible Lagrangian consistent with the symmetries of the theory, you're simply writing down the most general theory you could possibly write down.... “ “F-proof”: It’s hard to see how it can go wrong ‘F-theorem’ continued

“Effective field theory was first used in this way to calculate processes involving soft  mesons, that is,  mesons with energy less than about 2  F   1200 MeV. The use of effective quantum field theories has been extended more recently to nuclear physics where although nucleons are not soft they never get far from their mass shell, and for that reason can be also treated by similar methods as the soft pions. ‘F-Corollary’

Nuclear physicists have adopted this point of view, and I gather that they are happy about using this new language because it allows one to show in a fairly convincing way that what they've been doing all along is the correct first step in a consistent approximation scheme.” ‘F-Corollary’ continued

Outline 1970’s – 1980’s: Cheshire cat, confinement - deconfinement, MIT bag  Stony Brook “little bag”  skyrmions 1990’s: Weinberg “F-theorem”: quarks to hadrons to nuclei to dense/hot matter to neutron stars and black holes 2000’s: Holographic duality, back to Cheshire cat.

Objective of Fundamental Principles in Nuclear Physics Recover and sharpen the standard nuclear physics approach, put it in the framework of the Standard Model. Make precise predictions that play a key ingredient in other areas of science, e.g., solar evolution and neutrino mass. Quest for new states of matter created under extreme conditions

QCD is the First Principle

QCD Nucleon “Down” quark “Up” quark MIT Bag (1970’s) R ~ 1 fm

DEUTERON Do the bags of R  1 fm overlap?

Heavy Nucleus Grapefruits in the salad bowl !!!??? SIZE CRISIS? NEUTRON PROTON

Size Problem MIT bags pea soup in 208 Pb ? Spectroscopic Factor ~ single particleness But shell model Something amiss

A Way out Cheshire cat “Origin” of the proton mass

Alice in the wonderland   Cheshire Cat

Where does the mass come from? For Molecules, Atoms, Nuclei Constituents: protons, neutrons, electrons Masses = sum of masses of constituents + tiny binding energy Nuclear BE < 1%

A ‘ Mass ’ Problem Proton/Neutron Mass=938/940 MeV Constituents: Quarks and gluons Proton= uud ; Neutron= udd Sum of “current-quark” masses ≈ 10 MeV Where do ~ 99% of the mass come from?

QCD Answer “ Energy stored in the motion of the (nearly) massless quarks and energy in massless gluons that connect them” Proton mass ≈ 1 GeV “Mass without mass” Technically, “chiral symmetry spontaneously broken (SB)” QCD on lattice explains the proton mass within ~ 10%. F. Wilczek à la Nambu/Goldstone

Order Parameter Quark condensate : _ ≈ - (0.23±0.03 GeV) 3 → Proton mass ≈ 1 GeV Mass disappears when → 0 ? ≠ 0 S broken = 0 S restored _ _ Lattice QCD

Stony Brook “Little Bag” Shrink the bag to ~ 1/3 fm from ~ 1 fm How? SB  pions as (pseudo)Goldstone bosons          qqq Pion pressure + “Yukawa” G.E. Brown and MR 1979 ≠0 0 This reasoning was not quite correct!

Enter Cheshire Cat in Infinite Hotel Nadkarni, Nielsen and Zahed 1985  Bag radius (confinement radius) is a gauge (“redundant”) degree of freedom  Low-energy physics should not depend upon the bag or confinement size  R can be shrunk to zero  skyrmion Quarks/gluons “Smile of the Cheshire Cat”

Nambu/Goldstone (Pion) Cloud uud MIT SB MITbag SB little bagskyrmion“cloudy” bag SB & anomaly

MIT Stony Brook

Baryon Number B  skyrmionMIT bag total pion quark  Topological invariant

g A 0  “Proton spin” SBMIT Non-topological ~ dynamical

Nuclei as skyrmions Manton, Sutcliffe et al 2008 Classical, need to be quantized (in progess)

‘F-theorem’ applied to nuclei  (140), (770), (780), …, N (940) For E  m  (140)  m N (940) L N =N † (i  t +  2 /2M) N + c(N † N) 2 + … galilean invariance etc. “Pionless Lagrangian” For E ~ m   m N Local field L =  N +     N   (f   /4) Tr(  U  U † ) +… U=exp(2i/f   Relevant degrees of freedom: Low-mass hadrons Chiral invariance, Lorentz invariance..

Strategy Chiral Lagrangian  Pions play a crucial role à la Weinberg  Applicable for E < m  MeV  Match to highly sophisticated ‘standard nuclear physics approach’ refined since decades: Weinberg F-corollary “ … it allows one to show in a fairly convincing way that what they've been doing all along is the correct first step in a consistent approximation scheme” 1990 – 2000 : QCD to EFT of nuclei

How does it fare with Nature? Parameter free calculations accurate to better than 97%  Thermal n+p d+  th =334±2 mb (exp: 334.2±0.5 mb)   th ( 3 H) =3.035±0.013 (exp: 2.979±…..)  th ( 3 He)=-2.198±0.013 (exp: ±…..) Predictions: solar neutrinos   He   + 3 H  th =1499±16 Hz (exp: 1496±4 Hz)

Solar Neutrino Spectrum pp hep

S-factor in MeV-b unit ’52 (Salpeter) 630 Single particle model ’67 (Werntz) 3.7 Symmetry group consideration ’73 (Werntz) 8.1 Better wave functions (P-wave) ’83 (Tegner) 4  25 D-state & MEC ’89 (Wolfs) 15.3  4.7 Analogy to 3 He+n ’91 (Wervelman) 57 3 He+n with shell-model ’91 (Carlson et al.) 1.3 VMC with Av14 ’92 (Schiavilla et al.) VMC with Av28 (N+  ) ’01 (Marcucci et al.) 9.64 CHH with Av18 (N+  ) + p-wave Tortuous History of hep Theory Serious wave “function overlap” problem

“The most important unsolved problem in theoretical nuclear physics related to solar neutrinos is the range of values allowed by fundamental physics for the hep production cross section” J. Bahcall, hep-ex/ Bahcall’s challenge to nuclear physics

Predictions Solar neutrino processes  p+p  d+e + + e S pp =3.94x(1±0.0025) x MeV-b  p+ 3 He  4 He+e + + e S hep =(8.6±1.3) x keV-b Awaits experiment! T.S. Park et al, 2001

Matter under extreme conditions Quest for new states of matter – New physics

‘Phase diagram’

What happens as  0? - One possibility is that other light degrees of freedom than the pions start figuring

Hidden/emergent gauge symmetries  At very low energies, only pions figure L =(f  2 /4)Tr[    U   U † ] + … Nucleons emerge as skyrmions “Current algebra”  As energy increases, exploit “gauge symmetry” Vector mesons ’, …, ’, …figure with dropping masses à la Brown-Rho Nucleons emerge as instantons or skyrions U=exp(2i/f  )  SU(N) L xSU(N) R /SU(N) V=L+R

Gauge symmetry is a redundancy Famous case: charge-spin separation of electron e(x) ≡ electron, f(x) ≡ “new electron,” b(x) ≡ “boson”  Invariance:  Endow with a gauge field: “emergent” gauge filed

Emerging and   Invariance under  “Emergent” SU(N) gauge fields Excitation energy  m  ~ 800 MeV Bando et al 1986 Harada & Yamawaki 2003 What we are concerned with

Emerging “infinite tower” of vectors ’…, ’…, a 1 …  5-Dimensionally deconstructed QCD (?)(Son & Stephanov 04) This form descends ALSO from string theory! Harada-Yamawaki theory is a truncated HLS theory at the lowest vector mesons 

Matching HLS to QCD “matching scale” QCD (quarks, gluons) EFT (pions, vector mesons …) n n c T T c “Vector manifestation (VM)” fixed point Masayasu Harada & Koichi Yamawaki Phys. Rep. 381 (2003) (T,n) Wilsonian renormalization group flow

Vector Manifestation “VM fixed point” All light-quark hadrons lose mass at the VM point “VM (or BR) scaling” In the chiral limit

VM scaling in nuclei? Dropping mass tagged to Precursor in nuclear structure -  Warburton ratio  carbon-14 dating  others

Warburton Ratio Found large enhancement in heavy nuclei E. Warburton 91 Warburton defined/measured in nuclei for the weak axial-charge transition

n0n0 In units of m  3 A Exp ± ± ± ±0.10 n 0 /2 Prediction BR scaling

Carbon-14 dating Holt et al 2008 Tensor force fine-tuned by BR scaling!

Hadronic matter at high temperature and/or density

Large efforts in heavy-ion collisions at CERN and RHIC But no smoking gun signal yet Relegate to the future

Compact stars and Black Holes High Density Regime Questions:  What happens as density increases to that of compact stars?  Does hadronic physics matter for the collapse of stars?  Are the plethora of high density matter observable? Assertion:  The first – and possibly last (?) – phase change is that kaons condense at relatively low density

Kaons condense in compact stars mK*mK* ee e - → K - + density M Dropping mass “restores” SU(3) symmetry m  ~ 0, m K ~ 1/2 GeV Kaons condense

Consequences A scenario proposed i.A lot of light-mass black holes in the Universe ii.“BH-Nothingness” after kaon condensation

Bethe-Brown Mass “Stars more massive than M max BB ≈ 1.6 M  collapse into black holes” What to do? Why? Because such massive stars have condensed kaons which soften the EOS and trigger instability. a) “Find a compact star with mass M > M max BB ” b) “Find binary pulsars with mass difference > 4%” If found, the following will be invalidated a) Maximization of black holes in the Universe b) Mechanism for “Cosmological Natural Selection” c) Kaon condensation, VM, “hadronic freedom” “No proof. It’s a conjecture to be checked by nature.”

J Nice et al 2005 Observation in neutron star–white dwarf binary of 2.2±0.2 m  led to pitched activities  strong repulsive N-nucleon forces (with N≥ 3)  crystalline color-superconducting stars  etc etc producing ~ one paper a week This would unambiguously “kill” the BB conjecture But (!) new analysis in 2007 corrects the 2005 value to /-0.12!! BB still OK!

Summary  We went to skyrmions from quarks  We went to nuclei via skyrmions via F-theorem  We went to compact stars via nuclear matter via hidden local symmetry  Enter string theory: Sakai and Sugimoto showed (2005) that hadrons at low energy E < M KK could be described by the 5D action top-down from AdS/CFT: Arises also bottom-up from current algebra by “deconstruction”

Back to Cheshire Cat Nucleon is an instanton in 5D≈ a skyrmion in 4D In the infinite tower of vector mesons EM form factors Numerically “Dipole” “Monopole” Close to nature!! Hong, Yee, Yi, R 2007; Hashimoto, Sakai, Sugimoto 2008 Kim & Zahed 2008 First confirmation of Sakurai’s 1960’s idea of VD

Implications on Heavy ions Compact stars ? Future

Thanks for the attention!