WHEPP XI

COSMOLOGY AND ASTROPARTICLE PHYSICS WORKING GROUP (WG 1)


Talks at WHEPP XI are available at http://www.prl.res.in/~nmahajan .

Summary Report of WG1 Activities

PROBLEMS AND RELEVANT REFERENCE MATERIAL

Coordinator for the problem is also indicated in italics.



1.    Bosonic dark matter and Sommerfeld enhancement

           

2.  Scale of clumping of dark matter in local halo needed to explain PAMELA, etc. and how one may detect these clumps using gravitational lensing.

        

        Papers relevant to the above two topics are at (SPIRES search of Lattanzi and Silk)

   http://www.slac.stanford.edu/spires/find/hep/www?rawcmd=au+lattanzi+and+au+silk&FORMAT=WWW&SEQUENCE=

         Additional papers are http://arXiv.org/abs/0909.1878 and http://arXiv.org/abs/0909.5713


           Arjun Berera for 1 and 2


3.     No dark matter halo around elliptic galaxies (search if any dark matter is there using gravitational lensing)

           http://arxiv.org/abs/astro-ph/0308518

       Ajit Srivastava


4.  Universal values of   rho r_c in galaxies for both dark and luminous matter.  Explanation in MOND.

        Paper by Donato et al for dm http://arxiv.org/abs/0904.4054

          Paper by Gentile et al for luminous matter  http://arxiv.org/abs/0909.5203

            MOND explanation by Milgrom http://arxiv.org/abs/0909.5184

                                                                  http://www.astro.umd.edu/~ssm/mond/moti_bullet.htm

            Check Wikipedia pages for Bullet Cluster and MOND

                Also see http://arxiv.org/abs/0911.1774


         Raghu Rangarajan




5.    Bulk annihilation of dark matter in models with non-universal gaugino masses



6.    Removing infrared divergences in inflationary models  using an earlier radiation dominated era

        i) for the graviton propagator

       ii) using a thermal initial state for the inflaton


          Removing infrared divergences:
          Durrer et al criticism of Agullo et al (adiabatic subtraction at horizon exit) http://arxiv.org/abs/0906.4772
          Janssen and Prokopec study of a massless scalar http://arxiv.org/abs/0906.0666
          Urakawa and Tanaka http://arxiv.org/abs/0904.4415

       Thermal initial state for the inflaton: 

        Bhattacharya, Mohanty, and Rangarajan http://arxiv.org/abs/hep-ph/0508070
        Bhattacharya, Mohanty, and Nautiyal http://arxiv.org/abs/astro-ph/0607049


6.1  Removing infrared divergences in inflationary models using a compact space

           1.Massless minimally coupled Scalar field in de sitter space by Allen Folacci 1987:
                                       http://prd.aps.org/pdf/PRD/v35/i12/p3771_1
           2.Particla creation in in de sitter space by E.Mottola
                             http://prd.aps.org/pdf/PRD/v31/i4/p754_1
          3.Imprint of spatial curvature on inflation power spectrum by Eduard Masso,Subhendra Mohanty, Akhilesh Nautiyal and Gabriel Zsembinszki
                           http://prd.aps.org/pdf/PRD/v78/i4/e043534
           4.Inflation in an open universe by Ratra and Peebles
                            http://prd.aps.org/abstract/PRD/v52/i4/p1837_1



       Tomislav Prokopec for 6 and 6.1


7.    Effect of quantum corrections on the non-gaussian parameter f_NL, and the 1-loop effective potential

           Non-gaussianity http://arxiv.org/abs/0811.4092

           


8.    Inflation model building in SUGRA

           http://arxiv.org/abs/0907.1311  http://arxiv.org/abs/0806.4364  http://arxiv.org/abs/0801.2116   http://arxiv.org/abs/0712.3460

        Mar Bastero-Gil


9.  Supersonic bubble wall dynamics at the electroweak phase transition or

     Understanding when bubbles become supersonic

       Bodekar and Moore  http://arxiv.org/abs/0903.4099
       Moore and Prokopec        http://arxiv.org/abs/hep-ph/9506475  http://arxiv.org/abs/hep-ph/9503296
       Megavand and Sanchez http://arxiv.org/abs/0908.3663

     and Phase transition dynamics in NMSSM

     Anjishnu Sarkar


10.  Baryogenesis in composite Higgs model

          

                 Cline et al (in eqm, obtain effective potential) http://arxiv.org/abs/0808.1512

                 Carena et al (in technicolour model) http://arxiv.org/abs/0809.3760

        This paper has the inflaton as a composite particle (may be useful to understand spectral function, etc.)  http://arxiv.org/abs/0807.0954

          Suratna Das


11.   Non-perturbative CP violation in the Standard Model and Cold Electroweak Baryogenesis

                Tranberg et al (non-perturbative CP violation and cold electroweak baryogenesis)  http://arxiv.org/abs/0909.4199

                Hernandez et al (non-perturbative CP violation) http://arxiv.org/abs/0810.4092


             Ambresh Shivaji

 
12.  Higgs as an inflaton


Bezrukov and Shaposhnikov's original paper http://arxiv.org/abs/0710.3755

Bezrukov et al http://arxiv.org/abs/0812.3622 (reheating the Universe in the electroweak theory where the Higgs field plays a role of the inflaton)

http://arxiv.org/abs/0904.1537 (2 loop calculation)

http://arxiv.org/abs/0812.4905
http://arxiv.org/abs/0912.2718
http://arxiv.org/abs/0912.4348

http://arxiv.org/abs/hep-th/0009053
http://arxiv.org/abs/0709.4396

        Kaushik Datta

13. Cosmological constraints on interacting (with neutrinos) dark energy models


14. Including the kinetic energy term for interacting (with neutrinos) dark energy models

           Keum for 13 and 14


15. Parametric resonance for photon production due to coherent axion oscillations in the universe and reverse (oscillating B field to induce axion production in lab)

            Abbott and Sikivie PLB 120 (1983) 133

            Experimental techniques to search for the axion

       Raghu Rangarajan

16.  Resonant leptogenesis in Schwinger-Keldysh formalism

        Paper by Koksma, Prokopec and Schmidt  http://arxiv.org/abs/0910.5733

       This paper has a comparison of different resonant leptogenesis papers uptil 1999 http://arxiv.org/abs/hep-ph/9908417

         Kaushik Bhattacharya

Topics related to violation of statistical isotropy of the universe (Pankaj Jain)


17. Constraints on different proposals due to B mode


18. Constraints on different proposals due to high z supernovae


19. Bias at low l in the WMAP analysis


20. Construct foreground which gives observed anisotropy of higher modes  with axis towards VIRGO


Papers for the above are in the following site:  Isotropy