From paolo.pani at uniroma1.it  Sat Jan 23 18:22:51 2021
From: paolo.pani at uniroma1.it (Paolo Pani)
Date: Sat, 23 Jan 2021 18:22:51 +0100
Subject: [astroseminar@Sapienza] Gravity theory webinar Mon Jan 25th:
 Katsuki Aoki (Yakawa Institute) "Non-linearly ghost-free higher curvature
 gravity"
Message-ID: <CADjeKwBB77AUrr=090WQBDt7h4Vq6AYKm8Or5nWzxCygaLDsMg@mail.gmail.com>

Announcement of the next gravity-theory webinar:

*Katsuki Aoki* (Yukawa Institute for Theoretical Physics, Kyoto University)
*Monday, Jan 25th, h11:00am*

Title: *Non-linearly ghost-free higher curvature gravity*

Abstract: We find unitary and local theories of higher curvature gravity in
the vielbein formalism, known as the Poincar? gauge theory by utilizing the
equivalence to the ghost-free massive bigravity. We especially focus on
three and four dimensions but extensions into a higher dimensional
spacetime are straightforward. In three dimensions, a quadratic gravity
L=R+T^2+R^2, where R is the curvature and T is the torsion with indices
omitted, is shown to be equivalent to zwei-dreibein gravity and free from
the ghost at fully non-linear orders. In a special limit, new massive
gravity is recovered. When the model is applied to the AdS/CFT
correspondence, unitarity both in the bulk theory and in the boundary
theory implies that the torsion must not vanish. On the other hand, in four
dimensions, the absence of ghost at non-linear orders requires an infinite
number of higher curvature terms, and these terms can be given by a
schematic form R/(1+R/alpha m^2)R where m is the mass of the massive spin-2
mode originating from the higher curvature terms and alpha is an additional
parameter that determines the amplitude of the torsion. We also provide
another four-dimensional ghost-free higher curvature theory that contains a
massive spin-0 mode as well as the massive spin-2 mode.


Zoom link:
https://uniroma1.zoom.us/j/81283707469?pwd=SzkyMk5jRm0xcEN3WE5MYVh1RVFtQT09
ID meeting: 812 8370 7469
Passcode: 915450

List of the next gravity-theory webinars (calendar available here:
https://calendar.google.com/calendar/u/1?cid=Y191MGo3bG9pYzE1bjBxdGFhN3A4MTlzNDg2Y0Bncm91cC5jYWxlbmRhci5nb29nbGUuY29t
)

08/02/2021 h12:00   Jonas P. Pereira (Nicolaus Copernicus Astronomical
Center, Warsaw PL):  "Probing elastic quark phases in hybrid stars"
15/03/2021 h12:00   Danny Laghi & Gregorio Carullo (Pisa University, IT):
                                  "TBA"
24/03/2021 h16:00   William East (Perimeter Institute, CAN):
                                          "Black-hole mergers in
Einstein-scalar-Gauss-Bonnet gravity"
14/04/2021 h16:00   Jorge Rocha (ISCTE, PT):
                                               "Recent developments toward
the resolution of the information-loss paradox"

Cheers,
Paolo


-- 
Paolo Pani
Associate Professor
ERC StG Fellow, DarkGRA project
Junior Fellow, Scuola Superiore di Studi Avanzati Sapienza

Physics Department (Marconi Building), 3rd floor, room 334
Sapienza University of Rome
Piazzale Aldo Moro 5 - 00185 Rome (Italy)
+39 06 4991 4472 (int 24472)

-- 
________________________________________________________
Le informazioni 
contenute in questo messaggio di posta elettronica sono strettamente 
riservate e indirizzate esclusivamente al destinatario. Si prega di non 
leggere, fare copia, inoltrare a terzi o conservare tale messaggio se non 
si ? il legittimo destinatario dello stesso. Qualora tale messaggio sia 
stato ricevuto per errore, si prega di restituirlo al mittente e di 
cancellarlo permanentemente dal proprio computer.
The information contained 
in this e mail message is strictly confidential and intended for the use of 
the addressee only.? If you are not the intended recipient, please do not 
read, copy, forward or store it on your computer. If you have received the 
message in error, please forward it back to the sender and delete it 
permanently from your computer system.

-- 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists2.roma1.infn.it/pipermail/astroseminar/attachments/20210123/2e8ad1c6/attachment.html 

From raffaella.schneider at roma1.infn.it  Mon Jan 25 23:48:45 2021
From: raffaella.schneider at roma1.infn.it (raffaella.schneider at roma1.infn.it)
Date: Mon, 25 Jan 2021 23:48:45 +0100
Subject: [astroseminar@Sapienza] Quid Ultra? Frontiers and Controversies in
	Astrophysics
Message-ID: <014A591E-2953-429C-B4C5-1776B6DA2174@roma1.infn.it>

Dear colleagues,

we are pleased to announce the program QUID ULTRA? Frontiers and Controversies in Astrophysics, a series of monthly 
prestigious colloquia that will be running from early February till December 2021.

This initiative has been funded by Sapienza University with the co-sponsorship of INAF/Astronomical Observatory 
of Rome and of the joint PhD program in Astronomy, Astrophysics and Space Science of Sapienza, Tor Vergata University and INAF.

Due to the pandemic situation, the first 6 colloquia will be held online via zoom. The scientific program and all the information on how to attend the meeting
can be found on the project website: www.quidultra.it. 

Our first colloquium will be on February 2 2021 at 16:00 by Cecilia Ceccarelli (Universit? Grenoble Alpes, IPAG). 

Title: 
The astrochemical trail of our origin

Abstract:
The Solar System was born 4.5 billions years ago, after a complex process whose details are not fully understood. The large number of detected extrasolar planets tells us that they are a common product of the star formation process, their variety that there are many ways of building them. How can then we recover the path followed by the Solar System?
Understanding the Solar-type star formation process currently taking place in the Milky Way is mandatory to answer this question. Astrochemistry, the science of how atoms and molecules combine  and evolve in the interstellar medium, is a powerful diagnostics to follow the evolution that turns a molecular cloud dense clump into a planetary system. But it can only be exploited once we know how to interpret the chemistry occurring in the exotic conditions of the interstellar medium, where quantum chemical effects dominate.
In this presentation, I will provide an overview of the major progresses of our understanding in astrochemistry and, more specifically, the one involved in the Solar System formation history.


Looking forward to seeing you soon, 

Raffaella Schneider (on behalf of the SOC)


Prof. Raffaella Schneider
Dipartimento di Fisica "G. Marconi?
Senior Fellow, Scuola Superiore di Studi Avanzati Sapienza
Sapienza, Universit? di Roma
P.le A. Moro 2, 00185 Roma, Italy
raffaella.schneider at roma1.infn.it
Phone: +39 06 4991 4312
Skype: raffasch
https://uniroma1.zoom.us/j/87698584443?








-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists2.roma1.infn.it/pipermail/astroseminar/attachments/20210125/3ae0a3b4/attachment.html 

From elenia.pacetti at inaf.it  Thu Jan 28 11:37:09 2021
From: elenia.pacetti at inaf.it (elenia.pacetti at inaf.it)
Date: Thu, 28 Jan 2021 10:37:09 +0000
Subject: [astroseminar@Sapienza] Invito: Quid Ultra? Frontiers and
 Controv... - mar 2 feb 2021 4PM - 5PM (CET) (astroseminar@roma1.infn.it)
Message-ID: <00000000000043d6aa05b9f37890@google.com>

Sei stato invitato al seguente evento.

Titolo: [astroseminar at Sapienza] Quid Ultra? Frontiers and Controversies in  
Astrophysics
Quando: mar 2 feb 2021 4PM ? 5PM Ora dell?Europa centrale - Roma
Calendario: astroseminar at roma1.infn.it
Chi:
     * elenia.pacetti at inaf.it - organizzatore
     * raffaella.schneider at roma1.infn.it
     * astroseminar at roma1.infn.it

Dettagli evento:  
https://calendar.google.com/calendar/event?action=VIEW&eid=XzZjcjY4bzlwNmNwM2VjcjVjNHNqOG9oaTYwc2o0cGozY2tvajJjMzNja3M2YW9qM2M0cTAgYXN0cm9zZW1pbmFyQHJvbWExLmluZm4uaXQ&tok=MjIjZWxlbmlhLnBhY2V0dGlAaW5hZi5pdGMxNmZmNGE4YzAyYzBiMGM2ODc5MDI0NzllMGQ3OGIzNzBkZGE3MTY&ctz=Europe%2FRome&hl=it&es=0

Invito da Google Calendar: https://calendar.google.com/calendar/

Hai ricevuto questo messaggio email di cortesia all'account  
astroseminar at roma1.infn.it perch? sei uno dei partecipanti a questo evento.

Per disattivare la ricezione di aggiornamenti futuri per questo evento,  
rifiuta l'evento. In alternativa, puoi registrarti per un Account Google in  
https://calendar.google.com/calendar/ e verificare le impostazioni di  
notifica per l'intero calendario.

Se inoltri questo invito potresti consentire al destinatario di inviare una  
risposta all'organizzatore e di essere aggiunto all'elenco degli invitati  
oppure di invitare altre persone indipendentemente dallo stato dell'invito  
o ancora di modificare la tua risposta. Ulteriori informazioni  
all'indirizzo https://support.google.com/calendar/answer/37135#forwarding
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists2.roma1.infn.it/pipermail/astroseminar/attachments/20210128/0226a1d4/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/calendar
Size: 1574 bytes
Desc: not available
Url : http://lists2.roma1.infn.it/pipermail/astroseminar/attachments/20210128/0226a1d4/attachment.bin 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: invite.ics
Type: application/ics
Size: 1614 bytes
Desc: not available
Url : http://lists2.roma1.infn.it/pipermail/astroseminar/attachments/20210128/0226a1d4/attachment-0001.bin 

