B-Factories
General Information:
Members of this line participate in the BaBar experiment at SLAC (Stanford Linear Accelerator
Center, USA). The BaBar experiment is an international collaboration formed in 1993, of about
500 physicists and engineers of 74 institutions in 11 different countries
(http://www.slac.stanford.edu/). Since the first beam collisions in 1999 to the end of the data
taking in April 2008, BaBar has collected 500 million B pairs and even more of lighter flavor
particles. The main goal of the experiment has been to perform a complete study of CP
violation in the system of B mesons. In July 2001 BaBar established the first evidence of CP
violation in the B meson system [Phys. Rev. Lett. 87, 091801 (2001)]. The first observation of
direct CP violation in B0K+π- decays was announced in August 2004 [Phys. Rev. Lett. 93,
131801 (2004)]. Many other measurements concerning B mesons, charm and tau pairs have
also been performed. New charm and exotic particles have been discovered [Phys. Rev. D 69,
031101 (2004)], Phys. Rev. Lett. 95, 142001 (2005)] and in March 2007 BaBar for the first time
gave the first evidence of the mixing of the D-mesons [Phys.Rev.Lett.98:211802,2007].
Recently, in July 2008, BaBar announced the observation of the extensively searched
bottomonium ground state B(1S) [arxiv:hep-ex/0807.108]. The BaBar IFIC group was
constituted in September 2004 with Fernando Martinez-Vidal as project leader. It is currently
formed by 5 members (one professor, 2 postdocs and 2 Ph.D. students) and is performing
important contributions to the BaBar analyisis core program. This group is also getting involved
in the new generation of B-Factories: the SuperB project (http://www.pi.infn.it/SuperB/).
1 The BaBar detector at SLAC.
2 Upsilon(4S) decay to a B-meson and its
antiparticle detected by BaBar.
Present situation:
-
Personal:
Fernando Martínez-Vidal
Maria Aranzazu Oyanguren Campos
Virginia Azzolini
Diego Alejandro Milanés (PhD)
Neus Lopez-March (PhD)
-
Financiación:
Publicaciones:
Transferencia de conocimiento:
Formación:
Divulgación:
Internalización:
Otros Datos:
Análisis crítico, DAFO y AR
-
Análisis DAFO: [SWOT= Strengths, Weaknesses, Opportunities and Threats]
(Strengths)
One of the strengths of this line is the mastery of performing data analysis in different
experimental environments, such as hadron and electron colliders operating at several
energies. Members of the line working in the DELPHI, BaBar and CDF collaborations
have presented precise results of great impact in the community (see list of
publications). In the last five years important measurements as the J/psi meson and bhadron production cross sections [Phys.Rev.D71:032001,2005] (274 cites), the ttbar
production cross section [Phys.Rev.D71:052003,2005] (127 cites) the observation of B
oscillations by CDF [Phys.Rev.Lett.97:242003,2006] (215), and the observation of the
new massive particle Y(4260) [Phys.Rev.Lett.95:142001, 2005.] (180 cites) by BaBar,
the search for lepton flavor violation [Phys.Rev.Lett.95:041802,2005] at BaBar (102
cites) or the evidence of the D mixing [Phys.Rev.Lett.98:211802,2007] (94 cites)
manifest the significant impact of this line activity in the scientific community. This
expertise is crucial for the analysis performed with the data acquired by the new
detectors ( @ LHC, SuperB and ILC).
The line has an important background on B-Physics. Measurements at DELPHI of mb
[Eur.Phys.J.C55:525-538,2008, Eur.Phys.J.C46:569-583,2006, and references therein],
Rb
[Eur.Phys.J.C10:415-442,1999
and
references
therein]
and
|Vcb|
[Eur.Phys.J.C33:213-232,2004., Eur.Phys.J.C45:35-59,2006 and references therein], and
the large contribution to BaBar measurements (studies of CP, T and CPT violation in B
decays [Phys.Rev.Lett.92,181801,2004, Phys.Rev.D70,012007,2004], the measurement
of the CKM angle  [Phys.Rev.Lett.95,121802,2005, Phys.Rev.Lett.98:211802,2007]
and |Vub| [Phys Rev. D.72, 051102,2005, Phys. Rev. Lett. 95, 111801,2005]…) are
proof of the competence in this subject, and an evident strength for a strong activity in
the future B-Factory facilities.
Additionally, the line has expertise on vertex detectors: it is involved in RD,
construction and particle reconstruction (see Carlos part). In particular the BaBar-IFIC
group has taken responsibilities of the Silicon Vertex Detector (SVT) at SLAC, in
commissioning tasks and contributing to the improvement of the pattern recognition
for track reconstruction. The competence of the line in this subject is decisive for a
significant participation in the construction of the next generation of B-Factories
(SuperB and SuperBelle).
An important strength of the line comes from the increasing interaction and common
scientific interests with the IFIC theoretical lines 6 and 7 (High Energy Physic
Phenomenology and QCD and Strong Interactions). Common publications as
arXiv:0709.0451 [hep-ex] is an example of this strength.
The line has established strong and solid cooperation with different groups in several
countries which are involved in the same experiments. It is also important to note the
local participation of the IFIC members at the experiments (detector commissioning at
CERN and at SLAC, staff people placed at CERN, etc…).
(Weakness)
The main weakness of the line is at present the poor approach by CSIC researchers to
university students and the lack of initiatives to interact with them. It becomes
necessary then to drive new schemes to present in the university the work of the
different research groups involved in the line. The consequent threat following this is a
present lack of new phD students for the incoming period.
(Oportunities)
The line has important opportunities in the next years in many aspects. The LHC has
just started to take data promising new phenomena to be discovered. The BaBar and
CDF experiments are in the ultimate period of data taking and analysis with the full
statistics which can provide new and unexpected results. In particular, BaBar has
collected a total of 531 fb-1. Measurements of the CKM angle  and the D mixing
parameter performed with the full statistics are expected to reach precisions of 15
and less than 0.3% respectively.
On the other hand, a new generation of accelerators and detectors are starting to be
built. The line is involved in the ILC, SuperB Factories and SuperLHC international
Collaborations which are expected to have a large activity in the forthcoming years.
Concerning B-Factories, a new project for the construction of a Super Flavour Factory
SuperB has been developed [SuperB CDR, arXiv:0709.0451 [hep-ex]].
This new facility will be decisive for the search and the study of New Physics beyond
the Standard Model. Any new physics model established at the energy scale of the LHC
in the next years to solve the hierarchy problem of interactions includes new flavoured
particles. Since those new particles must couple to the Standard Model particles, the
New Physics cannot be flavour blind, and flavour observables must be affected. It is
also entirely possible that the masses of the new particles may be out of the reach of
the LHC. In this case only a high luminosity flavour factory would see the effects in
flavour observables. The SuperB factory, with an antisymmetric e+-e- accelerator of
polarized beams operating at the energy of the (4S) (with the possibility of operating
at smaller energies), will reach an unprecedented integrated luminosity of 75 ab-1 in 5
years of operation. The physics program with this integrated luminosity is huge and
complementary to any LHC result. Key measurements are related to observables which
are exactly predicted by the Standard Model or have a very small uncertainty since
they will provide a clear evidence of New Physics: flavor-violating  decays, direct CP
asymmetries in
, in  decays and in some non-leptonic D decays, CP
violation in neutral charm meson mixing, lepton universality violating B and  decays,
etc… Any small deviation from the Standard Model will be a measurement of New
Physics. Many other observables will reach an unprecedented precision in the flavor
sector (CKM matrix elements, angles and sides of the Unitary Triangle, mixing
parameters in charm decays,  magnetic dipole moment…) [arXiv:0802.3201 [hep-ph]]
in addition to many other possible measurements coming from the LHC discoveries.
(threats)
The main threat for this line in the incoming years is the potential lack of manpower
(temporal and permanent). Since the line is involved in several running and in
construction experiments, and has a strong program in detector R+D, it is difficult to
expect other latent important threat. One unlikely possibility would be caused by the
non discovery at LHC of any new particle. Even in this case, the 2010-1013 years will be
an intensive period of searches at LHC, at the same time that a new SuperB machine,
capable to observe heavier new particles, is being built.
-
Análisis relacional:
Centros Colaboradores:
1) Institute: INFN SEZIONE DI PISA
Institution: INFN
Project leaders: Marcello Giorgi (Marcello.Giorgi@pi.infn.it), Alberto Lusiani
(Alberto.Lusiani@pi.infn.it)
Address: Istituto Nazionale di Fisica Nucleare
Largo Pontecorvo, 3
56127 Pisa, Italy
Web: http://www.pi.infn.it/
2) Institute: LAL, ORSAY
Institution: IN2P3-CNRS et Universite Paris-Sud 11
Project leader: Achille Stocchi (stocchi@lal.in2p3.fr)
Address: Laboratoire de l'Accelerateur Lineaire
Centre Scientifique d'Orsay, B.P. 34
91898 Orsay Cedex, France
Web: http://www.lal.in2p3.fr/
Common publications:
1) Evidence for D0-anti-D0 Mixing.
By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-12385, BABAR-PUB-07-019, Mar 2007.
7pp.
Published in Phys.Rev.Lett.98:211802,2007.
e-Print: hep-ex/0703020 (cites: 94)
2) Improved measurement of the CKM angle gamma in B-+ ---> D(*) K(*)-+ decays with a
Dalitz plot analysis of D decays to K0(S) pi+ pi- and K0(S) K+ K-.
By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-13209, BABAR-PUB-08-006, Apr 2008.
22pp.
Published in Phys.Rev.D78:034023,2008.
e-Print: arXiv:0804.2089 [hep-ex] (cites: 4)
3) Measurement of gamma in B-+ --> D(*) K-+ decays with a Dalitz analysis of D ---> K0(s) pipi+.
By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-11127, Apr 2005. 7pp.
Published in Phys.Rev.Lett.95:121802,2005.
e-Print: hep-ex/0504039 (cites: 67)
4) Measurement of the hadronic form-factor in D0 ---> K- e+ nu(e) .
By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-12417, BABAR-PUB-07-015, Apr 2007.
21pp.
Presented at 42nd Rencontres de Moriond on QCD and Hadronic Interactions, La Thuile, Italy,
17-24 Mar 2007.
Published in Phys.Rev.D76:052005,2007.
e-Print: hep-ex/0607077, arXiv:0704.0020 [hep-ex] (cites: 18)
5) Measurements of Partial Branching Fractions for anti-B ---> X(u) l anti-nu and
Determination of |V(ub)|.
By BABAR Collaboration (B. Aubert et al.). BABAR-PUB-07-051, SLAC-PUB-12713, Aug 2007.
7pp.
Presented at 23rd International Symposium on Lepton-Photon Interactions at High Energy
(LP07), Daegu, Korea, 13-18 Aug 2007.
Published in Phys.Rev.Lett.100:171802,2008.
e-Print: arXiv:0708.3702 [hep-ex] (cites: 3)
6) SuperB: A High-Luminosity Asymmetric e+ e- Super Flavor Factory. Conceptual Design
Report.
M. Bona et al. SLAC-R-856, INFN-AE-07-02, LAL-07-15, May 18, 2007. 480pp.
e-Print: arXiv:0709.0451 [hep-ex] (cites: 75 )
7) Proceedings of SuperB Workshop VI New Physics at the Super Flavor Factory
Valencia ( Spain January 7-15, 2008 [http://ific.uv.es/~martinee/superb-valencia08.ps.gz]
Centros Referentes:
1) Institute: STANFORD UNIVERSITY, Department of Physics.
Institution: Stanford University
Project Leader: Patricia Burchat (burchat@stanford.edu)
Address: Stanford University
Dept. of Physics
Stanford, CA 94305-4060
USA
Web: http://www.stanford.edu/
2) Institute: UNIVERSITÀ DI ROMA LA SAPIENZA
Project leaders: Faccini, Riccardo (rfaccini@slac.stanford.edu)
Piredda, Giancarlo (Giancarlo.Piredda@roma1.infn.it)
Address: Università di Roma La Sapienza
Dipartimento di Fisica and INFN
Sezione di Roma 1
Piazzale Aldo Moro 5
I-00185 Roma
Italy
Web: http://asjedi.roma1.infn.it/home.html
Relative publications:
1) Evidence for D0-anti-D0 Mixing.
By BABAR Collaboration (B. Aubert et al.) SLAC-PUB-12385, BABAR-PUB-07-019, Mar 2007.
7pp.
Published in Phys.Rev.Lett.98:211802,2007.
e-Print: hep-ex/0703020
2) Measurement of D0 - anti-D0 mixing using the ratio of lifetimes for the decays D0 --> Kpi+, K- K+, and pi- pi+.
By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-13047, BABAR-PUB-07-068, Dec 2007.
8pp.
Published in Phys.Rev.D78:011105,2008.
e-Print: arXiv:0712.2249 [hep-ex]
3) Measurement of D0 - anti-D0 mixing from a time-dependent amplitude analysis of D0 --> K+ pi- pi0 decays.
By BABAR Collaboration (B. Aubert et al.) BABAR-PUB-08-026, SLAC-PUB-13320, Jul 2008.
7pp.
Long author list - awaiting processing.
Submitted to Physical Review Letters
e-Print: arXiv:0807.4544 [hep-ex]
4) Improved measurement of the CKM angle gamma in B-+ ---> D(*) K(*)-+ decays with a
Dalitz plot analysis of D decays to K0(S) pi+ pi- and K0(S) K+ K-.
By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-13209, BABAR-PUB-08-006, Apr 2008.
22pp.
Published in Phys.Rev.D78:034023,2008.
e-Print: arXiv:0804.2089 [hep-ex]
5) Measurement of gamma in B-+ --> D(*) K-+ decays with a Dalitz analysis of D ---> K0(s) pipi+.
By BABAR Collaboration (B. Aubert et al.). SLAC-PUB-11127, Apr 2005. 7pp.
Published in Phys.Rev.Lett.95:121802,2005.
e-Print: hep-ex/0504039
Centros Competidores:
1) Institute: UNIVERSITY OF HAWAII, Physics Department
Institution: University of Hawaii
Project Leader: Tom Browder (teb@phys.hawaii.edu)
Address: Physics Department
University of Hawaii
2505 Correa Road
Honolulu, HI 96822
Web: http://www.phys.hawaii.edu/belle/
2) Institute: THE UNIVERSITY OF MELBOURNE – School of Physics
Institution: University of Melbourne
Project leader: Professor Geoff Taylor (g.taylor@physics.unimelb.edu.au)
Address: The University of Melbourne
School of Physics
Gate 2, Swanston Street
Parkville Victoria 3052
Australia
Web: http://epp.ph.unimelb.edu.au/twiki/bin/view/EPP/BelleActivities
Competitive publications:
1) Evidence for D0 - anti-D0 Mixing.
By Belle Collaboration (M. Staric et al.). BELLE-CONF-0701, Mar 2007. 6pp.
Presented at 42nd Rencontres de Moriond on Electroweak Interactions and Unified
Theories, La Thuile, Italy, 10-17 Mar 2007.
Published in Phys.Rev.Lett.98:211803,2007.
e-Print: hep-ex/070303
2) Measurement of phi(3) with Dalitz plot analysis of B+ ---> D(*)K(*)+ decay.
By Belle Collaboration (A. Poluektov et al.). BELLE-PREPRINT-2006-14, KEK-PREPRINT2006-8, Apr 2006. 18pp.
Published in Phys.Rev.D73:112009,2006.
e-Print: hep-ex/0604054
3) Measurement of phi(3) with Dalitz plot analysis of B+- ---> D**(*) K+- decay.
By Belle Collaboration (A. Poluektov et al.). Jun 2004. 19pp.
Published in Phys.Rev.D70:072003,2004.
e-Print: hep-ex/0406067
4) Improved search for D0 - anti-D0 mixing using semileptonic decays at Belle.
By BELLE Collaboration (U. Bitenc et al.). Feb 2008. 20pp.
Published in Phys.Rev.D77:112003,2008.
e-Print: arXiv:0802.2952 [hep-ex]
5) Measurement of D0 - anti-D0 mixing in D0 ---> K(s)0 pi+ pi- decays.
By BELLE Collaboration (K. Abe et al.). BELLE-CONF-0702, Apr 2007. 7pp.
Presented at 42nd Rencontres de Moriond on Electroweak Interactions and Unified
Theories, La Thuile, Italy, 10-17 Mar 2007.
Published in Phys.Rev.Lett.99:131803,2007.
e-Print: arXiv:0704.1000 [hep-ex]
6) Determination of |V(ub)| from measurements of the inclusive charmless
semileptonic partial rates of B mesons using full reconstruction tags.
By Belle Collaboration (I. Bizjak et al.). KEK-2005-19, BELLE-2005-20, May 2005. 6pp.
Published in Phys.Rev.Lett.95:241801,2005.
e-Print: hep-ex/0505088
7) Letter of intent for KEK Super B Factory.
S. Hashimoto, (ed.) et al. KEK-REPORT-2004-4, Jun 2004. 546pp.
Objetivos y diseños de Estrategias
DELPHI:
Información general:
The DELPHI experiment at LEP (CERN) finished data taking at the end of 2000.
However, remaining activity on data analyses during 2003-2007 has been very fruitful
giving raised 61 publications. During that period 3 Ph.D. these were defended at IFIC:
 "Determination of the b quark mass at the Mz scale with the DELPHI detector at
LEP".
Author: Maria Jose Costa Mezquita
Director: Juan Fuster Verdú, Philippe Bambade
Date: 2003
 "Measurement of the Cabibbo-Kobayashi-Maskawa matrix element Vcb with
the DELPHI experiment"
Author: M. Aránzazu Oyanguren Campos
Director: Jose Salt Cairols, Patrick Roudeau
Date: 2004
 "Study of b-quark mass effects in multijet topologies with the delphi detector at
lep"
Author: Pablo Tortosa Martínez
Director: Juan Fuster Verdú, Philippe Bambade
Date: 2004