LHCb highlights: 2 slides + 2 video Stafoverleg, 9 Mar 2020 - - PowerPoint PPT Presentation

SLIDE 1

LHCb highlights: 2’ slides + 2’ video

Stafoverleg, 9 Mar 2020

9 Mar 2020 - Stafoverleg - N. Tuning

SLIDE 2

• Machining finished on all foils
• C2 & A2 etched to 150-200 micron.
• C1, C2, A2 & A3 are Torlon coated and have pt100’s
• A1, C1, C2 & A2 are NEG coated.
• VELO, SciFi, Trigger
• VELO:

ü Glue decision made ü RF foil v Pollution of cooling plant

• SciFi:

ü 1st C-frame commissioned v Beampipe installation foreseen in May v 6 C-frames on other side only ready July

• Trigger:

ü CPU version of HLT1 reaches 125 kHz on AMD server (thanks Tristan Suerink!)

• per node, scaling to 128 threads, utilising all 64 physical cores
• For HLT1+HLT2 we will have O(1000) nodes

¡ Decision to go for CPU or GPU soon

The module production team agrees that Stycast and catalyst 23LV is the best

• ption.

Module production is expected to restart in the second half of March.

presentation of today, see https://edms.cern.ch/docume "strongly advised not to circulate CO2 in detectors”

SLIDE 3

] ]

2

c ) [GeV/

−

e

+

e

−

pK ( m 5 5.5 6

2

c Candidates per 50 MeV/ 5 10 15 20 25 30 35 40 45

−

e

+

e

−

pK →

b

Λ Combinatorial

−

e

+

e π

−

pK →

b

Λ ψ / J

−

pK →

b

Λ

−

e

+

e

−

K

+

K →

s

B

−

e

+

e

*0

K → B

LHCb

Flavour Physics in 2020:

1) New baryon states 2) Input for γ 3) Measurement of |Vcb| 4) World-best limit for KS

0µ+µ-

5) Seach for CP, and observation of P violation in Λb

0 decay

6) Test of lepton-universality in Λb

0 pKµ+µ- /Λb 0 pKe+e-

https://arxiv.org/abs/1912.08139

RpK|0.1<q2<6 GeV2/c4 = 0.86 + 0.14

− 0.11 ± 0.05, Agrees with SM and with measurements of RK, RK*

SLIDE 4

NEWS

7) Limit on BF(Bs

0e+e-)

8) New result on angular distributions in B0K*0µ+µ-

s are observed. Assuming no contrib

• f B(B0

s ! e+e−) < 9.4 (11.2) ⇥ 10−9 + −

In Pursuit of New Physics with B0

s,d → `+`− Robert Fleischer a,b, Ruben Jaarsma a and Gilberto Tetlalmatzi-Xolocotzi a

• R. Fleischer et al., arXiv:1703.10160

SLIDE 5

NEWS

7) Limit on BF(Bs

0e+e-)

8) New result on angular distributions in B0K*0µ+µ- Remember run-1 result: Implications:

]

4

c /

2

[GeV

2

q

5 10 15

5

' P

• 2
• 1

1 2

LHCb

SM from DHMV

8

' P

https://arxiv.org/abs/1512.04442

3.4 σ

Altmannshofer & Straub https://arxiv.org/abs/1503.06199 https://arxiv.org/abs/1903.10434

C9

NP: New effective vector coupling

from eg. vector leptoquarks

SM

s are observed. Assuming no contrib

• f B(B0

s ! e+e−) < 9.4 (11.2) ⇥ 10−9 + −

In Pursuit of New Physics with B0

s,d → `+`− Robert Fleischer a,b, Ruben Jaarsma a and Gilberto Tetlalmatzi-Xolocotzi a

• R. Fleischer et al., arXiv:1703.10160

SLIDE 6

SLIDE 7

9 Mar 2020 - Stafoverleg - N. Tuning https://youtu.be/7bX-GTjISDY