Rare decays of b hadrons

Koppenburg, P.; Doležal, Z.; Smižanská, M.

doi:10.4249/scholarpedia.32643

Cited by 4 publications

(3 citation statements)

References 230 publications

(220 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model is similar to the leptoquark exchange discussed by many authors [41][42][43][44][45][46][47][48][49][50][51][52][53][54][55], except a general leptoquark also has a right-handed coupling to SU (2) L singlets, which is forbidden in SUSY. These additional right-handed couplings turn out to be important for explaining the g − 2 anomaly of the muon, but they do not play an essential role in explaining the B anomalies that we are discussing.…”

Section: Recent Experimental Data Have Shown Deviations From Standardmentioning

confidence: 90%

Consequences of R-parity violating interactions for anomalies in $${\bar{B}}\rightarrow D^{(*)} \tau {\bar{\nu }}$$ B ¯ → D ( ∗ ) τ ν ¯ and $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ -

Deshpande

2017

Eur. Phys. J. C

View full text Add to dashboard Cite

We investigate the possibility of explaining the enhancement in semileptonic decays ofB → D ( * ) τν, the anomalies induced bywithin the framework of Rparity violating MSSM. The exchange of down type righthanded squark coupled to quarks and leptons yields interactions which are similar to leptoquark induced interactions that have been proposed to explain theB → D ( * ) τν by tree level interactions and b → sμ + μ − anomalies by loop induced interactions, simultaneously. However, the Yukawa couplings in such theories have severe constraints from other rare processes in B and D decays. Although this interaction can provide a viable solution to the R(D ( * ) ) anomaly, we show that with the severe constraint fromB → K νν, it is impossible to solve the anomalies in the b → sμ + μ − process simultaneously.

show abstract

Section: Recent Experimental Data Have Shown Deviations From Standardmentioning

confidence: 90%

Consequences of R-parity violating interactions for anomalies in $${\bar{B}}\rightarrow D^{(*)} \tau {\bar{\nu }}$$ B ¯ → D ( ∗ ) τ ν ¯ and $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ -

Deshpande

2017

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…I will review some of the key measurements and the theory relevant for their interpretation. This description is anything but comprehensive, for which I refer to some recent excellent references [19][20][21][22] and resources, such as HFAG 23 and FLAG 9 .…”

Section: Rare Radiative B-decays In the Sm And Experimentsmentioning

confidence: 99%

Rare B-meson decays at the crossroads

Ali

2016

Int. J. Mod. Phys. A

View full text Add to dashboard Cite

Experimental era of rare [Formula: see text]-decays started with the measurement of [Formula: see text] by CLEO in 1993, followed by the measurement of the inclusive decay [Formula: see text] in 1995, which serves as the standard candle in this field. The frontier has moved in the meanwhile to the experiments at the LHC, in particular, LHCb, with the decay [Formula: see text] at about 1 part in 10[Formula: see text] being the smallest branching fraction measured so far. Experimental precision achieved in this area has put the standard model to unprecedented stringent tests and more are in the offing in the near future. I review some key measurements in radiative, semileptonic and leptonic rare [Formula: see text]-decays, contrast them with their estimates in the SM, and focus on several mismatches reported recently. They are too numerous to be ignored, yet, standing alone, none of them is significant enough to warrant the breakdown of the SM. Rare [Formula: see text]-decays find themselves at the crossroads, possibly pointing to new horizons, but quite likely requiring an improved theoretical description in the context of the SM. An independent precision experiment such as Belle II may help greatly in clearing some of the current experimental issues.

show abstract

“…The resulting H e f f can then be expressed as the sum of local operators (O i ), encoding the dynamics of processes, multiplied by effective couplings (C i ) called Wilson coefficients, describing the strength with which the O i enter the H e f f . For b → s + − transitions, the operators that are of particular importance are O 9,10 , which describe the electroweak penguin and the box diagram contributions [1,2]. Measurements of b → s + − transitions are typically performed in several bins of dilepton invariant mass squared (q 2 ).…”

Section: Introductionmentioning

confidence: 99%

Flavour anomalies at LHCb

Chatzikonstantinidis¹

2018

Proceedings of Sixth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2018)

View full text Add to dashboard Cite

Flavour-Changing Neutral-Current (FCNC) processes are exceptionally sensitive to New Physics (NP) effects and in particular to particles that could exist beyond the Standard Model (SM) but are too massive to be directly produced at present colliders. These particles can appear as virtual contributions that may induce significant effects on branching fractions and angular observables. A review of the present flavour anomalies observed by the LHCb experiment in the context of FCNC processes proceeding through b → s + − transitions is given. The results discussed are obtained from data collected at √ s = 7 and 8 TeV during Run 1, corresponding to 3 fb −1 of integrated luminosity. Results exploiting the data from Run 2 collected at √ s = 13 TeV and corresponding to 2 fb −1 of integrated luminosity, are also included.

show abstract

Rare decays of b hadrons

Cited by 4 publications

References 230 publications

Consequences of R-parity violating interactions for anomalies in $${\bar{B}}\rightarrow D^{(*)} \tau {\bar{\nu }}$$ B ¯ → D ( ∗ ) τ ν ¯ and $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ -

Consequences of R-parity violating interactions for anomalies in $${\bar{B}}\rightarrow D^{(*)} \tau {\bar{\nu }}$$ B ¯ → D ( ∗ ) τ ν ¯ and $$b\rightarrow s \mu ^+\mu ^-$$ b → s μ + μ -

Rare B-meson decays at the crossroads

Flavour anomalies at LHCb

Contact Info

Product

Resources

About